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Triggered at line # 1486 FeedWordPress version: 2010.0905 WordPress version: 3.0.1 PHP version: 5.2.17 SyndicatedPost::insert_post::_wp_id: array(3) { ["$this->_wp_id"]=> int(0) ["$dbpost"]=> array(19) { ["post_title"]=> string(33) "What’s new for Virtual SAN 6.2?" ["post_content"]=> string(12169) "<p><a href=\'http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=2145880105\' rel=\'nofollow\'> <img src=\'http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=2145880105\' border=\'0\' alt=\'\' /></a></p><p><a href=\'http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483\' >Advertise here with BSA</a></p><br /><p>Yes, finally&#8230; the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I think the list of new functionality will make that obvious.  There are a couple of clear themes in this release, and I think it is fair to say that data services / data efficiency is most important. Lets take a look at the list of what is new first and then discuss them one by one</p> <ul> <li>Deduplication and Compression</li> <li>RAID-5/6 (Erasure Coding)</li> <li>Sparse Swap Files</li> <li>Checksum / disk scrubbing</li> <li>Quality of Service / Limits</li> <li>In mem read caching</li> <li>Integrated Performance Metrics</li> <li>Enhanced Health Service</li> <li>Application support</li> </ul> <p>That is indeed a good list of new functionality, just 6 months after the previous release that brought you Stretched Clustering, 2 node Robo etc. I&#8217;ve already discussed some of these as part of the Beta announcements, but lets go over them one by one so we have all the details in one place. By the way, there also is an <a href=\"http://www.vmware.com/products/whats-new-virtual-san.html?src=vmw_so_vex_rvand_702\" >official VMware paper available here</a>.</p> <p><strong>Deduplication and Compression</strong> has probably been the number one ask from customers when it comes to features requests for Virtual SAN since version 1.0. The Deduplication and Compression is a feature which can be enabled on an all-flash configuration only. Deduplication and Compression always go hand-in-hand and is enabled on a cluster level. Note that Deduplication and Compression are referred to as nearline dedupe / compression, which basically means that deduplication and compression happens during destaging from the caching tier to the deduplication tier.</p> <p><img class=\"alignnone\" src=\"https://c2.staticflickr.com/2/1619/24285274423_17a9dda1ca.jpg\" alt=\"VSAN 6.2\" width=\"500\" height=\"343\" /></p> <p>Now lets dig a bit deeper. More specifically, deduplication granularity is 4KB and will happen first and is then followed by an attempt to compress the unique block. This block will only be stored compressed when it can be compressed down to 2KB or smaller. The domain for deduplication is the disk group in each host. Of course the question then remains, what kind of space savings can be expected? It depends is the answer. In our environments, and our testing, have shown space savings between 2x and 7x. Where 7x arefull clone desktops (optimal situation) and 2x is a SQL database. Results in other words will depend on your workoad.</p> <p>Next on the list is <strong>RAID-5/6 or Erasure Coding</strong> as it is also referred to. In the UI by the way, this is configurable through the VM Storage Policies and you do this through defining the &#8220;Fault Tolerance Method&#8221; (FTM). When you configure this you have two options: RAID-1 (Mirroring) and RAID-5/6 (Erasure Coding). Depending on how FTT (failures to tolerate) is configured when RAID-5/6 is selected you will end up with a 3+1 (RAID-5) configuration for FTT=1 and 4+2 for FTT=2.</p> <p><img class=\"alignnone\" src=\"https://c2.staticflickr.com/2/1644/24912160835_8aeeac327a_z.jpg\" alt=\"VSAN RAID-6\" width=\"640\" height=\"222\" /></p> <p>Note that &#8220;3+1&#8221; means you will have 3 data blocks and 1 parity block, in the case of 4+2 this means 4 data blocks and 2 parity blocks. Note that again this functionality is only available for all-flash configurations. There is a huge benefit to using it by the way:</p> <p>Lets take the example of a 100GB Disk:</p> <ul> <li>100GB disk with FTT =1 &amp; FTM=RAID-1 set &#8211;&gt; 200GB disk space needed</li> <li>100GB disk with FTT =1 &amp; FTM=RAID-5/6 set &#8211;&gt; 130.33GB disk space needed</li> <li>100GB disk with FTT =2 &amp; FTM=RAID-1 set &#8211;&gt; 300GB disk space needed</li> <li>100GB disk with FTT =2 &amp; FTM=RAID-5/6 set &#8211;&gt; 150GB disk space needed</li> </ul> <p>As demonstrated, the space savings are enormous, especially with FTT=2 the 2x savings can and will make a big difference. Having that said, do note that the minimum number of hosts required also change. For RAID-5 this is 4 (remember 3+1) and 6 for RAID-6 (remember 4+2). The following two screenshots demonstrate how easy it is to configure it and what the layout looks of the data in the web client.</p> <p><img src=\"https://c2.staticflickr.com/2/1487/24285296163_d9ca2c1168_z.jpg\" alt=\"\" /><br /> <img src=\"https://c2.staticflickr.com/2/1690/24818815311_91c1f22e4f_z.jpg\" alt=\"\" /></p> <p><strong>Sparse Swap Files</strong> is a new feature that can only be enabled by setting an advanced setting. It is one of those features that is a direct result of a customer feature request for cost optimization. As most of you hopefully know, when you create VM with 4GB of memory a 4GB swap file will be created on a datastore at the same time. This is to ensure memory pages can be assigned to that VM even when you are overcommitting and there is no physical memory available. With VSAN when this file is created it is created &#8220;thick&#8221; at 100% of the memory size. In other words, a 4GB swap file will take up 4GB which can&#8217;t be used by any other object/component on the VSAN datastore. When you have a handful of VMs there is nothing to worry about, but if you have thousands of VMs then this adds up quickly. By setting the advanced host setting “SwapThickProvisionedDisabled” the swap file will be provisioned thin and disk space will only be claimed when the swap file is consumed. Needless to say, but we only recommend using this when you are not overcommitting on memory. Having no space for swap and needed to write to swap wouldn&#8217;t make your workloads happy.</p> <p>Next up is the <strong>Checksum / disk scrubbing </strong>functionality. As of VSAN 6.2 for every write (4KB) a checksum is calculated and stored separately from the data (5-byte). Note that this happens even before the write occurs to the caching tier so even an SSD corruption would not impact data integrity. On a read of course the checksum is validated and if there is a checksum error it will be corrected automatically. Also, in order to ensure that over time stale data does not decay in any shape or form, there is a disk scrubbing process which reads the blocks and corrects when needed. Intel crc32c is leveraged to optimize the checksum process. And note that it is enabled by default for ALL virtual machines as of this release, but if desired it can be disabled as well through policy for VMs which do not require this functionality.</p> <p><img src=\"https://c2.staticflickr.com/2/1571/24818804231_0e0be1b059_z.jpg\" alt=\"\" /></p> <p>Another big ask, primarily by service providers, was <strong>Quality of Service</strong> functionality. There are many aspects of QoS but one of the major asks was definitely the capability to <strong>limit</strong> VMs or Virtual Disks to a certain number of IOPS through policy. This simply to prevent a single VM from consuming all available resources of a host. One thing to note is that when you set a limit of 1000 IOPS VSAN uses a block size of 32KB by default. Meaning that when pushing 64KB writes the 1000 IOPS limits is actual 500. When you are doing 4KB writes (or reads for that matter) however, we still count with 32KB blocks as this is a normalized value. Keep this in mind when setting the limit.</p> <p><img src=\"https://c2.staticflickr.com/2/1644/24616772490_cf51e508c5_z.jpg\" alt=\"\" /></p> <p>When it comes to caching there was also a nice &#8220;little&#8221; enhancement. As of 6.2 VSAN also has a <strong>small in-memory read cache</strong>. Small in this case means 0.4% of a host&#8217;s memory capacity up to a max of 1GB. Note that this in-memory cache is a client side cache, meaning that the blocks of a VM are cached on the host where the VM is located.</p> <p>Besides all these great performance and efficiency enhancements of course a lot of work has also been done around the operational aspects. As of VSAN 6.2 no longer do you as an admin need to dive in to the VSAN observer, but you can just open up the Web Client to see all <strong>performance statistics</strong> you want to see about VSAN. It provides a great level of detail ranging from how a cluster is behaving down to the individual disk. What I personally feel is very interesting about this performance monitoring solution is that all the data is stored on VSAN itself. When you enable the performance service you simply select the VSAN storage policy and you are set. All data is stored on VSAN and also all the calculations are done by your hosts. Yes indeed, a distributed and decentralized performance monitoring solution, where the Web Client is just showing the data it is provided.</p> <p><img src=\"https://c2.staticflickr.com/2/1578/24794219252_f4d3226f24_z.jpg\" alt=\"\" /></p> <p>Of course all new functionality, where applicable, has <strong>health check tests</strong>. This is one of those things that I got used to so fast, and already take for granted. The Health Check will make your life as an admin so much easier, not just the regular tests but also the pro-active tests which you can run whenever you desire.</p> <p>Last but not least I want to call out the work that has been done around application support, I think especially the support for <strong>core SAP applications</strong> is something that stands out!</p> <p>If you ask me, but of course I am heavily biased, this release is the best release so far and contains all the functionality many of you have been asking for. I hope that you are as excited about it as I am, and will consider VSAN for new projects or when current storage is about to be replaced.</p> <p>\"<a rel=\"nofollow\" href=\"http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/\">What&#8217;s new for Virtual SAN 6.2?</a>\" originally appeared on <a href=\"http://www.yellow-bricks.com\">Yellow-Bricks.com</a>. Follow me on twitter - <a href=\"http://twitter.com/DuncanYB\">@DuncanYB.</a></p> <p></a></p> <div class=\"feedflare\"> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:yIl2AUoC8zA\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?d=yIl2AUoC8zA\" border=\"0\"></img></a> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:dnMXMwOfBR0\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?d=dnMXMwOfBR0\" border=\"0\"></img></a> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:F7zBnMyn0Lo\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?i=EkmyEbKEEaU:B7-XxjqXKRc:F7zBnMyn0Lo\" border=\"0\"></img></a> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:qj6IDK7rITs\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?d=qj6IDK7rITs\" border=\"0\"></img></a> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:V_sGLiPBpWU\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?i=EkmyEbKEEaU:B7-XxjqXKRc:V_sGLiPBpWU\" border=\"0\"></img></a> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:gIN9vFwOqvQ\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?i=EkmyEbKEEaU:B7-XxjqXKRc:gIN9vFwOqvQ\" border=\"0\"></img></a> <a href=\"http://feeds.feedburner.com/~ff/YellowBricks?a=EkmyEbKEEaU:B7-XxjqXKRc:l6gmwiTKsz0\"><img src=\"http://feeds.feedburner.com/~ff/YellowBricks?d=l6gmwiTKsz0\" border=\"0\"></img></a> </div><img src=\"http://feeds.feedburner.com/~r/YellowBricks/~4/EkmyEbKEEaU\" height=\"1\" width=\"1\" alt=\"\"/>" ["post_excerpt"]=> string(1145) "<p><a href=\"http://rss.buysellads.com/click.php?z=1281483&amp;k=97a1aa732ca094e7845b7a6467d0d55c&amp;a=16992&amp;c=1861554053\" target=\"_blank\" rel=\"nofollow\"><br /> <img src=\"http://rss.buysellads.com/img.php?z=1281483&amp;k=97a1aa732ca094e7845b7a6467d0d55c&amp;a=16992&amp;c=1861554053\" border=\"0\" alt=\"\" /></a></p> <p><a href=\"http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483\" target=\"_blank\">Advertise here with BSA</a></p> <p>Yes, finally&#8230; the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I think the list of new functionality will make that obvious.  There are a couple of clear themes in this [&#8230;]</p> <p>\"<a rel=\"nofollow\" href=\"http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/\">What&#8217;s new for Virtual SAN 6.2?</a>\" originally appeared on <a href=\"http://www.yellow-bricks.com\">Yellow-Bricks.com</a>. Follow me on twitter - <a href=\"http://twitter.com/DuncanYB\">@DuncanYB.</a></p> <p></a></p>" ["epoch"]=> array(3) { ["issued"]=> int(1455110587) ["created"]=> NULL ["modified"]=> int(1455110587) } ["post_date"]=> string(19) "2016-02-10 06:23:07" ["post_modified"]=> string(19) "2016-02-10 06:23:07" ["post_date_gmt"]=> string(19) "2016-02-10 13:23:07" ["post_modified_gmt"]=> string(19) "2016-02-10 13:23:07" ["post_status"]=> string(7) "publish" ["comment_status"]=> string(6) "closed" ["ping_status"]=> string(6) "closed" ["guid"]=> string(37) "http://www.yellow-bricks.com/?p=16992" ["meta"]=> array(9) { ["syndication_source"]=> string(13) "Yellow Bricks" ["syndication_source_uri"]=> string(28) "http://www.yellow-bricks.com" ["syndication_source_id"]=> string(34) "http://www.yellow-bricks.com/feed/" ["rss:comments"]=> string(79) "http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/#comments" ["wfw:commentRSS"]=> string(75) "http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/feed/" ["syndication_feed"]=> string(34) "http://www.yellow-bricks.com/feed/" ["syndication_feed_id"]=> string(2) "18" ["syndication_permalink"]=> string(59) "http://feedproxy.google.com/~r/YellowBricks/~3/EkmyEbKEEaU/" ["syndication_item_hash"]=> string(32) "59030f7b54d65bb2915cfc3dd4a20600" } ["pretax"]=> array(2) { ["category"]=> array(0) { } ["post_tag"]=> array(0) { } } ["taxed"]=> array(2) { ["category"]=> array(11) { [0]=> string(6) "Server" [1]=> string(16) "Software Defined" [2]=> string(7) "Storage" [3]=> string(11) "Virtual SAN" [4]=> string(3) "6.2" [5]=> string(3) "6.x" [6]=> string(24) "software defined storage" [7]=> string(11) "virtual san" [8]=> string(6) "VMware" [9]=> string(4) "vsan" [10]=> string(7) "vSphere" } ["post_tag"]=> array(0) { } } ["post_type"]=> string(4) "post" ["post_author"]=> int(10) ["tax_input"]=> array(2) { ["category"]=> array(9) { [0]=> int(5107) [1]=> int(26) [2]=> int(6903) [3]=> int(10069) [4]=> int(9897) [5]=> int(5899) [6]=> int(30) [7]=> int(4593) [8]=> int(6) } ["post_tag"]=> array(1) { [0]=> int(69) } } ["post_pingback"]=> bool(false) } ["$this"]=> object(SyndicatedPost)#35 (12) { ["item"]=> array(45) { ["description"]=> string(1096) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=1861554053' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=1861554053' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>Yes, finally&#8230; the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I think the list of new functionality will make that obvious.  There are a couple of clear themes in this [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/">What&#8217;s new for Virtual SAN 6.2?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["guid@ispermalink"]=> string(5) "false" ["guid@"]=> string(11) "ispermalink" ["guid"]=> string(37) "http://www.yellow-bricks.com/?p=16992" ["category#11"]=> string(7) "vSphere" ["category#10"]=> string(4) "vsan" ["category#9"]=> string(6) "VMware" ["category#8"]=> string(11) "virtual san" ["category#7"]=> string(24) "software defined storage" ["category#6"]=> string(3) "6.x" ["category#5"]=> string(3) "6.2" ["category#4"]=> string(11) "Virtual SAN" ["category#3"]=> string(7) "Storage" ["category#2"]=> string(16) "Software Defined" ["category"]=> string(6) "Server" ["pubdate"]=> string(31) "Wed, 10 Feb 2016 13:23:07 +0000" ["comments"]=> string(79) "http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/#comments" ["link"]=> string(59) "http://feedproxy.google.com/~r/YellowBricks/~3/EkmyEbKEEaU/" ["title"]=> string(33) "What’s new for Virtual SAN 6.2?" ["title#"]=> int(1) ["link#"]=> int(1) ["comments#"]=> int(1) ["pubdate#"]=> int(1) ["category#"]=> int(11) ["guid#"]=> int(1) ["description#"]=> int(1) ["dc"]=> array(14) { ["creator"]=> string(13) "Duncan Epping" ["creator#"]=> int(1) ["subject#"]=> int(11) ["subject"]=> string(6) "Server" ["subject#2"]=> string(16) "Software Defined" ["subject#3"]=> string(7) "Storage" ["subject#4"]=> string(11) "Virtual SAN" ["subject#5"]=> string(3) "6.2" ["subject#6"]=> string(3) "6.x" ["subject#7"]=> string(24) "software defined storage" ["subject#8"]=> string(11) "virtual san" ["subject#9"]=> string(6) "VMware" ["subject#10"]=> string(4) "vsan" ["subject#11"]=> string(7) "vSphere" } ["content"]=> array(2) { ["encoded"]=> string(12098) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=2145880105' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=2145880105' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>Yes, finally&#8230; the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I think the list of new functionality will make that obvious.  There are a couple of clear themes in this release, and I think it is fair to say that data services / data efficiency is most important. Lets take a look at the list of what is new first and then discuss them one by one</p> <ul> <li>Deduplication and Compression</li> <li>RAID-5/6 (Erasure Coding)</li> <li>Sparse Swap Files</li> <li>Checksum / disk scrubbing</li> <li>Quality of Service / Limits</li> <li>In mem read caching</li> <li>Integrated Performance Metrics</li> <li>Enhanced Health Service</li> <li>Application support</li> </ul> <p>That is indeed a good list of new functionality, just 6 months after the previous release that brought you Stretched Clustering, 2 node Robo etc. I&#8217;ve already discussed some of these as part of the Beta announcements, but lets go over them one by one so we have all the details in one place. By the way, there also is an <a href="http://www.vmware.com/products/whats-new-virtual-san.html?src=vmw_so_vex_rvand_702" target="_blank">official VMware paper available here</a>.</p> <p><strong>Deduplication and Compression</strong> has probably been the number one ask from customers when it comes to features requests for Virtual SAN since version 1.0. The Deduplication and Compression is a feature which can be enabled on an all-flash configuration only. Deduplication and Compression always go hand-in-hand and is enabled on a cluster level. Note that Deduplication and Compression are referred to as nearline dedupe / compression, which basically means that deduplication and compression happens during destaging from the caching tier to the deduplication tier.</p> <p><img class="alignnone" src="https://c2.staticflickr.com/2/1619/24285274423_17a9dda1ca.jpg" alt="VSAN 6.2" width="500" height="343" /></p> <p>Now lets dig a bit deeper. More specifically, deduplication granularity is 4KB and will happen first and is then followed by an attempt to compress the unique block. This block will only be stored compressed when it can be compressed down to 2KB or smaller. The domain for deduplication is the disk group in each host. Of course the question then remains, what kind of space savings can be expected? It depends is the answer. In our environments, and our testing, have shown space savings between 2x and 7x. Where 7x arefull clone desktops (optimal situation) and 2x is a SQL database. Results in other words will depend on your workoad.</p> <p>Next on the list is <strong>RAID-5/6 or Erasure Coding</strong> as it is also referred to. In the UI by the way, this is configurable through the VM Storage Policies and you do this through defining the &#8220;Fault Tolerance Method&#8221; (FTM). When you configure this you have two options: RAID-1 (Mirroring) and RAID-5/6 (Erasure Coding). Depending on how FTT (failures to tolerate) is configured when RAID-5/6 is selected you will end up with a 3+1 (RAID-5) configuration for FTT=1 and 4+2 for FTT=2.</p> <p><img class="alignnone" src="https://c2.staticflickr.com/2/1644/24912160835_8aeeac327a_z.jpg" alt="VSAN RAID-6" width="640" height="222" /></p> <p>Note that &#8220;3+1&#8221; means you will have 3 data blocks and 1 parity block, in the case of 4+2 this means 4 data blocks and 2 parity blocks. Note that again this functionality is only available for all-flash configurations. There is a huge benefit to using it by the way:</p> <p>Lets take the example of a 100GB Disk:</p> <ul> <li>100GB disk with FTT =1 &amp; FTM=RAID-1 set &#8211;&gt; 200GB disk space needed</li> <li>100GB disk with FTT =1 &amp; FTM=RAID-5/6 set &#8211;&gt; 130.33GB disk space needed</li> <li>100GB disk with FTT =2 &amp; FTM=RAID-1 set &#8211;&gt; 300GB disk space needed</li> <li>100GB disk with FTT =2 &amp; FTM=RAID-5/6 set &#8211;&gt; 150GB disk space needed</li> </ul> <p>As demonstrated, the space savings are enormous, especially with FTT=2 the 2x savings can and will make a big difference. Having that said, do note that the minimum number of hosts required also change. For RAID-5 this is 4 (remember 3+1) and 6 for RAID-6 (remember 4+2). The following two screenshots demonstrate how easy it is to configure it and what the layout looks of the data in the web client.</p> <p><img src="https://c2.staticflickr.com/2/1487/24285296163_d9ca2c1168_z.jpg" alt="" /><br /> <img src="https://c2.staticflickr.com/2/1690/24818815311_91c1f22e4f_z.jpg" alt="" /></p> <p><strong>Sparse Swap Files</strong> is a new feature that can only be enabled by setting an advanced setting. It is one of those features that is a direct result of a customer feature request for cost optimization. As most of you hopefully know, when you create VM with 4GB of memory a 4GB swap file will be created on a datastore at the same time. This is to ensure memory pages can be assigned to that VM even when you are overcommitting and there is no physical memory available. With VSAN when this file is created it is created &#8220;thick&#8221; at 100% of the memory size. In other words, a 4GB swap file will take up 4GB which can&#8217;t be used by any other object/component on the VSAN datastore. When you have a handful of VMs there is nothing to worry about, but if you have thousands of VMs then this adds up quickly. By setting the advanced host setting “SwapThickProvisionedDisabled” the swap file will be provisioned thin and disk space will only be claimed when the swap file is consumed. Needless to say, but we only recommend using this when you are not overcommitting on memory. Having no space for swap and needed to write to swap wouldn&#8217;t make your workloads happy.</p> <p>Next up is the <strong>Checksum / disk scrubbing </strong>functionality. As of VSAN 6.2 for every write (4KB) a checksum is calculated and stored separately from the data (5-byte). Note that this happens even before the write occurs to the caching tier so even an SSD corruption would not impact data integrity. On a read of course the checksum is validated and if there is a checksum error it will be corrected automatically. Also, in order to ensure that over time stale data does not decay in any shape or form, there is a disk scrubbing process which reads the blocks and corrects when needed. Intel crc32c is leveraged to optimize the checksum process. And note that it is enabled by default for ALL virtual machines as of this release, but if desired it can be disabled as well through policy for VMs which do not require this functionality.</p> <p><img src="https://c2.staticflickr.com/2/1571/24818804231_0e0be1b059_z.jpg" alt="" /></p> <p>Another big ask, primarily by service providers, was <strong>Quality of Service</strong> functionality. There are many aspects of QoS but one of the major asks was definitely the capability to <strong>limit</strong> VMs or Virtual Disks to a certain number of IOPS through policy. This simply to prevent a single VM from consuming all available resources of a host. One thing to note is that when you set a limit of 1000 IOPS VSAN uses a block size of 32KB by default. Meaning that when pushing 64KB writes the 1000 IOPS limits is actual 500. When you are doing 4KB writes (or reads for that matter) however, we still count with 32KB blocks as this is a normalized value. Keep this in mind when setting the limit.</p> <p><img src="https://c2.staticflickr.com/2/1644/24616772490_cf51e508c5_z.jpg" alt="" /></p> <p>When it comes to caching there was also a nice &#8220;little&#8221; enhancement. As of 6.2 VSAN also has a <strong>small in-memory read cache</strong>. Small in this case means 0.4% of a host&#8217;s memory capacity up to a max of 1GB. Note that this in-memory cache is a client side cache, meaning that the blocks of a VM are cached on the host where the VM is located.</p> <p>Besides all these great performance and efficiency enhancements of course a lot of work has also been done around the operational aspects. As of VSAN 6.2 no longer do you as an admin need to dive in to the VSAN observer, but you can just open up the Web Client to see all <strong>performance statistics</strong> you want to see about VSAN. It provides a great level of detail ranging from how a cluster is behaving down to the individual disk. What I personally feel is very interesting about this performance monitoring solution is that all the data is stored on VSAN itself. When you enable the performance service you simply select the VSAN storage policy and you are set. All data is stored on VSAN and also all the calculations are done by your hosts. Yes indeed, a distributed and decentralized performance monitoring solution, where the Web Client is just showing the data it is provided.</p> <p><img src="https://c2.staticflickr.com/2/1578/24794219252_f4d3226f24_z.jpg" alt="" /></p> <p>Of course all new functionality, where applicable, has <strong>health check tests</strong>. This is one of those things that I got used to so fast, and already take for granted. The Health Check will make your life as an admin so much easier, not just the regular tests but also the pro-active tests which you can run whenever you desire.</p> <p>Last but not least I want to call out the work that has been done around application support, I think especially the support for <strong>core SAP applications</strong> is something that stands out!</p> <p>If you ask me, but of course I am heavily biased, this release is the best release so far and contains all the functionality many of you have been asking for. I hope that you are as excited about it as I am, and will consider VSAN for new projects or when current storage is about to be replaced.</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/">What&#8217;s new for Virtual SAN 6.2?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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["guid"]=> array(1) { [0]=> array(6) { ["data"]=> string(37) "http://www.yellow-bricks.com/?p=16992" ["attribs"]=> array(1) { [""]=> array(1) { ["isPermaLink"]=> string(5) "false" } } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1096) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=1861554053' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=1861554053' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>Yes, finally&#8230; the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I think the list of new functionality will make that obvious.  There are a couple of clear themes in this [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/02/10/whats-new-for-virtual-san-6-2/">What&#8217;s new for Virtual SAN 6.2?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(12098) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=2145880105' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16992&c=2145880105' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>Yes, finally&#8230; the Virtual SAN 6.2 release has just been announced. Needless to say, but I am very excited about this release. This is the release that I have personally been waiting for. Why? Well I think the list of new functionality will make that obvious.  There are a couple of clear themes in this release, and I think it is fair to say that data services / data efficiency is most important. Lets take a look at the list of what is new first and then discuss them one by one</p> <ul> <li>Deduplication and Compression</li> <li>RAID-5/6 (Erasure Coding)</li> <li>Sparse Swap Files</li> <li>Checksum / disk scrubbing</li> <li>Quality of Service / Limits</li> <li>In mem read caching</li> <li>Integrated Performance Metrics</li> <li>Enhanced Health Service</li> <li>Application support</li> </ul> <p>That is indeed a good list of new functionality, just 6 months after the previous release that brought you Stretched Clustering, 2 node Robo etc. I&#8217;ve already discussed some of these as part of the Beta announcements, but lets go over them one by one so we have all the details in one place. By the way, there also is an <a href="http://www.vmware.com/products/whats-new-virtual-san.html?src=vmw_so_vex_rvand_702" target="_blank">official VMware paper available here</a>.</p> <p><strong>Deduplication and Compression</strong> has probably been the number one ask from customers when it comes to features requests for Virtual SAN since version 1.0. The Deduplication and Compression is a feature which can be enabled on an all-flash configuration only. Deduplication and Compression always go hand-in-hand and is enabled on a cluster level. Note that Deduplication and Compression are referred to as nearline dedupe / compression, which basically means that deduplication and compression happens during destaging from the caching tier to the deduplication tier.</p> <p><img class="alignnone" src="https://c2.staticflickr.com/2/1619/24285274423_17a9dda1ca.jpg" alt="VSAN 6.2" width="500" height="343" /></p> <p>Now lets dig a bit deeper. More specifically, deduplication granularity is 4KB and will happen first and is then followed by an attempt to compress the unique block. This block will only be stored compressed when it can be compressed down to 2KB or smaller. The domain for deduplication is the disk group in each host. Of course the question then remains, what kind of space savings can be expected? It depends is the answer. In our environments, and our testing, have shown space savings between 2x and 7x. Where 7x arefull clone desktops (optimal situation) and 2x is a SQL database. Results in other words will depend on your workoad.</p> <p>Next on the list is <strong>RAID-5/6 or Erasure Coding</strong> as it is also referred to. In the UI by the way, this is configurable through the VM Storage Policies and you do this through defining the &#8220;Fault Tolerance Method&#8221; (FTM). When you configure this you have two options: RAID-1 (Mirroring) and RAID-5/6 (Erasure Coding). Depending on how FTT (failures to tolerate) is configured when RAID-5/6 is selected you will end up with a 3+1 (RAID-5) configuration for FTT=1 and 4+2 for FTT=2.</p> <p><img class="alignnone" src="https://c2.staticflickr.com/2/1644/24912160835_8aeeac327a_z.jpg" alt="VSAN RAID-6" width="640" height="222" /></p> <p>Note that &#8220;3+1&#8221; means you will have 3 data blocks and 1 parity block, in the case of 4+2 this means 4 data blocks and 2 parity blocks. Note that again this functionality is only available for all-flash configurations. There is a huge benefit to using it by the way:</p> <p>Lets take the example of a 100GB Disk:</p> <ul> <li>100GB disk with FTT =1 &amp; FTM=RAID-1 set &#8211;&gt; 200GB disk space needed</li> <li>100GB disk with FTT =1 &amp; FTM=RAID-5/6 set &#8211;&gt; 130.33GB disk space needed</li> <li>100GB disk with FTT =2 &amp; FTM=RAID-1 set &#8211;&gt; 300GB disk space needed</li> <li>100GB disk with FTT =2 &amp; FTM=RAID-5/6 set &#8211;&gt; 150GB disk space needed</li> </ul> <p>As demonstrated, the space savings are enormous, especially with FTT=2 the 2x savings can and will make a big difference. Having that said, do note that the minimum number of hosts required also change. For RAID-5 this is 4 (remember 3+1) and 6 for RAID-6 (remember 4+2). The following two screenshots demonstrate how easy it is to configure it and what the layout looks of the data in the web client.</p> <p><img src="https://c2.staticflickr.com/2/1487/24285296163_d9ca2c1168_z.jpg" alt="" /><br /> <img src="https://c2.staticflickr.com/2/1690/24818815311_91c1f22e4f_z.jpg" alt="" /></p> <p><strong>Sparse Swap Files</strong> is a new feature that can only be enabled by setting an advanced setting. It is one of those features that is a direct result of a customer feature request for cost optimization. As most of you hopefully know, when you create VM with 4GB of memory a 4GB swap file will be created on a datastore at the same time. This is to ensure memory pages can be assigned to that VM even when you are overcommitting and there is no physical memory available. With VSAN when this file is created it is created &#8220;thick&#8221; at 100% of the memory size. In other words, a 4GB swap file will take up 4GB which can&#8217;t be used by any other object/component on the VSAN datastore. When you have a handful of VMs there is nothing to worry about, but if you have thousands of VMs then this adds up quickly. By setting the advanced host setting “SwapThickProvisionedDisabled” the swap file will be provisioned thin and disk space will only be claimed when the swap file is consumed. Needless to say, but we only recommend using this when you are not overcommitting on memory. Having no space for swap and needed to write to swap wouldn&#8217;t make your workloads happy.</p> <p>Next up is the <strong>Checksum / disk scrubbing </strong>functionality. As of VSAN 6.2 for every write (4KB) a checksum is calculated and stored separately from the data (5-byte). Note that this happens even before the write occurs to the caching tier so even an SSD corruption would not impact data integrity. On a read of course the checksum is validated and if there is a checksum error it will be corrected automatically. Also, in order to ensure that over time stale data does not decay in any shape or form, there is a disk scrubbing process which reads the blocks and corrects when needed. Intel crc32c is leveraged to optimize the checksum process. And note that it is enabled by default for ALL virtual machines as of this release, but if desired it can be disabled as well through policy for VMs which do not require this functionality.</p> <p><img src="https://c2.staticflickr.com/2/1571/24818804231_0e0be1b059_z.jpg" alt="" /></p> <p>Another big ask, primarily by service providers, was <strong>Quality of Service</strong> functionality. There are many aspects of QoS but one of the major asks was definitely the capability to <strong>limit</strong> VMs or Virtual Disks to a certain number of IOPS through policy. This simply to prevent a single VM from consuming all available resources of a host. One thing to note is that when you set a limit of 1000 IOPS VSAN uses a block size of 32KB by default. Meaning that when pushing 64KB writes the 1000 IOPS limits is actual 500. When you are doing 4KB writes (or reads for that matter) however, we still count with 32KB blocks as this is a normalized value. Keep this in mind when setting the limit.</p> <p><img src="https://c2.staticflickr.com/2/1644/24616772490_cf51e508c5_z.jpg" alt="" /></p> <p>When it comes to caching there was also a nice &#8220;little&#8221; enhancement. As of 6.2 VSAN also has a <strong>small in-memory read cache</strong>. Small in this case means 0.4% of a host&#8217;s memory capacity up to a max of 1GB. Note that this in-memory cache is a client side cache, meaning that the blocks of a VM are cached on the host where the VM is located.</p> <p>Besides all these great performance and efficiency enhancements of course a lot of work has also been done around the operational aspects. As of VSAN 6.2 no longer do you as an admin need to dive in to the VSAN observer, but you can just open up the Web Client to see all <strong>performance statistics</strong> you want to see about VSAN. It provides a great level of detail ranging from how a cluster is behaving down to the individual disk. What I personally feel is very interesting about this performance monitoring solution is that all the data is stored on VSAN itself. When you enable the performance service you simply select the VSAN storage policy and you are set. All data is stored on VSAN and also all the calculations are done by your hosts. Yes indeed, a distributed and decentralized performance monitoring solution, where the Web Client is just showing the data it is provided.</p> <p><img src="https://c2.staticflickr.com/2/1578/24794219252_f4d3226f24_z.jpg" alt="" /></p> <p>Of course all new functionality, where applicable, has <strong>health check tests</strong>. This is one of those things that I got used to so fast, and already take for granted. 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I am not going to rehash that as I think it was pretty clear around what Datrium DVX is. Datrium DVX is a combination of &#8220;host local data services&#8221; and network accessed storage capacity. This basically means that [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/29/datrium-dvx-goes-ga/">Datrium DVX goes GA</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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I am not going to rehash that as I think it was pretty clear around what Datrium DVX is. Datrium DVX is a combination of &#8220;host local data services&#8221; and network accessed storage capacity. This basically means that you utilize local flash resources for read caching (deduped before stored on the flash tier), writes will go directly to the &#8220;NetShelf&#8221; as Datrium calls it, which is basically your persistent layer. The write is compressed by the way before it is send to the NetShelf, and on theNetShelf itself there is a also a dedupe process that runs periodically to &#8220;collect garbage&#8221; and optimize the system for capacity.</p> <p><img class="aligncenter" src="http://www.datrium.com/wp-content/uploads/2015/06/Datrium-DVXChart.svg" alt="" width="462" height="370" /></p> <p>I had a chat with the team from Datrium and we spoke about what was new with GA and stuff that I hadn&#8217;t covered yet in my previous article. Some of the facts from that call:</p> <ul> <li>The DVX list price is $125,000. This includes a NetShelf D12X4 appliance and unlimited licenses for DVX Hyperdriver software on vSphere hosts <ul> <li>Servers and SSDs must be purchased and supported independently</li> <li>There currently is a limit of 32 hosts connected to a NetShelf</li> <li>With 32 hosts the expected aggregate is 1m IOPS</li> </ul> </li> <li>The NetShelf D12X4 appliance comes with 48TB raw, or 60TB – 180TB effective capacity at common deduplication and compression rates for Enterprise data (2x-6x) <ul> <li>Expected effective capacity on average is around 125TB</li> </ul> </li> <li>The NetShelf comes in an HA configuration with 2 controllers and mirrored NVRAM, no single point of failure</li> <li>Datrium DVX takes up to 20% of the host CPU resources, but this is the most it will take and only when running at max speed, so typically CPU resources used will be much lower</li> <li>Has &#8220;data locality&#8221;, meaning that when a VM is migrated between hosts than the cache will be read from the &#8220;source&#8221; host to the &#8220;destination&#8221; so that the &#8220;destination&#8221; warms up</li> </ul> <p>I guess that says it all. Well there&#8217;s a bit around support for hypervisors and things like VVols and VAAI. Today Datrium only supports vSphere, and it wasn&#8217;t clear if and when other hypervisors would be supported. When it comes to VAAI it was mentioned that VAAI clones are fully supported as it stands today. On top of that Datrium is also working hard on enabling a VVol capable solution, they have joined the VVol program and are looking forward to release their VVol capable software, I am sure that when they do I will talk to them again.</p> <p>A couple of things are missing in todays offering, which would definitely be nice to have, or in some cases even a must. Native replication and array based snapshots for instance. Today Datrium partners with Zerto, and of course VMware customers can use vSphere Replication for free. Snapshots rely on vSphere today, but there are plans to have them natively on the array at some point. Also, when you run out of capacity and you add a NetShelf, this will become a new mountpoint, it would be nice if this was scale-out, and the Datrium folks agreed but didn&#8217;t commit to anything (of course). Overall I think it is an interesting solution, and with 30 install sites for the beta I think it is safe to say that they will be a player to consider, but only time will tell.</p> <p>Thanks guys for taking the time to brief me.</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/29/datrium-dvx-goes-ga/">Datrium DVX goes GA</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1107) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=433472558' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=433472558' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I was just listening to the VMware earnings call, and needless to say that I was very excited hearing all the great news about Virtual SAN. When I talk to customers this is something that comes up every now and then, they want to know where we stand in the market. I figured I would [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/27/virtual-san-the-leader-in-the-hyper-converged-market/">Virtual SAN, the leader in the hyper-converged market!</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(4194) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=487404925' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=487404925' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I was just listening to the VMware earnings call, and needless to say that I was very excited hearing all the great news about Virtual SAN. When I talk to customers this is something that comes up every now and then, they want to know where we stand in the market. I figured I would share what was stated by Carl Eschenbach and Pat Gelsinger at the <a href="http://ir.vmware.com/eventdetail.cfm?EventID=168860" target="_blank">2015 Q4 earnings call</a>:</p> <blockquote> <p class="p p5">Summarizing a few other product areas, our hyper-converged offerings based on VMware Virtual SAN experienced significant traction. Specifically, our Virtual SAN business saw successes across a wide variety of industries, market segments, and geos. In Q4, total VSAN bookings grew nearly 200% year-over-year, and <span style="text-decoration: underline;">customer count has increased to over 3,000</span> versus over 1,000 a year ago. We are now well over $100 million annual run rate per total bookings.</p> <p class="p p5">With our next release of VSAN in Q1, we expect our momentum to build given the powerful new enterprise capabilities, the product brings to market. Taking into account, the hardware associated with running the Virtual SAN software and our current booking to run rate, <span style="text-decoration: underline;">we believe we are the industry leader</span> in the hyper-converged offerings measured both by software and as an appliance.</p> </blockquote> <p>And the best is yet to come&#8230; New version is around the corner, and I can&#8217;t wait for it to be released. Make sure to <a href="http://www.vmware.com/digitalenterprise?src=sc_569fec388f2c9&amp;cid=70134000000Nz2D" target="_blank">sign up for the launch events</a>! (or attend one of the many VMUGs the upcoming months, I will personally be presenting in Newcastle, Johannesburg, Durban, Capetown and Den Bosch)</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/27/virtual-san-the-leader-in-the-hyper-converged-market/">Virtual SAN, the leader in the hyper-converged market!</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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that comes up every now and then, I have written about this before, but it never hurts to repeat some of it. The comment I got was around rebuild time of failed drives in VSAN, surely it takes longer than with a &#8220;legacy&#8221; storage system. The answer of course is: it depends (on [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/26/rebuilding-failed-disk-in-vsan-versus-legacy-storage/">Rebuilding failed disk in VSAN versus legacy storage</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(4996) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16973&c=1840485910' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16973&c=1840485910' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>This is one of those questions that comes up every now and then, I have <a href="http://www.yellow-bricks.com/2014/05/15/long-will-vsan-rebuilding-take-large-drives/" target="_blank">written</a> about this before, but it never hurts to repeat some of it. The comment I got was around rebuild time of failed drives in VSAN, surely it takes longer than with a &#8220;legacy&#8221; storage system. The answer of course is: it depends (on many factors).</p> <p>But what does it depend on? Well it depends on what exactly we are talking about, but in general I think the following applies:</p> <p>With VSAN components (copies of objects, in other words copies of data) are placed across multiple hosts, multiple diskgroups and multiple disks. Basically if you have a cluster of lets say 8 hosts with 7 disks each and you have 200 VMs then the data of those 200 VMs will be spread across 8 hosts and 56 disks in total. If one of those 56 disks happens to fail then the data that was stored on that disk would need to be reprotected. That data is coming from the other 7 hosts which is potentially 49 disks in total. You may ask, why not 55 disks? Well because replica copies are never stored on the same hosts for resiliency purposes, look at the diagram below where a single object is split in to 2 data components and a witness, they are all located on different hosts!</p> <p><img src="http://farm8.staticflickr.com/7312/9799202025_90e357f8de.jpg" alt="" /></p> <p>We do not “mirror” disks, we mirror the data itself, and the data can and will be place anywhere. This means that when a failure has occurred of a disk within a diskgroup on a host all remaining disk groups / disk / hosts will be helping to rebuild the impacted data, which is 49 disks potentially. Note that not only will disks and hosts containing impacted objects help rebuilding the data, all 8 hosts and 55 disks will be able to receive the replica data!</p> <p>Now compare this to a RAID set with a spare disk. In the case of a spare disk you have 1 disk which is receiving all the data that is being rebuild. That single disk can only take an X number of IOPS. Lets say it is a really fast disk and it can take 200 IOPS. Compare that to VSAN… Lets say you used really slow disks which only do 75 IOPS… Still that is (potentially) 49 disks x 75 IOPS for reads and 55 disks for writes.</p> <p class="p1"><span class="s1">That is the major difference, we don’t have a single drive as a designated hot spare (or should I say bottleneck?), we have the whole cluster as a hot spare! As such rebuild times when using similar drives should always be faster with VSAN compared to traditional storage. </span></p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/26/rebuilding-failed-disk-in-vsan-versus-legacy-storage/">Rebuilding failed disk in VSAN versus legacy storage</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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{ ["data"]=> string(37) "http://www.yellow-bricks.com/?p=16967" ["attribs"]=> array(1) { [""]=> array(1) { ["isPermaLink"]=> string(5) "false" } } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1159) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16967&c=911882702' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16967&c=911882702' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I had a question today around support for SMP-FT in an EMC VPLEX environment. It is well known that SMP-FT isn&#8217;t supported in a stretched VSAN environment, but what about other types of stretched storage? Is that a VSAN specific constraint? (Legacy) FT appears to be supported for VPLEX and other types of stretched storage? SMP-FT is [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/19/smp-ft-and-any-type-of-stretched-storage-support/">SMP-FT and (any type of) stretched storage support</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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with BSA</a></p> <p>This week I was talking to a customer in Germany who had deployed a VSAN stretched cluster within a building. As it was all within a building (extremely low latency) and they preferred to have a very simple operational model they decided not to implement any type of VM/Host rules. By default when a stretched cluster [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/15/disable-vsan-site-locality-in-low-latency-stretched-or-robo-configuration/">Disable VSAN site locality in low latency stretched cluster</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(4205) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16963&c=1465836879' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16963&c=1465836879' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>This week I was talking to a customer in Germany who had deployed a VSAN stretched cluster within a building. As it was all within a building (extremely low latency) and they preferred to have a very simple operational model they decided not to implement any type of VM/Host rules. By default when a stretched cluster is deployed in VSAN (and ROBO uses this workflow as well) then &#8220;site locality&#8221; is implemented for caching. This means that a VM will have its read cache on the host which holds the components in the site where it is located.</p> <p>This is great of course and avoids incurring latency hit for reads. Now in some cases you may not desire this behaviour. For instance in the situation above where there is an extremely low latency connection between the different rooms in the same building. In this case as well because there are no VM/Host rules implemented a VM can freely roam around the cluster. Now when a VM moves between VSAN Fault Domains in this scenario the cache will need to be rewarmed as it only reads locally. Fortunately you can disable this behaviour easily:</p> <pre class="p1" style="padding-left: 30px;"><span class="s1">[root@esxi-01:~] esxcfg-advcfg -g /VSAN/DOMOwnerForceWarmCache</span></pre> <pre class="p1" style="padding-left: 30px;"><span class="s1">Value of DOMOwnerForceWarmCache is 0</span></pre> <pre class="p1" style="padding-left: 30px;"><span class="s1">[root@esxi-01:~] esxcfg-advcfg -s 1 /VSAN/DOMOwnerForceWarmCache</span></pre> <pre class="p1" style="padding-left: 30px;"><span class="s1">Value of DOMOwnerForceWarmCache is 1</span></pre> <p>In a stretched environment you will see that this setting is set to 0 set it to 1 to disable this behaviour. In a ROBO environment VM migrations are uncommon, but if they do happen on a regular basis you may also want to look in to setting this setting.</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/15/disable-vsan-site-locality-in-low-latency-stretched-or-robo-configuration/">Disable VSAN site locality in low latency stretched cluster</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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target='_blank'>Advertise here with BSA</a></p> <p>I was talking to someone before the start of the holiday season about running the Vendor Provider (VP) for VVol as a VM and what the best practices are around that. I was thinking about the implication of the VP not being available and came to the conclusion that when the VP is unavailable a [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/06/where-do-i-run-my-vasa-vendor-provider-for-vvols/">Where do I run my VASA Vendor Provider for VVols?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(5949) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16954&c=2001504727' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16954&c=2001504727' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I was talking to someone before the start of the holiday season about running the Vendor Provider (VP) for VVol as a VM and what the best practices are around that. I was thinking about the implication of the VP not being available and came to the conclusion that when the VP is unavailable a bunch of things stop working out of which &#8220;bind&#8221; is probably most important.</p> <p>The &#8220;bind&#8221; operation is what allows vSphere to access a given Virtual Volume, and this operation is issued during a power-on of a VM. This is how the VVol FAQ describes it:</p> <blockquote><p>When a Virtual Volume is created, it is not immediately accessible for IO. To Access Virtual Volumes, vSphere needs to issue a “Bind” operation to a VASA Provider (VP), which creates IO access point for a Virtual Volume on a Protocol Endpoint (PE) chosen by a VP. A single PE can be the IO access point for multiple Virtual Volumes. “Unbind” Operation will remove this IO access point for a given Virtual Volume.</p></blockquote> <p>This means that when the VP is unavailable, you can&#8217;t power-on VMs at that particular time. For many storage systems that problem is mitigated by having the VP as part of their storage system itself, and of course there is the option to have multiple VPs as part of your solution, either in active/active or in active/standby configuration. In the case of VSAN for instance, each host has a VASA provider out of which one is active and others are standby, if the active fails the standby will take over automatically. So to be clear, it is up to the vendor to decide what type of availability to provide for the VP, some have decided to go for a single instance and rely on vSphere HA to restart the appliance, others have created active/standby etc.</p> <p><img class="" src="http://cormachogan.com/wp-content/uploads/2013/08/vendor-providers.png" alt="" width="650" height="330" /></p> <p>But back to VVols, what if you own a storage system that requires an external VASA VP as a VM?</p> <ul> <li>Run your VP VMs in a management cluster, if the hosts in the &#8220;production&#8221; cluster are impacted and VMs are restarted then at least the VP VMs should be up and running in your management cluster</li> <li>Use multiple VP VMs if and when possible, if active / active or active / standby is supported make sure to run your VPs in that configuration</li> <li>Do not use VVols for the VP itself, you don&#8217;t want to have any (circular) dependency between the availability of the VP and being able to power-on the VP itself</li> <li>If there is no availability story for the VP, depending on the configuration of the appliance vSphere FT should be considered.</li> </ul> <p>One more thing, if you are considering buying new storage, I think one question you definitely need to ask your vendor is what their story is around the VP. Is it a VM or is it part of the storage system itself? Is there an availability story for the VP, and if so is this &#8220;active/active&#8221; or &#8220;active/standby&#8221;? If not, what do they have on their roadmap around this? You are probably also asking yourself what VMware has planned to solve this problem, well there are a couple of things cooking and I can&#8217;t say too much about it. One important effort though is the inclusion of bind/unbind in the T10 SCSI standard, but as you can imagine, those things take time. (Which would allow us to power-on new VMs even when the VP is unavailable as it would be a SCSI command.) Until then, when you design a VVol environment, take the above in to account when it comes to your Vendor Provider aka VP!</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/06/where-do-i-run-my-vasa-vendor-provider-for-vvols/">Where do I run my VASA Vendor Provider for VVols?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16947&c=683025861' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16947&c=683025861' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I received a question last week from a customer who had implemented a stretched VSAN cluster. The Health Check after the implementation indicated that there was an &#8220;issue&#8221; with the MTU configuration. The customer had explained that he had configured an MTU of 9000 between the two data sites and an MTU of (default) 1500 [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/22/jumbo-frames-and-vsan-stretched-cluster-configurations/">Jumbo Frames and VSAN Stretched Cluster configurations</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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The Health Check after the implementation indicated that there was an &#8220;issue&#8221; with the MTU configuration. The customer had explained that he had configured an MTU of 9000 between the two data sites and an MTU of (default) 1500 between data sites and the witness.</p> <p><img src="https://c2.staticflickr.com/6/5626/21640548292_faf47a713e_o.png" alt="" /></p> <p>The question of course was, why the Health Check indicated there was an issue. The problem here is that witness traffic and data in todays version of Virtual SAN use the same VMkernel interface. If the VSAN VMkernel interface on the the &#8220;data&#8221; site is configured for 9000 and one the &#8220;witness&#8221; site is configured for 1500 then there is a mismatch which causes fragmentation etc. This is what the health check calls out. 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Willem showed me a product called AirSembly by the new company he works for called AirVM. I had bumped in to the AirVM folks at VMworld, their booth kinda stood out you can say. Recently AirVM also revealed that [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/18/airsembly-by-airvm-great-interface-for-vcloud-director-and-vcenter-for-sps/">AirSembly by AirVM, great interface for vCloud Director and vCenter for SPs</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(6471) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16941&c=1668141555' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16941&c=1668141555' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>This week I had a conf call with one of my old colleagues Willem van Engeland. Willem showed me a product called AirSembly by the new company he works for called <a href="https://www.airvm.com/">AirVM</a>. I had bumped in to the AirVM folks at VMworld, their booth kinda stood out you can say. Recently AirVM also revealed that they had been selected by VMware to be the <a href="http://www.airvm.com/2015/12/14/vmware-selects-airsembly-as-a-recommended-cloud-management-platform/">preferred cloud management platform for vCloud Air Network</a> partners. All of this made me curious and I figured I would have a quick look at what they have to offer.</p> <p>Willem showed me what they offer, which is basically a cloud management platform for vCloud Director environments. It does a lot of things vCloud Director doesn&#8217;t offer today out of the box, which saves a lot of time and resources as you would normally custom develop this functionality. Here I am talking about for instance a fully customizable HTML5 interface, and a management solution which allows you as a cloud provider to create distributors, the distributors to create partners and the partners to sell to customers. Yes you can have multiple layers, which is a very common model for cloud providers. (Now you have the option to cut out the &#8220;distributor layer&#8221; as AirVM found out this is less common than expected at first.)</p> <p>What I like about the layered approach is that I get to see as a partner what is important to me (same for the provider, customer etc) and aren&#8217;t overwhelmed with details I don&#8217;t care about. For instance as a customer you will want to know what is running in your VDC.</p> <p><img src="https://c1.staticflickr.com/1/715/23745317701_c72ba26e38_z.jpg" alt="" /></p> <p>But as a partner I probably care about other things, things like these:</p> <p><img src="https://c2.staticflickr.com/6/5724/23801743856_7405e3f2e1_z.jpg" alt="" /></p> <p>Now those of course are just two simple examples of what you get with AirSembly. For the vCAN partner it is probably more important to know that there is deep vCloud Director integration. Some of the stats in the AirSembly UI are not even available in the vCloud Director UI itself. On top of leveraging the vCloud Director APIs you can also connect AirSembly to vCenter Server, and they integrate with RabbitMQ. So any changes in your vCloud Director environment will be noticed by AirSembly, and as such AirSembly will always reflect the proper state of the environment.</p> <p>Even more important, AirSembly allows you to basically customize your whole front-end. You can simply define colour schemes and change the fonts through drop downs, you can add custom headers and footers, logos and slogan&#8230; or you can go as far as providing custom CSS and go all-out when it comes to branding. Everything is possible through their interface. It allows you to create a portal that looks and feels like your own website, which is important.</p> <p>It has been a while since I touched vCloud Director, one thing I still clearly remember though&#8230; complexity. That is what I like about AirSembly, it offers a lot of functionality out of the box as a cloud management platform for vCloud Director and vCenter Server, but it doesn&#8217;t feel complex at any point. The different layers for cloud provider, distributor, partner and customer take a while to get used to, but depending on where you sit in the chain you should not as a &#8220;consumer&#8221; ever notice that.</p> <p>I am going to leave it at that for now, mainly because the weekend is coming up and my holiday is about to get started. If you want to know more, have a look at this interview that Jeremy van Doorn did for VMworld TV with AirVM and the demo that was given to Eric Sloof.</p> <p><iframe src="https://www.youtube.com/embed/1RlyU1T6Oi8" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe></p> <p><iframe src="https://www.youtube.com/embed/nF8aLSBfzt0" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe></p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/18/airsembly-by-airvm-great-interface-for-vcloud-director-and-vcenter-for-sps/">AirSembly by AirVM, great interface for vCloud Director and vCenter for SPs</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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"http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } [6]=> array(6) { ["data"]=> string(4) "vsan" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } [7]=> array(6) { ["data"]=> string(7) "vSphere" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["guid"]=> array(1) { [0]=> array(6) { ["data"]=> string(37) "http://www.yellow-bricks.com/?p=16937" ["attribs"]=> array(1) { [""]=> array(1) { ["isPermaLink"]=> string(5) "false" } } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1122) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=536543290' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=536543290' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>On the 15th the VROps Management Pack for VSAN 6.0.3 was released. If you have VROps Standard or higher you can take advantage of this management pack. It is supported for the latest release of VSAN, 6.1, as of this management pack officially. Very useful to find out if there are any anomalies and what [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/17/vsan-vrops-management-pack-version-6-0-3-available/">VSAN VROps Management Pack version 6.0.3 available</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(3613) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=1081207641' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=1081207641' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>On the 15th the <a href="https://solutionexchange.vmware.com/store/products/management-pack-for-storage-devices" target="_blank">VROps Management Pack for VSAN 6.0.3 </a>was released. If you have VROps Standard or higher you can take advantage of this management pack. It is supported for the latest release of VSAN, 6.1, as of this management pack officially. Very useful to find out if there are any anomalies and what the trends are. I&#8217;ve always loved VROps and it just became even more useful to me!</p> <p><img class="aligncenter" src="https://c368768.ssl.cf1.rackcdn.com/product_images/29291/dialog/vsan_troubleshooting6a59e4b513201a8e35a365930fc2200d.png" alt="" /></p> <p>For those who want even more info, there is also a <a href="https://solutionexchange.vmware.com/store/products/vmware-vsan" target="_blank">Log Insight Content Pack for VSAN</a> available, which can give you some great insights on what is going on within your VSAN environment. For instance when there is congestion as shown in the screenshot below, which I <a href="http://cormachogan.com/2015/12/03/a-new-vrealize-pack-for-vsan/" target="_blank">borrowed from Cormac</a>.</p> <p><img class="aligncenter" src="http://cormachogan.com/wp-content/uploads/2015/11/li-congestion-latency.png" alt="" width="649" height="226" /></p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/17/vsan-vrops-management-pack-version-6-0-3-available/">VSAN VROps Management Pack version 6.0.3 available</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16988&c=1669837520' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16988&c=1669837520' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I wrote an article about Datrium DVX when Datrium came out of stealth about 6 months ago. I am not going to rehash that as I think it was pretty clear around what Datrium DVX is. Datrium DVX is a combination of &#8220;host local data services&#8221; and network accessed storage capacity. This basically means that [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/29/datrium-dvx-goes-ga/">Datrium DVX goes GA</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(6060) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16988&c=582738125' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16988&c=582738125' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I wrote an article about <a href="http://www.yellow-bricks.com/2015/07/28/datrium-finally-out-of-stealth-welcome-datrium-dvx/" target="_blank">Datrium DVX</a> when <a href="http://www.datrium.com/" target="_blank">Datrium</a> came out of stealth about 6 months ago. I am not going to rehash that as I think it was pretty clear around what Datrium DVX is. Datrium DVX is a combination of &#8220;host local data services&#8221; and network accessed storage capacity. This basically means that you utilize local flash resources for read caching (deduped before stored on the flash tier), writes will go directly to the &#8220;NetShelf&#8221; as Datrium calls it, which is basically your persistent layer. The write is compressed by the way before it is send to the NetShelf, and on theNetShelf itself there is a also a dedupe process that runs periodically to &#8220;collect garbage&#8221; and optimize the system for capacity.</p> <p><img class="aligncenter" src="http://www.datrium.com/wp-content/uploads/2015/06/Datrium-DVXChart.svg" alt="" width="462" height="370" /></p> <p>I had a chat with the team from Datrium and we spoke about what was new with GA and stuff that I hadn&#8217;t covered yet in my previous article. Some of the facts from that call:</p> <ul> <li>The DVX list price is $125,000. This includes a NetShelf D12X4 appliance and unlimited licenses for DVX Hyperdriver software on vSphere hosts <ul> <li>Servers and SSDs must be purchased and supported independently</li> <li>There currently is a limit of 32 hosts connected to a NetShelf</li> <li>With 32 hosts the expected aggregate is 1m IOPS</li> </ul> </li> <li>The NetShelf D12X4 appliance comes with 48TB raw, or 60TB – 180TB effective capacity at common deduplication and compression rates for Enterprise data (2x-6x) <ul> <li>Expected effective capacity on average is around 125TB</li> </ul> </li> <li>The NetShelf comes in an HA configuration with 2 controllers and mirrored NVRAM, no single point of failure</li> <li>Datrium DVX takes up to 20% of the host CPU resources, but this is the most it will take and only when running at max speed, so typically CPU resources used will be much lower</li> <li>Has &#8220;data locality&#8221;, meaning that when a VM is migrated between hosts than the cache will be read from the &#8220;source&#8221; host to the &#8220;destination&#8221; so that the &#8220;destination&#8221; warms up</li> </ul> <p>I guess that says it all. Well there&#8217;s a bit around support for hypervisors and things like VVols and VAAI. Today Datrium only supports vSphere, and it wasn&#8217;t clear if and when other hypervisors would be supported. When it comes to VAAI it was mentioned that VAAI clones are fully supported as it stands today. On top of that Datrium is also working hard on enabling a VVol capable solution, they have joined the VVol program and are looking forward to release their VVol capable software, I am sure that when they do I will talk to them again.</p> <p>A couple of things are missing in todays offering, which would definitely be nice to have, or in some cases even a must. Native replication and array based snapshots for instance. Today Datrium partners with Zerto, and of course VMware customers can use vSphere Replication for free. Snapshots rely on vSphere today, but there are plans to have them natively on the array at some point. Also, when you run out of capacity and you add a NetShelf, this will become a new mountpoint, it would be nice if this was scale-out, and the Datrium folks agreed but didn&#8217;t commit to anything (of course). Overall I think it is an interesting solution, and with 30 install sites for the beta I think it is safe to say that they will be a player to consider, but only time will tell.</p> <p>Thanks guys for taking the time to brief me.</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/29/datrium-dvx-goes-ga/">Datrium DVX goes GA</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1107) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=433472558' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=433472558' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I was just listening to the VMware earnings call, and needless to say that I was very excited hearing all the great news about Virtual SAN. When I talk to customers this is something that comes up every now and then, they want to know where we stand in the market. I figured I would [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/27/virtual-san-the-leader-in-the-hyper-converged-market/">Virtual SAN, the leader in the hyper-converged market!</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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When I talk to customers this is something that comes up every now and then, they want to know where we stand in the market. I figured I would share what was stated by Carl Eschenbach and Pat Gelsinger at the <a href="http://ir.vmware.com/eventdetail.cfm?EventID=168860" target="_blank">2015 Q4 earnings call</a>:</p> <blockquote> <p class="p p5">Summarizing a few other product areas, our hyper-converged offerings based on VMware Virtual SAN experienced significant traction. Specifically, our Virtual SAN business saw successes across a wide variety of industries, market segments, and geos. In Q4, total VSAN bookings grew nearly 200% year-over-year, and <span style="text-decoration: underline;">customer count has increased to over 3,000</span> versus over 1,000 a year ago. 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(or attend one of the many VMUGs the upcoming months, I will personally be presenting in Newcastle, Johannesburg, Durban, Capetown and Den Bosch)</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/27/virtual-san-the-leader-in-the-hyper-converged-market/">Virtual SAN, the leader in the hyper-converged market!</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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/></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>This is one of those questions that comes up every now and then, I have written about this before, but it never hurts to repeat some of it. The comment I got was around rebuild time of failed drives in VSAN, surely it takes longer than with a &#8220;legacy&#8221; storage system. The answer of course is: it depends (on [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/26/rebuilding-failed-disk-in-vsan-versus-legacy-storage/">Rebuilding failed disk in VSAN versus legacy storage</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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The comment I got was around rebuild time of failed drives in VSAN, surely it takes longer than with a &#8220;legacy&#8221; storage system. The answer of course is: it depends (on many factors).</p> <p>But what does it depend on? Well it depends on what exactly we are talking about, but in general I think the following applies:</p> <p>With VSAN components (copies of objects, in other words copies of data) are placed across multiple hosts, multiple diskgroups and multiple disks. Basically if you have a cluster of lets say 8 hosts with 7 disks each and you have 200 VMs then the data of those 200 VMs will be spread across 8 hosts and 56 disks in total. If one of those 56 disks happens to fail then the data that was stored on that disk would need to be reprotected. That data is coming from the other 7 hosts which is potentially 49 disks in total. You may ask, why not 55 disks? Well because replica copies are never stored on the same hosts for resiliency purposes, look at the diagram below where a single object is split in to 2 data components and a witness, they are all located on different hosts!</p> <p><img src="http://farm8.staticflickr.com/7312/9799202025_90e357f8de.jpg" alt="" /></p> <p>We do not “mirror” disks, we mirror the data itself, and the data can and will be place anywhere. This means that when a failure has occurred of a disk within a diskgroup on a host all remaining disk groups / disk / hosts will be helping to rebuild the impacted data, which is 49 disks potentially. Note that not only will disks and hosts containing impacted objects help rebuilding the data, all 8 hosts and 55 disks will be able to receive the replica data!</p> <p>Now compare this to a RAID set with a spare disk. In the case of a spare disk you have 1 disk which is receiving all the data that is being rebuild. That single disk can only take an X number of IOPS. Lets say it is a really fast disk and it can take 200 IOPS. Compare that to VSAN… Lets say you used really slow disks which only do 75 IOPS… Still that is (potentially) 49 disks x 75 IOPS for reads and 55 disks for writes.</p> <p class="p1"><span class="s1">That is the major difference, we don’t have a single drive as a designated hot spare (or should I say bottleneck?), we have the whole cluster as a hot spare! As such rebuild times when using similar drives should always be faster with VSAN compared to traditional storage. </span></p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/26/rebuilding-failed-disk-in-vsan-versus-legacy-storage/">Rebuilding failed disk in VSAN versus legacy storage</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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"http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["guid"]=> array(1) { [0]=> array(6) { ["data"]=> string(37) "http://www.yellow-bricks.com/?p=16967" ["attribs"]=> array(1) { [""]=> array(1) { ["isPermaLink"]=> string(5) "false" } } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1159) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16967&c=911882702' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16967&c=911882702' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I had a question today around support for SMP-FT in an EMC VPLEX environment. It is well known that SMP-FT isn&#8217;t supported in a stretched VSAN environment, but what about other types of stretched storage? Is that a VSAN specific constraint? (Legacy) FT appears to be supported for VPLEX and other types of stretched storage? SMP-FT is [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/19/smp-ft-and-any-type-of-stretched-storage-support/">SMP-FT and (any type of) stretched storage support</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(3295) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16967&c=211157951' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16967&c=211157951' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I had a question today around support for SMP-FT in an EMC VPLEX environment. It is well known that SMP-FT isn&#8217;t supported in a stretched VSAN environment, but what about other types of stretched storage? Is that a VSAN specific constraint? (Legacy) FT appears to be supported for VPLEX and other types of stretched storage?</p> <p>SMP-FT is not supported in a vSphere Metro Storage Cluster environment either! This has not been qualified yet, I&#8217;ve requested the FT team to at least put it up on the roadmap and document max latency tolerated for these types of environments for SMP-FT just in case someone would want to use it in a campus situations for instance, despite the high bandwidth requirements for SMP-FT. Note that &#8220;legacy FT&#8221; can be used with vMSC environment, but not with VSAN. In order to use legacy FT (single vCPU) you will need to use an advanced VM setting: vm.uselegacyft. 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} ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1171) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16963&c=1134089293' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16963&c=1134089293' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>This week I was talking to a customer in Germany who had deployed a VSAN stretched cluster within a building. As it was all within a building (extremely low latency) and they preferred to have a very simple operational model they decided not to implement any type of VM/Host rules. By default when a stretched cluster [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/15/disable-vsan-site-locality-in-low-latency-stretched-or-robo-configuration/">Disable VSAN site locality in low latency stretched cluster</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(4205) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16963&c=1465836879' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16963&c=1465836879' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>This week I was talking to a customer in Germany who had deployed a VSAN stretched cluster within a building. As it was all within a building (extremely low latency) and they preferred to have a very simple operational model they decided not to implement any type of VM/Host rules. By default when a stretched cluster is deployed in VSAN (and ROBO uses this workflow as well) then &#8220;site locality&#8221; is implemented for caching. This means that a VM will have its read cache on the host which holds the components in the site where it is located.</p> <p>This is great of course and avoids incurring latency hit for reads. Now in some cases you may not desire this behaviour. For instance in the situation above where there is an extremely low latency connection between the different rooms in the same building. In this case as well because there are no VM/Host rules implemented a VM can freely roam around the cluster. Now when a VM moves between VSAN Fault Domains in this scenario the cache will need to be rewarmed as it only reads locally. Fortunately you can disable this behaviour easily:</p> <pre class="p1" style="padding-left: 30px;"><span class="s1">[root@esxi-01:~] esxcfg-advcfg -g /VSAN/DOMOwnerForceWarmCache</span></pre> <pre class="p1" style="padding-left: 30px;"><span class="s1">Value of DOMOwnerForceWarmCache is 0</span></pre> <pre class="p1" style="padding-left: 30px;"><span class="s1">[root@esxi-01:~] esxcfg-advcfg -s 1 /VSAN/DOMOwnerForceWarmCache</span></pre> <pre class="p1" style="padding-left: 30px;"><span class="s1">Value of DOMOwnerForceWarmCache is 1</span></pre> <p>In a stretched environment you will see that this setting is set to 0 set it to 1 to disable this behaviour. In a ROBO environment VM migrations are uncommon, but if they do happen on a regular basis you may also want to look in to setting this setting.</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/15/disable-vsan-site-locality-in-low-latency-stretched-or-robo-configuration/">Disable VSAN site locality in low latency stretched cluster</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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target='_blank'>Advertise here with BSA</a></p> <p>I was talking to someone before the start of the holiday season about running the Vendor Provider (VP) for VVol as a VM and what the best practices are around that. I was thinking about the implication of the VP not being available and came to the conclusion that when the VP is unavailable a [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/06/where-do-i-run-my-vasa-vendor-provider-for-vvols/">Where do I run my VASA Vendor Provider for VVols?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(5949) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16954&c=2001504727' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16954&c=2001504727' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I was talking to someone before the start of the holiday season about running the Vendor Provider (VP) for VVol as a VM and what the best practices are around that. I was thinking about the implication of the VP not being available and came to the conclusion that when the VP is unavailable a bunch of things stop working out of which &#8220;bind&#8221; is probably most important.</p> <p>The &#8220;bind&#8221; operation is what allows vSphere to access a given Virtual Volume, and this operation is issued during a power-on of a VM. This is how the VVol FAQ describes it:</p> <blockquote><p>When a Virtual Volume is created, it is not immediately accessible for IO. To Access Virtual Volumes, vSphere needs to issue a “Bind” operation to a VASA Provider (VP), which creates IO access point for a Virtual Volume on a Protocol Endpoint (PE) chosen by a VP. A single PE can be the IO access point for multiple Virtual Volumes. “Unbind” Operation will remove this IO access point for a given Virtual Volume.</p></blockquote> <p>This means that when the VP is unavailable, you can&#8217;t power-on VMs at that particular time. For many storage systems that problem is mitigated by having the VP as part of their storage system itself, and of course there is the option to have multiple VPs as part of your solution, either in active/active or in active/standby configuration. In the case of VSAN for instance, each host has a VASA provider out of which one is active and others are standby, if the active fails the standby will take over automatically. So to be clear, it is up to the vendor to decide what type of availability to provide for the VP, some have decided to go for a single instance and rely on vSphere HA to restart the appliance, others have created active/standby etc.</p> <p><img class="" src="http://cormachogan.com/wp-content/uploads/2013/08/vendor-providers.png" alt="" width="650" height="330" /></p> <p>But back to VVols, what if you own a storage system that requires an external VASA VP as a VM?</p> <ul> <li>Run your VP VMs in a management cluster, if the hosts in the &#8220;production&#8221; cluster are impacted and VMs are restarted then at least the VP VMs should be up and running in your management cluster</li> <li>Use multiple VP VMs if and when possible, if active / active or active / standby is supported make sure to run your VPs in that configuration</li> <li>Do not use VVols for the VP itself, you don&#8217;t want to have any (circular) dependency between the availability of the VP and being able to power-on the VP itself</li> <li>If there is no availability story for the VP, depending on the configuration of the appliance vSphere FT should be considered.</li> </ul> <p>One more thing, if you are considering buying new storage, I think one question you definitely need to ask your vendor is what their story is around the VP. Is it a VM or is it part of the storage system itself? Is there an availability story for the VP, and if so is this &#8220;active/active&#8221; or &#8220;active/standby&#8221;? If not, what do they have on their roadmap around this? You are probably also asking yourself what VMware has planned to solve this problem, well there are a couple of things cooking and I can&#8217;t say too much about it. One important effort though is the inclusion of bind/unbind in the T10 SCSI standard, but as you can imagine, those things take time. (Which would allow us to power-on new VMs even when the VP is unavailable as it would be a SCSI command.) Until then, when you design a VVol environment, take the above in to account when it comes to your Vendor Provider aka VP!</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/06/where-do-i-run-my-vasa-vendor-provider-for-vvols/">Where do I run my VASA Vendor Provider for VVols?</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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"http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1159) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16947&c=683025861' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16947&c=683025861' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I received a question last week from a customer who had implemented a stretched VSAN cluster. The Health Check after the implementation indicated that there was an &#8220;issue&#8221; with the MTU configuration. The customer had explained that he had configured an MTU of 9000 between the two data sites and an MTU of (default) 1500 [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/22/jumbo-frames-and-vsan-stretched-cluster-configurations/">Jumbo Frames and VSAN Stretched Cluster configurations</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(3358) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16947&c=1039468091' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16947&c=1039468091' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I received a question last week from a customer who had implemented a stretched VSAN cluster. The Health Check after the implementation indicated that there was an &#8220;issue&#8221; with the MTU configuration. The customer had explained that he had configured an MTU of 9000 between the two data sites and an MTU of (default) 1500 between data sites and the witness.</p> <p><img src="https://c2.staticflickr.com/6/5626/21640548292_faf47a713e_o.png" alt="" /></p> <p>The question of course was, why the Health Check indicated there was an issue. The problem here is that witness traffic and data in todays version of Virtual SAN use the same VMkernel interface. If the VSAN VMkernel interface on the the &#8220;data&#8221; site is configured for 9000 and one the &#8220;witness&#8221; site is configured for 1500 then there is a mismatch which causes fragmentation etc. This is what the health check calls out. 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["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["guid"]=> array(1) { [0]=> array(6) { ["data"]=> string(37) "http://www.yellow-bricks.com/?p=16941" ["attribs"]=> array(1) { [""]=> array(1) { ["isPermaLink"]=> string(5) "false" } } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1158) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16941&c=733944081' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16941&c=733944081' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>This week I had a conf call with one of my old colleagues Willem van Engeland. Willem showed me a product called AirSembly by the new company he works for called AirVM. I had bumped in to the AirVM folks at VMworld, their booth kinda stood out you can say. Recently AirVM also revealed that [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/18/airsembly-by-airvm-great-interface-for-vcloud-director-and-vcenter-for-sps/">AirSembly by AirVM, great interface for vCloud Director and vCenter for SPs</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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Willem showed me a product called AirSembly by the new company he works for called <a href="https://www.airvm.com/">AirVM</a>. I had bumped in to the AirVM folks at VMworld, their booth kinda stood out you can say. Recently AirVM also revealed that they had been selected by VMware to be the <a href="http://www.airvm.com/2015/12/14/vmware-selects-airsembly-as-a-recommended-cloud-management-platform/">preferred cloud management platform for vCloud Air Network</a> partners. All of this made me curious and I figured I would have a quick look at what they have to offer.</p> <p>Willem showed me what they offer, which is basically a cloud management platform for vCloud Director environments. It does a lot of things vCloud Director doesn&#8217;t offer today out of the box, which saves a lot of time and resources as you would normally custom develop this functionality. Here I am talking about for instance a fully customizable HTML5 interface, and a management solution which allows you as a cloud provider to create distributors, the distributors to create partners and the partners to sell to customers. Yes you can have multiple layers, which is a very common model for cloud providers. (Now you have the option to cut out the &#8220;distributor layer&#8221; as AirVM found out this is less common than expected at first.)</p> <p>What I like about the layered approach is that I get to see as a partner what is important to me (same for the provider, customer etc) and aren&#8217;t overwhelmed with details I don&#8217;t care about. For instance as a customer you will want to know what is running in your VDC.</p> <p><img src="https://c1.staticflickr.com/1/715/23745317701_c72ba26e38_z.jpg" alt="" /></p> <p>But as a partner I probably care about other things, things like these:</p> <p><img src="https://c2.staticflickr.com/6/5724/23801743856_7405e3f2e1_z.jpg" alt="" /></p> <p>Now those of course are just two simple examples of what you get with AirSembly. For the vCAN partner it is probably more important to know that there is deep vCloud Director integration. Some of the stats in the AirSembly UI are not even available in the vCloud Director UI itself. On top of leveraging the vCloud Director APIs you can also connect AirSembly to vCenter Server, and they integrate with RabbitMQ. So any changes in your vCloud Director environment will be noticed by AirSembly, and as such AirSembly will always reflect the proper state of the environment.</p> <p>Even more important, AirSembly allows you to basically customize your whole front-end. You can simply define colour schemes and change the fonts through drop downs, you can add custom headers and footers, logos and slogan&#8230; or you can go as far as providing custom CSS and go all-out when it comes to branding. Everything is possible through their interface. It allows you to create a portal that looks and feels like your own website, which is important.</p> <p>It has been a while since I touched vCloud Director, one thing I still clearly remember though&#8230; complexity. That is what I like about AirSembly, it offers a lot of functionality out of the box as a cloud management platform for vCloud Director and vCenter Server, but it doesn&#8217;t feel complex at any point. The different layers for cloud provider, distributor, partner and customer take a while to get used to, but depending on where you sit in the chain you should not as a &#8220;consumer&#8221; ever notice that.</p> <p>I am going to leave it at that for now, mainly because the weekend is coming up and my holiday is about to get started. If you want to know more, have a look at this interview that Jeremy van Doorn did for VMworld TV with AirVM and the demo that was given to Eric Sloof.</p> <p><iframe src="https://www.youtube.com/embed/1RlyU1T6Oi8" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe></p> <p><iframe src="https://www.youtube.com/embed/nF8aLSBfzt0" width="560" height="315" frameborder="0" allowfullscreen="allowfullscreen"></iframe></p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/18/airsembly-by-airvm-great-interface-for-vcloud-director-and-vcenter-for-sps/">AirSembly by AirVM, great interface for vCloud Director and vCenter for SPs</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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{ ["data"]=> string(37) "http://www.yellow-bricks.com/?p=16937" ["attribs"]=> array(1) { [""]=> array(1) { ["isPermaLink"]=> string(5) "false" } } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1122) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=536543290' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=536543290' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>On the 15th the VROps Management Pack for VSAN 6.0.3 was released. If you have VROps Standard or higher you can take advantage of this management pack. It is supported for the latest release of VSAN, 6.1, as of this management pack officially. Very useful to find out if there are any anomalies and what [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/17/vsan-vrops-management-pack-version-6-0-3-available/">VSAN VROps Management Pack version 6.0.3 available</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(3613) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=1081207641' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16937&c=1081207641' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>On the 15th the <a href="https://solutionexchange.vmware.com/store/products/management-pack-for-storage-devices" target="_blank">VROps Management Pack for VSAN 6.0.3 </a>was released. If you have VROps Standard or higher you can take advantage of this management pack. It is supported for the latest release of VSAN, 6.1, as of this management pack officially. Very useful to find out if there are any anomalies and what the trends are. I&#8217;ve always loved VROps and it just became even more useful to me!</p> <p><img class="aligncenter" src="https://c368768.ssl.cf1.rackcdn.com/product_images/29291/dialog/vsan_troubleshooting6a59e4b513201a8e35a365930fc2200d.png" alt="" /></p> <p>For those who want even more info, there is also a <a href="https://solutionexchange.vmware.com/store/products/vmware-vsan" target="_blank">Log Insight Content Pack for VSAN</a> available, which can give you some great insights on what is going on within your VSAN environment. For instance when there is congestion as shown in the screenshot below, which I <a href="http://cormachogan.com/2015/12/03/a-new-vrealize-pack-for-vsan/" target="_blank">borrowed from Cormac</a>.</p> <p><img class="aligncenter" src="http://cormachogan.com/wp-content/uploads/2015/11/li-congestion-latency.png" alt="" width="649" height="226" /></p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2015/12/17/vsan-vrops-management-pack-version-6-0-3-available/">VSAN VROps Management Pack version 6.0.3 available</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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with BSA</a></p> <p>I wrote an article about Datrium DVX when Datrium came out of stealth about 6 months ago. I am not going to rehash that as I think it was pretty clear around what Datrium DVX is. Datrium DVX is a combination of &#8220;host local data services&#8221; and network accessed storage capacity. This basically means that [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/29/datrium-dvx-goes-ga/">Datrium DVX goes GA</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(6060) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16988&c=582738125' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16988&c=582738125' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I wrote an article about <a href="http://www.yellow-bricks.com/2015/07/28/datrium-finally-out-of-stealth-welcome-datrium-dvx/" target="_blank">Datrium DVX</a> when <a href="http://www.datrium.com/" target="_blank">Datrium</a> came out of stealth about 6 months ago. I am not going to rehash that as I think it was pretty clear around what Datrium DVX is. Datrium DVX is a combination of &#8220;host local data services&#8221; and network accessed storage capacity. This basically means that you utilize local flash resources for read caching (deduped before stored on the flash tier), writes will go directly to the &#8220;NetShelf&#8221; as Datrium calls it, which is basically your persistent layer. The write is compressed by the way before it is send to the NetShelf, and on theNetShelf itself there is a also a dedupe process that runs periodically to &#8220;collect garbage&#8221; and optimize the system for capacity.</p> <p><img class="aligncenter" src="http://www.datrium.com/wp-content/uploads/2015/06/Datrium-DVXChart.svg" alt="" width="462" height="370" /></p> <p>I had a chat with the team from Datrium and we spoke about what was new with GA and stuff that I hadn&#8217;t covered yet in my previous article. Some of the facts from that call:</p> <ul> <li>The DVX list price is $125,000. This includes a NetShelf D12X4 appliance and unlimited licenses for DVX Hyperdriver software on vSphere hosts <ul> <li>Servers and SSDs must be purchased and supported independently</li> <li>There currently is a limit of 32 hosts connected to a NetShelf</li> <li>With 32 hosts the expected aggregate is 1m IOPS</li> </ul> </li> <li>The NetShelf D12X4 appliance comes with 48TB raw, or 60TB – 180TB effective capacity at common deduplication and compression rates for Enterprise data (2x-6x) <ul> <li>Expected effective capacity on average is around 125TB</li> </ul> </li> <li>The NetShelf comes in an HA configuration with 2 controllers and mirrored NVRAM, no single point of failure</li> <li>Datrium DVX takes up to 20% of the host CPU resources, but this is the most it will take and only when running at max speed, so typically CPU resources used will be much lower</li> <li>Has &#8220;data locality&#8221;, meaning that when a VM is migrated between hosts than the cache will be read from the &#8220;source&#8221; host to the &#8220;destination&#8221; so that the &#8220;destination&#8221; warms up</li> </ul> <p>I guess that says it all. Well there&#8217;s a bit around support for hypervisors and things like VVols and VAAI. Today Datrium only supports vSphere, and it wasn&#8217;t clear if and when other hypervisors would be supported. When it comes to VAAI it was mentioned that VAAI clones are fully supported as it stands today. On top of that Datrium is also working hard on enabling a VVol capable solution, they have joined the VVol program and are looking forward to release their VVol capable software, I am sure that when they do I will talk to them again.</p> <p>A couple of things are missing in todays offering, which would definitely be nice to have, or in some cases even a must. Native replication and array based snapshots for instance. Today Datrium partners with Zerto, and of course VMware customers can use vSphere Replication for free. Snapshots rely on vSphere today, but there are plans to have them natively on the array at some point. Also, when you run out of capacity and you add a NetShelf, this will become a new mountpoint, it would be nice if this was scale-out, and the Datrium folks agreed but didn&#8217;t commit to anything (of course). Overall I think it is an interesting solution, and with 30 install sites for the beta I think it is safe to say that they will be a player to consider, but only time will tell.</p> <p>Thanks guys for taking the time to brief me.</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/29/datrium-dvx-goes-ga/">Datrium DVX goes GA</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } ["description"]=> array(1) { [0]=> array(6) { ["data"]=> string(1107) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=433472558' target='_blank' rel='nofollow'><br /> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=433472558' border='0' alt='' /></a></p> <p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p> <p>I was just listening to the VMware earnings call, and needless to say that I was very excited hearing all the great news about Virtual SAN. When I talk to customers this is something that comes up every now and then, they want to know where we stand in the market. I figured I would [&#8230;]</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/27/virtual-san-the-leader-in-the-hyper-converged-market/">Virtual SAN, the leader in the hyper-converged market!</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. Follow me on twitter - <a href="http://twitter.com/DuncanYB">@DuncanYB.</a></p> <p></a></p> " ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/dc/elements/1.1/"]=> array(1) { ["creator"]=> array(1) { [0]=> array(6) { ["data"]=> string(13) "Duncan Epping" ["attribs"]=> array(0) { } ["xml_base"]=> string(0) "" ["xml_base_explicit"]=> bool(false) ["xml_lang"]=> string(0) "" ["xmlns"]=> array(9) { ["content"]=> string(40) "http://purl.org/rss/1.0/modules/content/" ["wfw"]=> string(36) "http://wellformedweb.org/CommentAPI/" ["dc"]=> string(32) "http://purl.org/dc/elements/1.1/" ["atom"]=> string(27) "http://www.w3.org/2005/Atom" ["sy"]=> string(44) "http://purl.org/rss/1.0/modules/syndication/" ["slash"]=> string(38) "http://purl.org/rss/1.0/modules/slash/" ["creativeCommons"]=> string(52) "http://backend.userland.com/creativeCommonsRssModule" ["feedburner"]=> string(42) "http://rssnamespace.org/feedburner/ext/1.0" ["atom10"]=> string(27) "http://www.w3.org/2005/Atom" } } } } ["http://purl.org/rss/1.0/modules/content/"]=> array(1) { ["encoded"]=> array(1) { [0]=> array(6) { ["data"]=> string(4194) "<p><a href='http://rss.buysellads.com/click.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=487404925' target='_blank' rel='nofollow'> <img src='http://rss.buysellads.com/img.php?z=1281483&k=97a1aa732ca094e7845b7a6467d0d55c&a=16981&c=487404925' border='0' alt='' /></a></p><p><a href='http://buysellads.com/buy/sitedetails/pubkey/97a1aa732ca094e7845b7a6467d0d55c/zone/1281483' target='_blank'>Advertise here with BSA</a></p><br /><p>I was just listening to the VMware earnings call, and needless to say that I was very excited hearing all the great news about Virtual SAN. When I talk to customers this is something that comes up every now and then, they want to know where we stand in the market. I figured I would share what was stated by Carl Eschenbach and Pat Gelsinger at the <a href="http://ir.vmware.com/eventdetail.cfm?EventID=168860" target="_blank">2015 Q4 earnings call</a>:</p> <blockquote> <p class="p p5">Summarizing a few other product areas, our hyper-converged offerings based on VMware Virtual SAN experienced significant traction. Specifically, our Virtual SAN business saw successes across a wide variety of industries, market segments, and geos. In Q4, total VSAN bookings grew nearly 200% year-over-year, and <span style="text-decoration: underline;">customer count has increased to over 3,000</span> versus over 1,000 a year ago. We are now well over $100 million annual run rate per total bookings.</p> <p class="p p5">With our next release of VSAN in Q1, we expect our momentum to build given the powerful new enterprise capabilities, the product brings to market. Taking into account, the hardware associated with running the Virtual SAN software and our current booking to run rate, <span style="text-decoration: underline;">we believe we are the industry leader</span> in the hyper-converged offerings measured both by software and as an appliance.</p> </blockquote> <p>And the best is yet to come&#8230; New version is around the corner, and I can&#8217;t wait for it to be released. Make sure to <a href="http://www.vmware.com/digitalenterprise?src=sc_569fec388f2c9&amp;cid=70134000000Nz2D" target="_blank">sign up for the launch events</a>! (or attend one of the many VMUGs the upcoming months, I will personally be presenting in Newcastle, Johannesburg, Durban, Capetown and Den Bosch)</p> <p>"<a rel="nofollow" href="http://www.yellow-bricks.com/2016/01/27/virtual-san-the-leader-in-the-hyper-converged-market/">Virtual SAN, the leader in the hyper-converged market!</a>" originally appeared on <a href="http://www.yellow-bricks.com">Yellow-Bricks.com</a>. 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