tag:blogger.com,1999:blog-71189715802026827782024-03-05T12:07:07.883+05:30Proven PracticeVirtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.comBlogger13125tag:blogger.com,1999:blog-7118971580202682778.post-5912367114234225392009-06-20T00:25:00.003+05:302009-06-20T00:36:39.026+05:30vSphere 4 Editions: Core PlatformWell folks last night I wrote a post about the insight out of the ESX and VC communications. Now I thought let me also put some commercial stuff which will help people to differentiate in between the various flavors of ESX.<br /><br />Can we call it as flavours... well if you ask a Open Source freak and geek you will get the same answer.<br /><br />So for me all of the different ESX availability package is something like flavors of it.<br /><br />Now let me come up with the original topic.<br /><br />So, I have seen people are very confused about the licensing package in between the various different bottle. Basically Vmware has divided the packaging of their into four flavor now with this new release of vSphere 4.0. Those are as below:<br /><br />1. Standard<br />2. Advanced<br />3. Enterprise<br />4. Enterprise Plus<br /><br /><br />Well there are differentiation in between these packaging. Better if you guys can look at the below snap which talked about the differentiation in between the various packaging.<br /><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja5mWIjOVx5HKNChGU58ILZcRHSCYvdqqcg_QSFcw3_s_9BVzz4dzHv12MUcNAyhyphenhyphenoEYBvE0uFMVZijBDXWXxqDbvYs8vPB2NoI0XbvEMdW0WMs8JcRBwoG_k7oS1zIvnhDVMKsCSIePbv/s1600-h/core.jpg"><img style="cursor: pointer; width: 400px; height: 229px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEja5mWIjOVx5HKNChGU58ILZcRHSCYvdqqcg_QSFcw3_s_9BVzz4dzHv12MUcNAyhyphenhyphenoEYBvE0uFMVZijBDXWXxqDbvYs8vPB2NoI0XbvEMdW0WMs8JcRBwoG_k7oS1zIvnhDVMKsCSIePbv/s400/core.jpg" alt="" id="BLOGGER_PHOTO_ID_5349116204912250914" border="0" /></a><br /><br /><br />So this talked about the Enterprise Plus too (a new packaged baby). Cool features Vmware added to this brunch are something like this:<br /><br />> Host Profiles<br />> DVS (Distributed Virtual Switch)<br />> vShield Zones<br />> Vmware Data Recovery<br />> Thin Provisioning<br /><br /><br />So now people has a full plate to grasp. Guys pleas hurry. Offer valid till stock lasts. :)Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com2tag:blogger.com,1999:blog-7118971580202682778.post-30889553595756827992009-06-19T01:34:00.006+05:302009-06-19T01:56:28.275+05:30Network Analysis of ESX to Virtual Center CommunicationsWell Well Well !!!!!
<br />
<br />Guys am back from a long vacation (well to me the vacation is the packaging a new thing). Well we can talk about my next venture definitely some time.
<br />
<br />Now people were asking me what are you doing these days and I said folks gimme some time so that I can come up with the best shot as usual.
<br />
<br />Now I thought letz post this twist. I was bogged down with this since a long time and now got all the big shots in my hand.
<br />
<br />Well sorry about a late post. I was completely busy with my new packaging and product and also with the vCenter Orchestrator training.
<br />
<br />Now let me start on this. This is pretty big one but a cool stuff.
<br />
<br />Issue is as below:
<br />****************
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name="Bibliography"> <w:lsdexception locked="false" priority="39" qformat="true" name="TOC Heading"> </w:LatentStyles> </xml><![endif]--><style> <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:roman; mso-font-pitch:variable; mso-font-signature:-1610611985 1107304683 0 0 159 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin:0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-fareast-font-family:Calibri; mso-bidi-font-family:"Times New Roman";} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt; mso-ascii-font-family:Calibri; mso-fareast-font-family:Calibri; mso-hansi-font-family:Calibri;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in; mso-header-margin:.5in; mso-footer-margin:.5in; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} </style> <![endif]--><span style=";font-family:";font-size:100%;" >Intermittent ESX h</span><span style=";font-family:";font-size:100%;" >ost disconnect alarms from the Virtual Center. Typical disconnect/reconnect times are less than 5 minutes</span><span style=";font-family:";font-size:10;" ><span style="font-size:100%;">.</span>
<br /></span>
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<br />Action Plan Taken as below:
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<br />Verified/Validate all physical network connections have specific speed/duplex settings. Verified physical switch ports are not showing signs of errors. Verified utilization of switch ports are below maximums. Virtual Center management configuration is per specification. ESX Host servers are configured to matching specifications. Network trace captures have been collected and analyzed.
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<br />
<br />Action needed finally:
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<br />Need to answer the questions below surrounding proper application responses, network transmission patterns, and general what the network patterns should be, and how the disconnect alarms are triggered.
<br />
<br />
<br />Open Questions:
<br />***************
<br />1. How exactly does the ESX Host determine that it is no longer communicating with the VC server?
<br />2. What is the exact process that restarts ‘hostd’ or other services to re-establish ESX to VC communications?
<br />3. What is the timeline of ESX Host determining there is an issue and the restart of the ‘hostd’ process to re-establish VC communications?
<br />4. What is the normal timeline for VC to ESX Host heartbeats?
<br />5. What is the normal timeline for ESX to VC Heartbeats?
<br />6. Why is there a small and large UDP 902 packet from each ESX host?
<br />7. Why is the small UDP 902 packet always 71 bytes?
<br />8. Why is there variation in the order of the large/small pattern?
<br />9. Why do different ESX hosts use a different large UDP 902 size?
<br />10. Why does the size of the large UDP 902 packet for a given ESX host change?
<br />11. Does the TCP 902 traffic from the VC server play any role in the hostd restart?
<br />12. Why do we see gaps as long as 3,384 seconds with no VC to ESX TCP 902 traffic?
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<br />
<br />Backup Information provided on the next few pages showing the analysis of the network captures.
<br />
<br />
<br />
<br />The two baseline traces of “normal ESX traffic” provided some interesting data for consideration.
<br />
<br />Trace 4506 A:
<br />• 2-hour trace taken on 4/24 from 8:50 AM to 10:50 AM
<br />• Contains UDP/TCP 902 traffic for 11 ESX hosts
<br />
<br />Trace 4506 B:
<br />• 2-hour trace taken on 4/24 from 8:50 AM to 10:50 AM
<br />• Contains UDP/TCP 902 traffic for 8 ESX hosts
<br />
<br />Here is a summary of the UDP/TCP 902 characteristics seen in these baseline traces, sorted by ESX host IP address:
<br />
<br />19 ESX hosts were seen in the two trace files as expected:
<br />
<br />
<br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv2hyphenhyphenoEGSfHXMn6PptyrpBwUma4867m3q-xi5gnkfEQKFgM_nafnDg4hHpRrySIE9ffpvSSnBtXDCtUpwroRoH8K1o_1nAvnsCoB034GmRNmjaYDTTH_jQjRhUoTOUrAIguTvsG8mKoMT-/s1600-h/trace.jpg"><img style="cursor: pointer; width: 400px; height: 190px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjv2hyphenhyphenoEGSfHXMn6PptyrpBwUma4867m3q-xi5gnkfEQKFgM_nafnDg4hHpRrySIE9ffpvSSnBtXDCtUpwroRoH8K1o_1nAvnsCoB034GmRNmjaYDTTH_jQjRhUoTOUrAIguTvsG8mKoMT-/s400/trace.jpg" alt="" id="BLOGGER_PHOTO_ID_5348764097935651218" border="0" /></a>
<br />
<br />
<br />
<br />Here are some observations for the UDP 902 traffic:
<br />
<br />• The UDP 902 traffic is one-way from the ESX host to the VC server as expected
<br />• The delta time between UDP 902 heartbeats is very consistent with no gaps found in either trace file
<br />• The minimum delta is consistently 10.0 seconds and the maximum observed delta was 10.9 seconds
<br />• Each ESX host sends UDP 902 packets with the same two sizes, a large packet and a small packet
<br />• The small UDP 902 packet was always 71 bytes for all 19 ESX hosts
<br />• The large UDP 902 packet varies from 320 bytes minimum to 1,490 bytes maximum, but each host only uses one large size in these traces
<br />• The typical pattern is to alternate large and small UDP 902 packets, but we do see some exceptions as shown below:
<br />
<br />Note the double small and double large UDP 902 packets highlighted below:
<br />
<br />
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<br />
<br />
<br />Here are some follow-up questions for the UDP 902 traffic:
<br />
<br />• Why is there a small and large packet from each ESX host?
<br />• Why is the small packet always 71 bytes?
<br />• Why is there variation in the order of the large/small pattern?
<br />• Why do different ESX hosts use a different large size?
<br />
<br />
<br />
<br />For the earlier trace with the ESX host disconnect, we see an interesting pattern of UDP 902 packet sizes:
<br />
<br />• For 1,910 seconds from the start of the trace to the gap in UDP 902 traffic, we see a pattern of 71 bytes / 75 bytes
<br />• For 411 seconds during the gap we see no UDP 902 traffic
<br />• For 265 seconds just after the gap, we see a pattern of 71 bytes / 125 bytes
<br />• For 1,015 seconds to the end of the trace, we see a pattern of 71 bytes / 190 bytes
<br />
<br />The baseline trace A shows this ESX host sending a pattern of 71 bytes / 710 bytes. We should try to understand the reason for the different sizes.
<br />
<br />Note the changes in UDP 902 packet sizes around the gap in traffic:
<br />
<br />
<br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhl-ef-eMxZYyz7ouEkja1SFZHjstrYvOEjcGbzAoquTRgmg0-JqyLGYdtqtO49pPFvpldGj5tGmP2b_7DZeTD-ukEIeMg6MCqnoqBog35toINIy_BRUBTqQr4oiSjinURpMzIN15QQPa93/s1600-h/2.jpg"><img style="cursor: pointer; width: 400px; height: 144px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhl-ef-eMxZYyz7ouEkja1SFZHjstrYvOEjcGbzAoquTRgmg0-JqyLGYdtqtO49pPFvpldGj5tGmP2b_7DZeTD-ukEIeMg6MCqnoqBog35toINIy_BRUBTqQr4oiSjinURpMzIN15QQPa93/s400/2.jpg" alt="" id="BLOGGER_PHOTO_ID_5348765502273312754" border="0" /></a>
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<br />Here are some observations for the TCP 902 traffic:
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<br />• The TCP 902 traffic is initiated by the VC server and is bi-directional as expected
<br />• The number of TCP 902 connections per ESX host varies from 2 to 8 during the 2-hour trace
<br />• There is a wide variation of packets and bytes per ESX host
<br />• There are large time gaps (“max delta” on chart) with no TCP 902 traffic from the VC server
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<br />Here are some follow-up questions for the TCP 902 traffic:
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<br />• In the earlier “ESX host disconnect” trace, there was a ~310 second gap from the last VC server TCP 902 packet and the syslog message showing a hostd restart
<br />• If the absence of TCP 902 traffic is triggering the hostd restart, the timeout value should be less than 310 seconds
<br />• Note that during the baseline traces, every ESX host had gaps larger than 310 seconds with no triggered hostd restart ß Max gap was 3,384 seconds
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<br />We should try to understand how hostd decides to trigger a service restart. The baseline traces make it hard to see how the TCP 902 traffic could be the trigger.
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<br />Now this is the time to answer these questions. Look below for the answers.
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<br />1. How exactly does the ESX Host determine that it is no longer communicating with the VC server?
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<br />Ans. When the ESX Host does not respond back within ~20 seconds from the VC initiated Hostsync process.
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<br />2. What is the exact process that restarts 'hostd' or other services to re-establish ESX to VC communications?
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<br />Ans. The vmware-watchdog process.
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<br />3. What is the timeline of ESX Host determining there is an issue and the restart of the 'hostd' process to re-establish VC communications?
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<br />Ans. It checks every minute for hostd to be running, -u 60, and if it finds that it's not running after 5 failed checks, -q 5, it will restart hostd.
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<br />4. What is the normal timeline for VC to ESX Host heartbeats?
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<br />Ans. Heartbeat is initiated from the ESX Host.
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<br />5. What is the normal timeline for ESX to VC Heartbeats?
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<br />Ans. Every 10 seconds.
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<br />6. Why is there a small and large UDP 902 packet from each ESX host?
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<br />Ans. The message sent to VC from vpxa is a serialization of VpxHeartbeatMsg object. However, it's size depends on the quick status size. In the smallest situation, no quick status needs to be sent. The quick status depends on the machine status such as HA.
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<br />7. Why is the small UDP 902 packet always 71 bytes?
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<br />Ans. See answer to 6 above.
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<br />8. Why is there variation in the order of the large/small pattern?
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<br />Ans. Depends on running time status of ESX. In case a host keeps adding new VMs or removing new VMs, it will have more status data.
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<br />9. Why do different ESX hosts use a different large UDP 902 size?
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<br />Ans. It depends on running state of the ESX host.
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<br />10. Why does the size of the large UDP 902 packet for a given ESX host change?
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<br />Ans. It depends on running state of the ESX host.
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<br />11. Does the TCP 902 traffic from the VC server play any role in the hostd restart?
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<br />Ans. TCP traffic from VC is used to transport remote RDP call, (in our term, VMOMI call). It does not play a role.
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<br />12. Why do we see gaps as long as 3,384 seconds with no VC to ESX TCP 902 traffic?
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<br />Ans. When ESX has no status change for example, all VMs are powered off, and no status change on ESX, (both Host or VMs), there is no sync needed between VC and ESX. The only traffic will be udp traffic to VC server to indicate that the Host is alive.
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<br />Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com2tag:blogger.com,1999:blog-7118971580202682778.post-48474882563349508322009-05-18T19:21:00.003+05:302009-05-18T19:31:01.850+05:30A few words about a small baby from Microsoft - Hyper-VFolks,<br /><br />Since a long time I was thinking of doing something different. Now this is the time I thought the different that would be best from my side as a versatile attempt is to write something on Microsoft Hyper-V.<br /><br />So lets look at it how it is making progress and a small intro.<br /><br /><p class="cueParagraph">Microsoft Hyper-V Server 2008 provides a simplified, reliable, and optimized virtualization solution, enabling improved server utilization and reduced costs. Since Hyper-V Server is a dedicated stand-alone product, which contains only the Windows Hypervisor, Windows Server driver model and virtualization components, it provides a small footprint and minimal overhead. It easily plugs into customers’ existing IT environments, leveraging their existing patching, provisioning, management, support tools, processes, and skills.</p><p class="cueParagraph"><br /></p><p class="cueParagraph">IT Pros can easily to leverage their existing knowledge and skills with Microsoft virtualization products, as well as the collective knowledge of the community, minimizing any learning curve. In addition, with Microsoft providing comprehensive support for Microsoft applications and heterogeneous guest operating systems, customers can virtualize with confidence and peace of mind.</p><p class="cueParagraph"><br /></p><div class="cueSection formatHighlightBox"> <h3 class="cueSectionTitle">Key Benefits</h3> <div class="cueListContainer"> <ul class="cueUnorderedList"><li class="cueListItem"> <p class="cueParagraph">Improved server utilization</p> </li><li class="cueListItem"> <p class="cueParagraph">Small footprint</p> </li><li class="cueListItem"> <p class="cueParagraph">Minimal overhead</p></li></ul><br /><h3 style="font-weight: normal; font-style: italic;" class="cueSectionTitle">When to Use Hyper-V Server 2008</h3> <p class="cueParagraph">Microsoft Hyper-V Server 2008 is a great choice for customers who want a basic and simplified virtualization solution for consolidating servers as well as for development and test environments. Hyper-V Server 2008 only offers the most basic of virtualization features, making it ideal for:</p> <div class="cueListContainer"> <ul class="cueUnorderedList"><li class="cueListItem"> <p class="cueParagraph">Test and Development</p> </li><li class="cueListItem"> <p class="cueParagraph">Basic Server Consolidation</p> </li><li class="cueListItem"> <p class="cueParagraph">Branch Office Consolidation</p> </li><li class="cueListItem"> <p class="cueParagraph">Hosted Desktop Virtualization (VDI)</p></li></ul></div> <div class="cueSection"> <p class="cueParagraph">Customers who require richer and more robust virtualization features, such as Quick Migration, multi-site clustering, large memory support (greater than 32 GB of RAM), and more than four processors on the host server, should use <a title="Windows Server 2008" href="http://www.microsoft.com/windowsserver2008/">Windows Server 2008</a>. Windows Server 2008 provides business continuity, disaster recovery, greater scalability for consolidating large workloads, and flexible and cost-effective virtualization rights (one free virtual instance for Standard Edition, four free virtual instances for Enterprise Editions, and unlimited virtual instances for Datacenter Edition with the purchase of a license of Windows Server 2008).</p> <p class="cueParagraph">The following table outlines which Hyper-V–enabled product would suit your needs:</p></div><br /><table class="cueMultiUseTable"> <tbody> <tr> <th> <p class="cueParagraph">Virtualization Needs</p></th> <th> <p class="cueParagraph">Microsoft Hyper-V Server 2008</p></th> <th> <p class="cueParagraph">Windows Server 2008 Standard</p></th> <th> <p class="cueParagraph">Windows Server 2008 Enterprise</p></th> <th> <p class="cueParagraph">Windows Server 2008 Datacenter</p></th></tr> <tr class="cueTableRowOdd"> <td> <p class="cueParagraph">Server Consolidation</p></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowEven"> <td> <p class="cueParagraph">Test and Development</p></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowOdd"> <td> <p class="cueParagraph">Mixed OS Virtualization (Linux and Windows)</p></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowEven"> <td> <p class="cueParagraph">Local Graphical User Interface</p></td> <td><br /></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowOdd"> <td> <p class="cueParagraph">High Availability—Clustering</p></td> <td><br /></td> <td><br /></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowEven"> <td> <p class="cueParagraph">Quick Migration</p></td> <td><br /></td> <td><br /></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowOdd"> <td> <p class="cueParagraph">Large Memory Support (Host OS) > 32 GB RAM</p></td> <td><br /></td> <td><br /></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowEven"> <td> <p class="cueParagraph">Support for > 4 Processors (Host OS)</p></td> <td><br /></td> <td><br /></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowOdd"> <td> <p class="cueParagraph">Ability to Add Additional Server Roles</p></td> <td><br /></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td> <td> <div class="cueImageBlock textAlignCenter"><img alt="" src="http://i.microsoft.com/global/hyper-v-server/en/us/PublishingImages/icon-table-full.gif" width="13" height="13" /></div></td></tr> <tr class="cueTableRowEven"> <td> <p class="cueParagraph">Guest Virtualization Rights Included in Host Server License</p></td> <td> <p class="cueParagraph">None—Each Windows Guest VM Requires a License</p></td> <td> <p class="cueParagraph">1 Physical + 1 VM*</p></td> <td> <p class="cueParagraph">1 Physical + 4 VMs*</p></td> <td> <p class="cueParagraph">1 Physical + Unlimited VMs (Free)</p></td></tr></tbody></table><br /></div></div><br /><br /><div class="cueSection"> <p class="cueParagraph">* Each additional Windows guest VM requires a license.</p><p class="cueParagraph"><br /></p> <p class="cueParagraph">If you need to acquire and host new server licenses, Windows Server 2008 Standard, Enterprise, and Datacenter provide the best value.</p></div><br />Sorry guys I can't be more wise to write more on Hyper-V so calling it a day now. Hope I will find myself again in a good mood to write some more enhanced article about MSFT Hyper-V.<br /><br />Hopefully after R2 release of Hyper-V.Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com8tag:blogger.com,1999:blog-7118971580202682778.post-37430976433554144262009-05-18T17:40:00.004+05:302009-05-18T17:47:59.502+05:30VMware vSphere 4.0 Software Compatibility MatrixGuys,<br /><br />A heads up for those who want to be on track with the changing of technology space from time to time.<br /><br />So this post if for all who fell frightened that who is who and what is what in the next release. Also this is a complete detail of on which what is going to be supported.<br /><br /><br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYJe0OF5f66CB3frGAILf7j4mUlZ7E0z6cbVzoFJK6UmUVElKvnrxx6wqNLgHF6DXolEQdQH2mGrrY9rewxF2OGOGrjU7i-U4RF8zlwr9EQ4AKcmRjbm3zIqwLMR9rNFa8ixdB9l2_dYnr/s1600-h/compar.jpg"><img style="cursor: pointer; width: 400px; height: 162px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiYJe0OF5f66CB3frGAILf7j4mUlZ7E0z6cbVzoFJK6UmUVElKvnrxx6wqNLgHF6DXolEQdQH2mGrrY9rewxF2OGOGrjU7i-U4RF8zlwr9EQ4AKcmRjbm3zIqwLMR9rNFa8ixdB9l2_dYnr/s400/compar.jpg" alt="" id="BLOGGER_PHOTO_ID_5337136455123116562" border="0" /></a><br /><br /><br />* Although these products will be compatible with vSphere in 2H09, you should start planning for the upgrade today.<br /><br /><br />To find out more, please visit the vSphere Upgrade Center at http://www.vmware.com/go/vsphere-upgrade-center.<br /><br /><br />** vCenter Server Heartbeat 5.5 becomes compatible with vCenter Server 4.0 with the release of Heartbeat 5.5 U1.<br /><br /><br />*** VMware Consolidated Backup 1.5 becomes compatible with vSphere 4.0 with the release of VCB 1.5 U1.<br /><br /><br />**** VMware View Manager and VMware View Composer are compatible with ESXi U3 and later.Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com0tag:blogger.com,1999:blog-7118971580202682778.post-79576136164433268532009-05-15T21:47:00.006+05:302009-05-15T22:06:18.296+05:30An Interesting Comparison in between the world leaders in Virtualization<div><div><div><div><span style="font-family:verdana;">Vmware is far ahead of race and far better. People like MS and Citrix will take decade to touch it.</span></div><div> </div><div> </div><div><span style="font-family:Verdana;"></span></div></div><div><div><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY0l2WzfEZjSklRd7s5bUeTFjjbJDaSc7mGwxHl628vQwOlaKCJhjx_LVRFaAfU1a2va_Z26zLSvYNCrhcK0E1B8i2uybxybYQczEljIMl3yuLb2iw1mFNEs-unrClqJ9lV1Fkn7gnxxof/s1600-h/1.jpg"><img id="BLOGGER_PHOTO_ID_5336087166755185474" style="WIDTH: 320px; CURSOR: hand; HEIGHT: 187px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgY0l2WzfEZjSklRd7s5bUeTFjjbJDaSc7mGwxHl628vQwOlaKCJhjx_LVRFaAfU1a2va_Z26zLSvYNCrhcK0E1B8i2uybxybYQczEljIMl3yuLb2iw1mFNEs-unrClqJ9lV1Fkn7gnxxof/s320/1.jpg" border="0" /></a><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiWdYgJiiGe78UnlHcSN3OfnN5rA5sSuYIuEcbkZivFKFNy3-VTLtCDgur1gBb9zz4SQLk3yROwkFJ77qKKiWjYOqeRN_xqh2yjuFg6UzO2kaU5Ne5F86rt3wdzhRp67r_Lxn8s9iuFDJFY/s1600-h/3.jpg"></a><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwuSs2wHoYpwXMIFGYw1uDKaWUHe7UodwJIFQEAe9gMntm99_id_BuoIsFUPjNEC9OG6BiW8tNaQgSp_l3-aSDxvxbR8mbzgoQ96kYZlg5pyysAzJjYErsFSQO9v1Qypwt-1hL3s_EW47o/s1600-h/2.jpg"><img id="BLOGGER_PHOTO_ID_5336089400669944258" style="WIDTH: 320px; CURSOR: hand; HEIGHT: 186px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwuSs2wHoYpwXMIFGYw1uDKaWUHe7UodwJIFQEAe9gMntm99_id_BuoIsFUPjNEC9OG6BiW8tNaQgSp_l3-aSDxvxbR8mbzgoQ96kYZlg5pyysAzJjYErsFSQO9v1Qypwt-1hL3s_EW47o/s320/2.jpg" border="0" /></a><br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPhi-1pE3vB2Hka7SIvCBzY3Amf_mTZ7VWUE7pE3AUQ9jOLcNJJB8Zx_l1UQ7LbBZIHVh99gT3vtfj7j7sdeiRyM50G57aUqYpA-D4zMgsZsESPyX6m4T_K9gtA54Vpvn_8gSaQvR5QE8S/s1600-h/3.jpg"><img id="BLOGGER_PHOTO_ID_5336089404701358210" style="WIDTH: 320px; CURSOR: hand; HEIGHT: 152px" alt="" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhPhi-1pE3vB2Hka7SIvCBzY3Amf_mTZ7VWUE7pE3AUQ9jOLcNJJB8Zx_l1UQ7LbBZIHVh99gT3vtfj7j7sdeiRyM50G57aUqYpA-D4zMgsZsESPyX6m4T_K9gtA54Vpvn_8gSaQvR5QE8S/s320/3.jpg" border="0" /></a><br /></div></div></div></div>Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com0tag:blogger.com,1999:blog-7118971580202682778.post-48296402509771592982009-05-15T20:31:00.005+05:302009-05-15T21:37:46.821+05:30How to Change Network File Copy Debugging LevelHi Friends,<br /><br />From my personal experiences at the support level I have seen that having the Debugging level to a great extent will always pay us back. So at any time changing the debugging level to the highest will give us a clear picture of what exactly is going on.<br /><br />So here we go. We know the NFC (Network File Copy) is a new baby in Vmware Virtual Infrastructure world. This has a great potential too at the same time. So this also has a debugging level set from the VPXA and VPXD stand point.<br /><br />So we need to increase the logging level to the max it is available to get to know what is under table.<br /><br /><u>Complete the following steps to setup network file copy (nfc) debugging:</u><br />Setup verbose logging at the host (/etc/opt/vmware/vpxa/vpxa.cfg):<br />Add the following to the vpxa.cfg file:<br /><nfc><br />"nfc"<br />"loglevel" debug <==change loglevel to "debug"; it's "error" by default "/loglevel"</loglevel><br /></nfc><br /><br /><u>Restart vpxa with the following:<br /></u># service vmware-vpxa restart<br /><br /><u>Setup verbose logging at the VC Server: </u><br /><br />To do this, edit the vpxd.cfg file located at %ALLUSERSPROFILE%\Application Data\VMware\VMware VirtualCenter\vpxd.cfg<br /><br />WARNING: Make a backup copy of the file before editing.<br /><br />Edit the file with Notepad or any text editor.<br />Add the following to vpxd.cfg between the "config" <config>stanza. "nfc" and "log" <nfc><log>elements are going to be added as children of the "config" <config>element.<br /><br /><config>"config"<br />...<br />"nfc"<br />"loglevel"debug"/loglevel"<br />"/nfc"<br /><br />"log"<br />"level"trivia"/level"<br />"maxfilenum"30"/maxfilenum"<br />"/log"<br />...<br />"/config"<br /></config><br /><br />This will setup nfc debug, change the loglevel to trivia and retain 30 Files instead of the default 10. The trace will log SQL statements and connections to help diagnose the issue. The log level must be set to verbose or trivia for this to work.<br /><br />This cannot all be done in the VI client GUI , so it will have to be done as shown previously.<br />NOTE: These should be removed when finished (copy the saved file back over them) , to avoid confusion with the GUI setup.<br /><br />After making the changes restart the VC service (VC server reads vpxd.cfg on startup, so it needs to be restarted).Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com0tag:blogger.com,1999:blog-7118971580202682778.post-50025142142459469832009-05-15T19:59:00.002+05:302009-05-15T20:12:57.874+05:30How to Recreate VMDK File when CorruptOn ESX 3, VirtualMachine(VM) has one or more VMDK files (extension .vmdk) and one or more flat vmdk files (last characters flat.vmdk ).In some cases, you may corrupt, lose, or accidentally delete your VMDK files. The VMDK’s contain metadata for the flat.vmdk files. Without VMDK’s, you cannot load the flat.vmdk-files.<br /><br /><br />Consequence: You cannot load the VM in VirtualCenter and cannot start the VM.<br /><br /><u>There are two ways to recreate the vmdk files (.vmdk): </u><br /><br />I. Creating a new virtual disk.<br /><br />* Create a new virtual disk of the same size as old ones for the "VM A" as vmA1-flat.vmdk which in turn will create a new vmdk descriptor file and refer that file for the old one.<br /><br /><u>Command:</u><br /><br />#vmkfstools -c 8192m /vmfs/volumes/100GB-Tru64-EVA/vmA/vmA1.vmdk<br />where, 8192MB is the virtual disk size and vmA1.vmdk is the descriptor file for the newly created disk "vmA1-flat.vmdk".<br /><br />Edit the VMDK’s with a text editor(vi/nano):<br /><br />This will now refer to the vmA1, but it should refer to you're the old one, vmA. You need to replace the vmA1 descriptor file with the correct file names; that is, vmA. <br /><br /><u>For example: </u><br /># mv vmA1.vmdk vmA.<br /># vi vmA.vmdk <br /><br /><u>The file will look like: </u><br /># Disk DescriptorFile <br />version=1 <br />CID=6479ab28 <br />parentCID=ffffffff <br />createType="vmfs" <br /><br /># Extent description <br /><br />RW 4194304 VMFS "vmA1-flat.vmdk" <br /><br /># The Disk Data Base <br />#DDB <br /><br />ddb.virtualHWVersion = "4" <br />ddb.uuid = "60 00 C2 9a dc 6c 31 eb-81 6f f1 a1 ca 2d 7b 37"<br />ddb.geometry.cylinders = "261"<br />ddb.geometry.heads = "255" <br />ddb.geometry.sectors = "63" <br />ddb.adapterType = "lsilogic" <br /><br />Edit the line: RW 4194304 VMFS "vmA1-flat.vmdk" TO RW 4194304 VMFS "vmA-flat.vmdk" <br /><br />* Save the file. <br />* Load the VM from the VirtualCenter; that is, Power ON VM A.<br /><br />2. Creating a new virtual machine.<br />A. Determine the hard disk sizes of your original VM. (Lets call this VM as “VM A”).<br />B. Create a new VM (called “VM B”) from VirtualCenter with the same number of hard disks as the old VM, and the exact same sizes.<br /><br /><u>Steps:</u><br /><u></u><br />a) Login to VirtualCenter. Select the ESX host.<br />b) Select "CREATE A NEW VIRTUAL MACHINE". A "New VM wizard" will appear.Select "VM Configuration" as "Typical". Click NEXT.<br />c) Give a name to the VM; for eg: vmB. Click NEXT.<br />d) Select the datastore and click NEXT.<br />e) Select the Guest OS as the VM A "vmA" was installed with. Click NEXT.<br />f) Select the no. of virtual processors. Click NEXT.<br />g) Select the memory as required, click NEXT.<br />h) Create Network Connections as required, click NEXT.I) Select the Virtual disk size same as "VM A". Click NEXT.<br />j) Click FINISH.<br /><br /><br />3. After the VM B has been created, use Putty (or a similar tool) to navigate to the ESX server. Then navigate to the location/directory where your VM B is stored. For example:#cd /vmfs/volumes/100GB-Tru64-EVA/vmB<br /><br /><br />4. Copy all VMDK’s (not the flat ones, but only the metadata files) to VM A directory. The filesize of your META-data files should be a few KB. For example: # cp vmB.vmdk /vmfs/volumes/100GB-Tru64-EVA/vmA/<br /><br /><br />5. Navigate to VM A directory where the *.VMDK file/s are copied. Edit the VMDK’s with a text editor(vi/nano): They will now refer to the VM B, but they should refer to your old VM A. You should replace the VM B filenames with the correct file names; that is, VM A. <br /><br /><u>For example:</u><br /># mv vmB.vmdk vmA.vmdk <br /># vi vmA.vmdk <br /><br /><u>The file will look like: </u><br /><br /># Disk DescriptorFile <br />version=1 <br />CID=6479ab28 <br />parentCID=ffffffff <br />createType="vmfs" <br /># Extent description <br />RW 4194304 VMFS "vmB-flat.vmdk" <br /><br /># The Disk Data Base <br />#DDB <br /><br />ddb.virtualHWVersion = "4" <br />ddb.uuid = "60 00 C2 9a dc 6c 31 eb-81 6f f1 a1 ca 2d 7b 37"<br />ddb.geometry.cylinders = "261"<br />ddb.geometry.heads = "255" <br />ddb.geometry.sectors = "63" <br />ddb.adapterType = "lsilogic" <br /><br /><u>Edit the line: </u><br />RW 4194304 VMFS "vmB-flat.vmdk" TO RW 4194304 VMFS "vmA-flat.vmdk" <br /><br />5. Save the file. 6. Load the VM from the VirtualCenter; that is, Power ON VM A.You should now be able to Power ON the VM A and recover the data.Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com1tag:blogger.com,1999:blog-7118971580202682778.post-17574554539127527132009-05-15T02:05:00.002+05:302009-05-15T02:15:40.244+05:30All of the Advanced Options for HA<span style="font-family: verdana;">We manage to get all the HA advanced options. With ESX 3.5 Update 2 VMware added a couple of extra advanced options, this is the complete list:</span><br /><br /><br /><span style="font-family: verdana;">• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.failuredetectiontime</span> - Amount of milliseconds, timeout time for isolation response action(with a default of 15000 milliseconds).<br /><br /></span><span style="font-family: verdana;"><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.isolationaddress[x]</span> - IP address the ESX hosts uses for its heartbeat, where [x] = 1‐10. It will use the default gateway by default.</span><br /><br /><span style="font-family: verdana;"><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.usedefaultisolationaddress</span> - Value can be true or false and needs to be set in case the default gateway, which is the default isolation address shouldn’t be used for this purpose.</span><br /><br /><span style="font-family: verdana;"><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.poweroffonisolation</span> - Values are False or True, this is for setting the isolation response. Default a VM will be powered off.</span><br /><br /><span style="font-family: verdana;"><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.vmMemoryMinMB</span> - Higher values will reserve more space for failovers.</span><br /><span style="font-family: verdana;"><br /><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.vmCpuMinMHz</span> - Higher values will reserve more space for failovers. </span><br /><span style="font-family: verdana;"><br /><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.defaultfailoverhost</span> - Value is a hostname, this host will be the primary failover host. </span><br /><span style="font-family: verdana;"><br /><span style="font-style: italic; font-weight: bold;"><br />The new ones:</span></span><br /><span style="font-family: verdana;"><br /><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.failuredetectioninterval</span> - Changes the heartbeat interval among HA hosts. By default, this occurs every second (1000 milliseconds). </span><br /><span style="font-family: verdana;"><br /><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.allowVmotionNetworks</span> - Allows a NIC that is used for VMotion networks to be</span> <span style="font-family: verdana;">considered for VMware HA usage. This permits a host to have only one NIC configured for management and VMotion combined. </span><br /><span style="font-family: verdana;"><br /><br />• <span style="font-weight: bold; color: rgb(204, 0, 0);">das.allowNetwork[x]</span> - Enables the use of port group names to control the networks used for VMware HA, where [x] = 0 - ?. You can set the value to be Service Console 2 or Management Network to use (only) the networks associated with those port group names in the networking configuration. </span><br /><span style="font-family: verdana;"><br /><br />• <span style="color: rgb(204, 0, 0); font-weight: bold;">das.isolationShutdownTimeout</span> - Shutdown time out for the isolation response “Shutdown VM”, default is 300 seconds. In other words, if a VM isn’t shutdown clean when isolation response occurred it’s being powered off after 300 seconds.</span>Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com0tag:blogger.com,1999:blog-7118971580202682778.post-48973277260054915532009-04-28T23:46:00.008+05:302009-04-29T00:21:49.877+05:30VMFS Deep Dive<meta equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 12"><meta name="Originator" content="Microsoft Word 12"><link style="font-family: verdana;" rel="File-List" href="file:///C:%5CUsers%5Csarprase%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"><link style="font-family: verdana;" rel="Edit-Time-Data" href="file:///C:%5CUsers%5Csarprase%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_editdata.mso"><!--[if !mso]> <style> v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} 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mso-hansi-theme-font:minor-latin;} </style> <![endif]--> <p style="font-family: verdana;" class="Default"><span style="font-size:85%;"><b><u><span style="">Agenda</span></u></b></span></p> <p style="font-family: verdana;" class="Default"><span style="font-size:85%;"><u><span style=""><o:p><span style="text-decoration: none;">
<br /></span></o:p></span></u></span></p> <p style="font-family: verdana;" class="Default"><span style=";font-size:85%;" >VMFS Deep Dive<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >ESX Storage Stack and VMFS<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >VMFS Vs RDM<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >SCSI reservation conflicts<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Multipathing<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Snapshot LUNs and resignaturing</span></p><p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;">
<br /><span style=";font-size:85%;" ><o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-weight: bold; font-family: arial;" class="Default"><span style="font-size:100%;"><u>The Storage Stack in VI3</u></span></p><p style="font-family: arial;" class="Default">
<br /><span style="font-size:85%;"><b><u><o:p></o:p></u></b></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><b><o:p> </o:p></b></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9XoLpUhQ4rhBMVybPDKkCdOujp0N9WknEIFM6ASEgksQJOBHRt0likQQnSWTcm266uNI-QD5AxaqxhOzJYEcHW2xn4OOorxV9IR5QTPGeiuyOZy0QA-3LOL56CoahhalBOBXwWCgeN8TW/s1600-h/stack.jpg"><img style="cursor: pointer; width: 320px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9XoLpUhQ4rhBMVybPDKkCdOujp0N9WknEIFM6ASEgksQJOBHRt0likQQnSWTcm266uNI-QD5AxaqxhOzJYEcHW2xn4OOorxV9IR5QTPGeiuyOZy0QA-3LOL56CoahhalBOBXwWCgeN8TW/s320/stack.jpg" alt="" id="BLOGGER_PHOTO_ID_5329808648968837394" border="0" /></a></span>
<br /><span style=";font-size:85%;" ><o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: verdana;" class="MsoNormal"><span style="font-size:85%;"><b style=""><span style="line-height: 115%;">VMFS – A Clustered filesystem for today’s dynamic IT world<o:p></o:p></span></b></span></p> <p style="font-family: verdana;" class="Default"><span style="font-size:85%;"><o:p> </o:p></span></p> <p class="Default" style="margin-left: 112.5pt; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Built-In VMFS Cluster File System<o:p></o:p></span></p> <p class="Default" style="margin-left: 112.5pt; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Simplifie</span><span style=";font-size:85%;" >s VM provisioning<o:p></o:p></span></p> <p class="Default" style="margin-left: 112.5pt; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Enables independent VMotion and HA restart of VMs in common LUN<o:p></o:p></span></p> <p class="Default" style="margin-left: 112.5pt; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >File-level locking protects virtual disks<o:p></o:p></span></p> <p class="Default" style="margin-left: 112.5pt; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Separates VM and storage administration</span></p> <p class="Default" style="margin-left: 112.5pt; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Use RDMs for access to SAN features<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style=";font-size:85%;" > </span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;"><span style="font-size:100%;">Raw Disk Mapping (RDM)</span><o:p></o:p></span></u></b></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Mapping files in a VMFS volume<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Presented as virtual SCSI device<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Key contents of the metadata include location and locking of mapped device<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Virtual machine must interact with a real disk on the SAN<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style="font-size:85%;"><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;">Microsoft Cluster Services (MSCS)</span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;"><span style="font-size:100%;">Storage – VMFS vs. RDM</span><o:p></o:p></span></u></b></span></p> <p style="font-family: verdana;" class="Default"><span style="font-size:85%;"><b><u><span style="">RAW</span></u></b><b><span style=""><span style=""> </span><span style=""> </span><span style=""> </span><u>VMFS</u></span></b></span><span style=";font-size:85%;" ><o:p></o:p></span></p> <p style="font-family: verdana;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: verdana;" class="Default"><span style=";font-size:85%;" >RAW may give better performance<span style=""> </span>Leverage templates and quick provisioning<o:p></o:p></span></p> <p style="font-family: verdana;" class="Default"><span style=";font-size:85%;" >RAW means more LUNs - More provisioning time<span style=""> </span>Fewer LUNs </span><span style=";font-size:85%;" >means you don’t have to watch Heap<o:p></o:p></span></p> <p style="font-family: verdana;" class="Default"><span style=";font-size:85%;" >Advanced features still work</span><span style="font-size:85%;"><span style=""> </span></span><span style=";font-size:85%;" >Scales better with Consolidated Backup<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><span style="font-family: verdana;"> </span><span style="font-family:verdana;">Preferred Method</span><o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><span style="font-size:100%;"><u style="font-weight: bold;">Skeleton of a VMFS</u></span></span></p><p style="font-family: arial;" class="Default">
<br /><span style="font-size:85%;"><b><u><o:p></o:p></u></b></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >A VMFS holds files and has its own metadata<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Metadata gets updated through<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Creating a file<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Changing a file’s attributes<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Powering on a VM<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Powering off a VM<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Growing a file<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >
<br /></span></p><ul><li><span style=";font-size:85%;" >When metadata is updated, the VMkernel places a non-persistent SCSI reservation on the entire VMFS volume</span></li><li><span style=";font-size:85%;" >Lock held on volume for the duration of the operation<o:p></o:p></span></li><li><span style=";font-size:85%;" >Other VMkernels are prevented from doing metadata updates<o:p></o:p></span></li></ul> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><span style="line-height: 115%;"><o:p><span style="text-decoration: none;"> </span></o:p></span></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;"><span style="font-size:100%;">VMFS 3 & SCSI Reservations</span><o:p></o:p></span></u></b></span></p> <ul><li><span style=";font-size:85%;" >Concurrent-access filesystem<o:p></o:p></span></li><li><span style=";font-size:85%;" >Most I/O happens simultaneously from all hosts<o:p></o:p></span></li><li><span style=";font-size:85%;" >Filesystem metadata updates are atomic and performed by the requesting host<o:p></o:p></span></li></ul> <!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">
<br /> -<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Locking a file for read/write (e.g. vmdk when powering on VM)<o:p></o:p></span>
<br /><!--[if !supportLists]--><span style=";font-size:85%;" ><span style=""> -<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Creating a new directory or file <o:p></o:p></span>
<br /><!--[if !supportLists]--><span style=";font-size:85%;" ><span style=""> -<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Growing a file etc.<o:p></o:p></span> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;">For the time needed by the locking operation (NOT metadata update), a LUN is reserved (=locked for access) to a single host</span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><span style="font-size:100%;"><b><u>SCSI Reservation Conflict – What it is</u></b></span></span></p><p style="font-family: arial;" class="Default">
<br /><span style="font-size:85%;"><u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >What happens if we try to perform I/O to a LUN that’s already reserved? <o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; font-family: arial;"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >A retry counter is decreased and the I/O operation is retried<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >The retry is scheduled with a pseudo-random algorithm<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >If the counter reaches 0, we have a SCSI reservation conflict<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >SCSI: 6630: Partition table read from device vmhba1:0:6 failed: SCSI reservation conflict (0xbad0022)<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >SCSI: vm 1033: 5531: Sync CR at 64<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >SCSI: vm 1033: 5531: Sync CR at 48<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >SCSI: vm 1033: 5531: Sync CR at 32<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >SCSI: vm 1033: 5531: Sync CR at 16<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >SCSI: vm 1033: 5531: Sync CR at 0<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >WARNING: SCSI: 5541: Failing I/O due to too many reservation conflicts<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;">WARNING: SCSI: 5637: status SCSI reservation conflict, r</span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;">status 0xc0de01 for vmhba1:0:6. residual R 919, CR 0, ER 3</span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;"><span style="font-size:100%;">Who’s holding a SCSI Reservation?</span></span></u></b></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >One ESX host (persistent reservation)<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;"><i><span style="">vmkfstools –L reserve </span></i></span><span style=";font-size:85%;" >: This should NEVER EVER be done<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Interaction with installed third-party management agents<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Multiple ESX hosts, alternatively<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >High latency/slow SAN<o:p></o:p></span></p> <p class="Default" style="margin-left: 1in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">o<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Critical lock-passing between ESX hosts during vmotion<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >SAN firmware slow in honoring SCSI reserve/release</span></p> <p class="Default" style="margin-left: 1in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">o<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Synchronously mirrored LUNs<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><u><span style=";color:#000000;" ><o:p><span style="text-decoration: none;"> </span></o:p></span></u></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >One non-ESX host<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >LUN erroneously mapped to e.g. a Windows host<o:p></o:p></span></p> <p class="Default" style="margin-left: 93.25pt; text-indent: 0in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style=""><span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >No host<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Persistent reservation held by the SAN<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;">Needs investigation by the SAN vendor<u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">ESX Server Multipathing</span></u></b></span></p> <p style="font-family: arial; 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<br /></span></p><p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Determined at boot, install / rescan:<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >N = adapter number<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >T = target number (generally 1 SP = 1 target)<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Determined by the SAN<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >L = LUN ID<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >SCSI identifier of the LUN (not shown here)<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Determined at datastore or extent creation<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >P = partition number (if 0 or absent = whole disk)<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">Per-LUN Multipathing Failover Policy<o:p></o:p></span></u></b></span></p><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmZ7WkuopMkfkTzZmxpTm2HA9WogZnoDmkzvWIEtCO-0dugAowkYYJRJG58g9qSjNkoPCg2yQqysdLnVJZ5e9ocg2EhqT2SAUELyNQmopJC-ntnfCV6yu6uk2nwM3J-j4bLagkg2uLIqhl/s1600-h/failover.jpg"><img style="cursor: pointer; width: 320px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhmZ7WkuopMkfkTzZmxpTm2HA9WogZnoDmkzvWIEtCO-0dugAowkYYJRJG58g9qSjNkoPCg2yQqysdLnVJZ5e9ocg2EhqT2SAUELyNQmopJC-ntnfCV6yu6uk2nwM3J-j4bLagkg2uLIqhl/s320/failover.jpg" alt="" id="BLOGGER_PHOTO_ID_5329814147040632210" border="0" /></a><p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >VMware supports using only one path at a time<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >MRU = Most Recently Used<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Fixed = choose a preferred path & failback to it<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >multiple ESX hosts or multiple LUNs, allows for manual load balancing between SPs <o:p></o:p></span></p> <p class="Default" style="margin-left: 1.55in; text-indent: 0in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style=""><span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;">Never setup Fixed policy with an active/passive SAN! Why?</span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">Path Thrashing<o:p></o:p></span></u></b></span></p> <p style="font-family: arial;" class="MsoNormal"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1VnQwhOePDw4Bfu8RsHXlzFztpJeE_WtRtyIQlpETTI7vm0M80DnmcXmmU_0G3hqSWIqP2-SJDD60MLP0UcgjZ7Am0nd_DBC3IRAybKD-y3PjSgFhrr6Lv1au8mxsubZEGnrEvjYqZayO/s1600-h/thrashing.jpg"><img style="cursor: pointer; width: 320px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi1VnQwhOePDw4Bfu8RsHXlzFztpJeE_WtRtyIQlpETTI7vm0M80DnmcXmmU_0G3hqSWIqP2-SJDD60MLP0UcgjZ7Am0nd_DBC3IRAybKD-y3PjSgFhrr6Lv1au8mxsubZEGnrEvjYqZayO/s320/thrashing.jpg" alt="" id="BLOGGER_PHOTO_ID_5329814650228450738" border="0" /></a></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Only possible on active/passive SANs<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Host 1 needs access to the LUN through SP1<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Host 2 needs access to the LUN through SP2<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style="font-size:85%;"><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;">The LUN keeps being trespassed between SPs and it’s never available for I/O<u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><b><u><span style="">Multipathing</span></u></b><u><span style=""><o:p></o:p></span></u></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Active/Active<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >LUNs presented on multiple Storage Processors<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Fixed path policy<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: 0.5in; font-family: arial;"><span style=";font-size:85%;" >Failover on NO_CONNECT<o:p></o:p></span></p> <p class="Default" style="margin-left: 1in; font-family: arial;"><span style=";font-size:85%;" >Preferred path policy<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: 0.5in; font-family: arial;"><span style=";font-size:85%;" >Failback to preferred path if it recovers<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Active/Passive<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >LUNs presented on a single Storage Processor<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >MRU (Most Recently Used) path policy<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: 0.5in; font-family: arial;"><span style=";font-size:85%;" >Failover on NOT_READY, ILLEGAL_REQUEST or NO_CONNECT<o:p></o:p></span></p> <p class="MsoNormal" style="margin-left: 0.5in; text-indent: 0.5in; font-family: arial;"><span style="font-size:85%;">No preferred path policy, no failback to preferred path</span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Load Balancing<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Fixed (Preferred Path)<o:p></o:p></span></p> <p class="Default" style="margin-left: 97.75pt; font-family: arial;"><span style=";font-size:85%;" >1st active path discovered or user configured.<o:p></o:p></span></p> <p class="Default" style="margin-left: 97.75pt; font-family: arial;"><span style=";font-size:85%;" >Active/Active arrays only<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Most recently used (MRU)<o:p></o:p></span></p> <p class="Default" style="margin-left: 97.75pt; font-family: arial;"><span style=";font-size:85%;" >Active/Active arrays<o:p></o:p></span></p> <p class="Default" style="margin-left: 97.75pt; font-family: arial;"><span style=";font-size:85%;" >Active/Passive arrays<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">Snapshot LUNs and Resignaturing</span></u></b><u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><b><span style="">How VMware ESX Identifies Disks</span></b></span><span style=";font-size:85%;" ><o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >Each LUN has a SCSI identifier string provided by the SAN vendor<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >The SCSI ID stays the same amongst different paths<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >The vmkernel identifies disks with a combination of LUN ID, SCSI ID and part of the model string<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ># ls -l /vmfs/devices/disks/<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >total 179129968<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >-rwxrwxrwx 1 root root 72833679360 Nov 13 12:16 vmhba0:0:0:0<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >lrwxrwxrwx 1 root root 58 Nov 13 12:16 vmhba1:0:0:0 -> vml.020000000060060160432017002a547c3e7893dc11524149442035<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >lrwxrwxrwx 1 root root 58 Nov 13 12:16 vmhba1:0:1:0 -> vml.02000100006006016043201700a99d1c3bb9c5dc11524149442035<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >lrwxrwxrwx 1 root root 58 Nov 13 12:16 vmhba1:0:10:0 -> vml.02000a000060060160432017000db2f61d17d3dc11524149442035<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;">(...)</span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;"><o:p><span style="text-decoration: none;"> </span></o:p></span></u></b></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">Snapshot LUNs & Resignaturing – Key Facts<o:p></o:p></span></u></b></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >ESX identifies objects in a VMFS datastore by path e.g. /vmfs/volumes/<vmfs uuid="">/<path><o:p></o:p></path></vmfs></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >The VMFS UUID (aka signature) is generated at VMFS creation<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style="font-size:85%;"><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;">The VMFS header includes hashed information about the disk where it’s been created<u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwQfFAbJ86fOmWQql091IFdnUPy-UoU3jSi2uP3M2SLtim_uXchBBGlAqwut58toaPgQGO-05rwl1LemaAnokzfg1OnV-vmWaUP7_ffVn17pY1vCxu2DbfI9iPjB_ojgUgOxqTgI986hrf/s1600-h/facts.jpg"><img style="cursor: pointer; width: 320px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwQfFAbJ86fOmWQql091IFdnUPy-UoU3jSi2uP3M2SLtim_uXchBBGlAqwut58toaPgQGO-05rwl1LemaAnokzfg1OnV-vmWaUP7_ffVn17pY1vCxu2DbfI9iPjB_ojgUgOxqTgI986hrf/s320/facts.jpg" alt="" id="BLOGGER_PHOTO_ID_5329814137827155010" border="0" /></a></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><b><span style="">The Check for Snapshot LUNs</span></b></span><span style=";font-size:85%;" ><o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >VMFS relies on SCSI reservations to acquire on-disk locks, which in turn enforce atomicity of filesystem metadata updates"<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >SCSI reservations don’t work across mirrored LUNs<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;">To avoid corruption, we need to prevent mounting a datastore and a copy of it at the same time<u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgggHfkGoHwPdokSU2omgX6AOLUj9uKepjB-jvsCRrSqgOkuEaUV-uOpa_dOX8kU0dzGYm71kFQPRDtVDuxX3BHrE5S_lfOyUFgR-eXqG35dLe22-Y8GDEhHyq6zgCGhTOdJgJ-IrTiej68/s1600-h/check.jpg"><img style="cursor: pointer; width: 320px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgggHfkGoHwPdokSU2omgX6AOLUj9uKepjB-jvsCRrSqgOkuEaUV-uOpa_dOX8kU0dzGYm71kFQPRDtVDuxX3BHrE5S_lfOyUFgR-eXqG35dLe22-Y8GDEhHyq6zgCGhTOdJgJ-IrTiej68/s320/check.jpg" alt="" id="BLOGGER_PHOTO_ID_5329814144158019250" border="0" /></a></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >On rescan, the information about the disk in the VMFS header metadata (m/d) is checked against the actual values<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >If any of the fields doesn’t match, the VMFS is not mounted and ESX complains it’s a snapshot LUN<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >LVM: 5739: Device vmhba1:0:1:1 is a snapshot:<o:p></o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >LVM: 5745: disk ID: <type len="" lun="" devtype="" scsi="" 7938754210381436390=""><o:p></o:p></type></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >LVM: 5747: m/d disk ID: <type len="" lun="" devtype="" scsi="" 1885223299069406671=""><o:p></o:p></type></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;">ALERT: LVM: 4903: vmhba1:0:1:1 may be snapshot: disabling access. See resignaturing section in SAN config guide.</span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">LUNs Detected as Snapshots – Causes</span></u></b><u><o:p></o:p></u></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >LUN ID mismatch<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >SCSI ID change (e.g. LUN copied to a new SAN)<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style="font-size:85%;"><span style="">Ø<span style=""> </span></span></span><!--[endif]--><span style="font-size:85%;">They are effectively snapshots (e.g. DR site)<u><o:p></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVz-lo0elHxLeU43_7R3Z__BNxLN8uo7oExFtmnE90_q2zJA8AHkkSpR8dH_JO52lg-sqzdsPrx5YM4z1cQfF0v2qWAdwZANeMloXiT2WkBiyabohw1OlhEV7yUemBD6ItZDBYdS9dkIaf/s1600-h/causes.jpg"><img style="cursor: pointer; width: 320px; height: 272px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVz-lo0elHxLeU43_7R3Z__BNxLN8uo7oExFtmnE90_q2zJA8AHkkSpR8dH_JO52lg-sqzdsPrx5YM4z1cQfF0v2qWAdwZANeMloXiT2WkBiyabohw1OlhEV7yUemBD6ItZDBYdS9dkIaf/s320/causes.jpg" alt="" id="BLOGGER_PHOTO_ID_5329814137194053058" border="0" /></a></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><span style=""><!--[if gte vml 1]><v:shape id="Picture_x0020_11" spid="_x0000_i1026" type="#_x0000_t75" style="'width:440.25pt;"> <v:imagedata src="file:///C:\Users\sarprase\AppData\Local\Temp\msohtmlclip1\01\clip_image017.emz" title=""> </v:shape><![endif]--><!--[if !vml]-->
<br /><!--[endif]--></span><o:p></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">LUNs Detected as Snapshots – How to Fix<o:p></o:p></span></u></b></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" >Are they mirrored/snapshot LUNs?<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >If yes: will the ESX host(s) ever see both original and copy at the same time?<o:p></o:p></span></p> <p class="Default" style="margin-left: 1.55in; font-family: arial;"><span style=";font-size:85%;" >Yes – resignature<o:p></o:p></span></p> <p class="Default" style="margin-left: 1.55in; font-family: arial;"><span style=";font-size:85%;" >No – either allow snapshots or resignature<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >If no: do multiple ESX hosts see the same LUN with different IDs?<o:p></o:p></span></p> <p class="Default" style="margin-left: 1.55in; font-family: arial;"><span style=";font-size:85%;" >Yes – fix the SAN config; if not possible allow snapshots<o:p></o:p></span></p> <p class="Default" style="margin-left: 1.55in; font-family: arial;"><span style=";font-size:85%;" >No – IDs permanently changed: either allows snapshots or resignature<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><b><u><span style="line-height: 115%;">Resignaturing Issues<o:p></o:p></span></u></b></span></p> <p style="font-family: arial;" class="Default"><span style=";font-size:85%;" ><o:p> </o:p></span></p> <p style="font-family: arial;" class="Default"><span style="font-size:85%;"><b><span style="">Never ever </span></b></span><span style=";font-size:85%;" >resignature while the VMs are running<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >resignaturing implies changing UUID and datastore name<o:p></o:p></span></p> <p class="Default" style="margin-left: 0.5in; text-indent: -0.25in; font-family: arial;"><!--[if !supportLists]--><span style=";font-size:85%;" ><span style="">-<span style=""> </span></span></span><!--[endif]--><span style=";font-size:85%;" >All paths to filesystem objects (vmdks, VMs) will become invalid!<o:p></o:p></span></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> <p style="font-family: arial;" class="MsoNormal"><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4d5AYBdqJNu5rwde7j9_a2NlTez0-rgia-K2Zk6PmJt7uH-QdRXLi6QlVP8Dl0abtHfzoAeUG96J7PNIL3XHd9TtjBPZLyIcEdrf8kaChcDr2X1OzFhfqj8w2SBCUc8fkatjUTtxyY22D/s1600-h/signature.jpg"><img style="cursor: pointer; width: 320px; height: 256px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh4d5AYBdqJNu5rwde7j9_a2NlTez0-rgia-K2Zk6PmJt7uH-QdRXLi6QlVP8Dl0abtHfzoAeUG96J7PNIL3XHd9TtjBPZLyIcEdrf8kaChcDr2X1OzFhfqj8w2SBCUc8fkatjUTtxyY22D/s320/signature.jpg" alt="" id="BLOGGER_PHOTO_ID_5329814646236497554" border="0" /></a></p> <p style="font-family: arial;" class="MsoNormal"><span style="font-size:85%;"><u><o:p><span style="text-decoration: none;"> </span></o:p></u></span></p> Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com0tag:blogger.com,1999:blog-7118971580202682778.post-58835731498663202702009-04-17T17:47:00.003+05:302009-04-17T18:02:54.978+05:30How to Change the Polling Interval of the cmafcad Fiber Channel Agent<meta equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 12"><meta name="Originator" content="Microsoft Word 12"><link rel="File-List" href="file:///C:%5CUsers%5Csarprase%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"><link rel="themeData" href="file:///C:%5CUsers%5Csarprase%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_themedata.thmx"><link rel="colorSchemeMapping" 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5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman","serif";} </style> <![endif]--><span style="font-size:85%;">Information
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<br />The HP Management Agents for VMware ESX Server 3.x include a Fiber Channel Agent (FCA agent) called <span style="font-weight: bold; color: rgb(0, 0, 153);">cmafcad</span>. If SCSI reservation conflicts on the ESX host are resulting in failed I/O or performance issues, it can be necessary to increase the <span style="font-weight: bold; color: rgb(0, 0, 153);">polling interval</span> of the Fiber Channel Agent. This can reduce the amount of SCSI reservation conflicts typical during peak business hours, VM startup, and VMotions.
<br /></span><span style="font-weight: bold;">
<br /></span><span style="font-size:85%;">Details
<br />******
<br />The following can be seen in the <span style="font-weight: bold; color: rgb(0, 0, 153);">/var/log/vmkernel</span> file:
<br />
<br /><span style="font-style: italic;font-size:78%;" >WARNING: SCSI: 5446: Failing I/O due to too many reservation conflicts
<br />WARNING: SCSI: 5541: status 0xbad0022, rstatus 0xc0de01 for vmhba1:0:0. residual R 919, CR 0, ER 3
<br />WARNING: Fil3: 1538: Failed to reserve volume
<br />
<br /></span></span><span style="font-weight: bold;">
<br /><span style="color: rgb(0, 0, 153);"><span style="font-size:85%;">NOTE: 0xbad0022 translates to VMK_RESERVATION_CONFLICT per vmkerrcode.</span>
<br />
<br /></span></span><span style="color: rgb(0, 0, 153);"><span style="font-size:85%;"><span style="color: rgb(0, 0, 0);">Although reservation conflicts are not always an indication of an issue, large amounts of reservation conflicts resulting in failing I/O are, and should be addressed. There are many things that can contribute to reservation conflicts in a Virtual Infrastructure environment. Be advised that the following is only one possible solution to this issue. Other possible causes should be investigated.
<br />
<br />
<br /></span><span style="color: rgb(0, 0, 0);">Increasing the <span style="font-weight: bold; color: rgb(0, 0, 153);">polling interval</span> of the FCA agent can reduce SCSI reservation conflicts on the host by decreasing the amount of reservations required on a given LUN.
<br />
<br />
<br /></span><span style="color: rgb(0, 0, 0);">The following steps show the procedure for increasing the <span style="font-weight: bold; color: rgb(0, 0, 153);">polling interval</span>:
<br />
<br />
<br /></span><span style="color: rgb(0, 0, 0);">1. Login to the ESX server from an SSH client or from iLO.
<br /></span><span style="color: rgb(0, 0, 0);">2. Using an editor such as nano or vi, open the file <span style="font-weight: bold; color: rgb(0, 0, 153);">/opt/compaq/storage/etc/cmafcad</span>.</span>
<br /><span style="color: rgb(0, 0, 0);">3. Change the <span style="font-weight: bold; color: rgb(0, 0, 153);">polling interval</span> from 15 seconds to a larger span, such as 60 seconds.
<br />
<br />
<br /></span><span style="color: rgb(0, 0, 0);">Look for the variable <span style="font-weight: bold; color: rgb(0, 0, 153);">PFLAGS</span>. By default, it looks like this: <span style="font-weight: bold;"><span style="color: rgb(0, 0, 153);">PFLAGS="-p 15 -s OK"</span> </span></span>
<br /><span style="color: rgb(0, 0, 0);">Change it to the desired value: <span style="font-weight: bold; color: rgb(0, 0, 153);">PFLAGS="-p 60 -s OK" </span>
<br />
<br />
<br /></span><span style="color: rgb(0, 0, 0);">4. Save the file, and exit from the editor.
<br /></span><span style="color: rgb(0, 0, 0);">5. Restart the management agents on the host. The following shows how this is done with the 8.0.0 Management Agents. See the appropriate documentation or man pages for later agents.
<br /></span><span style="color: rgb(0, 0, 0);">
<br /># service hpasm stop
<br /></span><span style="color: rgb(0, 0, 0);"># service hpsmhd restart </span>
<br /><span style="color: rgb(0, 0, 0);"># service hpasm start
<br />
<br /></span><span style="color: rgb(0, 0, 0);">The new settings should be the following in a <span style="font-weight: bold; color: rgb(0, 0, 153);">ps</span> listing:</span>
<br />
<br /><span style="color: rgb(0, 0, 0);"># ps -auxwww | grep cmafcad </span>
<br /><span style="color: rgb(0, 0, 0);">root 14557 0.0 0.9 14676 2452 pts/1 S 18:31 0:00 cmafcad -p 60 -s OK </span>
<br /></span></span><span style="font-weight: bold;"><span style="color: rgb(0, 0, 153);">
<br /></span></span><p class="MsoNormal" style="margin: 1.5pt 6pt 6pt 37.5pt; background: rgb(238, 238, 238) none repeat scroll 0% 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; vertical-align: top;"><span style="font-size: 12pt; font-family: "Arial","sans-serif"; color: black;"><o:p></o:p></span></p> Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com1tag:blogger.com,1999:blog-7118971580202682778.post-14515822672396323612009-04-14T01:37:00.005+05:302009-04-14T01:59:13.917+05:30How to disable the cmafcad (HP SIM Fibre Channel agent) <meta equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 12"><meta name="Originator" content="Microsoft Word 12"><link rel="File-List" href="file:///C:%5CUsers%5Csarprase%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_filelist.xml"><!--[if gte mso 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Section1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in; mso-header-margin:.5in; mso-footer-margin:.5in; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]--><span style="font-size:85%;"><span style="line-height: 115%;font-family:verdana;font-size:10;" >Sometimes there are symptoms where this agent can cause the SCSI reservation conflict. This is mainly while this agent poll the SAN LUNs and get the report sent to mail address by using SNMP agents.</span></span>
<br />
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semihidden="false" unhidewhenused="false" qformat="true" name="Subtle Reference"> <w:lsdexception locked="false" priority="32" semihidden="false" unhidewhenused="false" qformat="true" name="Intense Reference"> <w:lsdexception locked="false" priority="33" semihidden="false" unhidewhenused="false" qformat="true" name="Book Title"> <w:lsdexception locked="false" priority="37" name="Bibliography"> <w:lsdexception locked="false" priority="39" qformat="true" name="TOC Heading"> </w:LatentStyles> </xml><![endif]--><style> <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:""; margin-top:0in; margin-right:0in; margin-bottom:10.0pt; margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} .MsoPapDefault {mso-style-type:export-only; margin-bottom:10.0pt; line-height:115%;} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.0in 1.0in 1.0in; mso-header-margin:1.0in; mso-footer-margin:1.0in; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} </style> <![endif]--> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">In order to disable the cmafcad (HP SIM Fibre Channel agent) from the entire HP SIM agent software without affecting the entire suite we need to follow the below procedure.<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">
<br /></span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">1. Log in to the ESX Server host console.<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">2. Use a text editor to open the file /opt/compaq/cma.conf.<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">3. Add cmafcad to the top of the file on the line starting with ‘exclude’.<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">
<br /></span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">Typically, after modification, the file will look like:<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"># Following entries were added by HP Insight Management Agents at<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">#<span style=""> </span>Sun Nov 19 23:25:15 CET 2006<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">exclude cpqasm cmhp cmafcad<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"># ---------------------- END #--------------------############################################################<span style=""> </span>#<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"># cma.conf: HP Insight Management Agents configuration file<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">4. Save the file and exit the editor.<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">5. Restart the management agents on the host.<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">
<br /></span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">Run the following commands to restart the management agents:<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;">
<br /></span></p><p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"># service hpasm restart<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"># service hpsmh restart<o:p></o:p></span></p> <p class="MsoNormal" style="margin-bottom: 0.0001pt; line-height: normal;font-family:verdana;"><span style="font-size:10;"># service cmanic restart<o:p></o:p></span></p>
<br />Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com2tag:blogger.com,1999:blog-7118971580202682778.post-62683489646488759562009-04-14T01:06:00.002+05:302009-04-14T01:18:06.303+05:30Thick Disk to Thin DiskI have came across many situations where people asked about thin provisioned disks for their VMs. Sometimes they already have their Thick Provisioned disks and want to convert all those disks to Thin Provisioned. So thought to create this post.<br /><br />This is the setup I did exclusively for you now on my LAB and below is the output.<br /><br />I have created a new Thick disk of 2GB using the command line and the output is as below:<br /><br />[root@virtualbox prasenjit]# <span style="font-weight: bold; color: rgb(153, 0, 0);">vmkfstools -c 2048m -d thick -a lsilogic test.vmdk</span><br /><br />[root@virtualbox prasenjit]# <span style="font-weight: bold; color: rgb(153, 0, 0);">ll</span><br />total 2097216<br />-rw------- 1 root root <span style="font-weight: bold; color: rgb(153, 0, 0);">2147483648</span> Nov 12 13:49 <span style="font-weight: bold; color: rgb(153, 0, 0);">test-flat.vmdk</span><br />-rw------- 1 root root 369 Nov 12 13:49 <span style="font-weight: bold; color: rgb(153, 0, 0);">test.vmdk</span><br /><br />Now I did a cat to the vmdk descriptor file and there is no hint of whether it is Thick or Thin. It means that this is a Thick disk.<br /><br />[root@virtualbox prasenjit]# <span style="font-weight: bold; color: rgb(153, 0, 0);">cat test.vmdk</span><br /># Disk DescriptorFile<br />version=1<br />CID=1e16e9e2<br />parentCID=ffffffff<br />createType="vmfs"<br /><br /># Extent description<br />RW 4194304 VMFS "test-flat.vmdk"<br /><br /># The Disk Data Base<br />#DDB<br /><br />ddb.virtualHWVersion = "4"<br />ddb.uuid = "60 00 C2 99 ab 52 a3 f6-83 3e 7c 91 77 14 15 42"<br />ddb.geometry.cylinders = "261"<br />ddb.geometry.heads = "255"<br />ddb.geometry.sectors = "63"<br />ddb.adapterType = "lsilogic"<br /><br />Now we have to do a clone of this disk in order to change the disk type and without losing any data on the disk.<br /><br />[root@virtualbox prasenjit]# <span style="font-weight: bold; color: rgb(153, 0, 0);">vmkfstools -i test.vmdk newfile.vmdk -d thin</span><br />Destination disk format: VMFS <span style="font-weight: bold; color: rgb(153, 0, 0);">thin-provisioned</span><br />Cloning disk 'test.vmdk'...<br />Clone: 100% done.<br /><br />[root@virtualbox prasenjit]# <span style="font-weight: bold; color: rgb(153, 0, 0);">ll</span><br />total 4124800<br />-rw------- 1 root root <span style="font-weight: bold; color: rgb(153, 0, 0);">2147483648</span> Nov 12 14:00 <span style="font-weight: bold; color: rgb(153, 0, 0);">newfile-flat.vmdk</span><br />-rw------- 1 root root 398 Nov 12 14:00 <span style="font-weight: bold; color: rgb(153, 0, 0);">newfile.vmdk</span><br />-rw------- 1 root root <span style="font-weight: bold; color: rgb(153, 0, 0);">2147483648</span> Nov 12 13:49 <span style="font-weight: bold; color: rgb(153, 0, 0);">test-flat.vmdk</span><br />-rw------- 1 root root 369 Nov 12 13:49 <span style="font-weight: bold; color: rgb(153, 0, 0);">test.vmdk</span><br /><br />Now if you can check the descriptor file for the new disk then it will say you that this is a Thin disk.<br /><br />[root@virtualbox prasenjit]# <span style="font-weight: bold; color: rgb(153, 0, 0);">cat newfile.vmdk</span><br /># Disk DescriptorFile<br />version=1<br />CID=1e16e9e2<br />parentCID=ffffffff<br />createType="vmfs"<br /><br /># Extent description<br />RW 4194304 VMFS "newfile-flat.vmdk"<br /><br /># The Disk Data Base<br />#DDB<br /><br />ddb.virtualHWVersion = "4"<br />ddb.uuid = "60 00 C2 97 84 b4 66 af-ef 29 f9 a9 2c 58 6f cc"<br />ddb.geometry.cylinders = "261"<br />ddb.geometry.heads = "255"<br />ddb.geometry.sectors = "63"<br />ddb.adapterType = "lsilogic"<br /><span style="font-weight: bold; color: rgb(153, 0, 0);">ddb.thinProvisioned = "1"</span>Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com3tag:blogger.com,1999:blog-7118971580202682778.post-52622473644669262152009-04-13T23:50:00.008+05:302009-04-14T00:50:38.643+05:30ESX Server 3.0.x/3.5/3i Boot Process<meta equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="PowerPoint.Slide"><meta equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="PowerPoint.Slide"><meta name="Generator" content="Microsoft PowerPoint 12"><span style="font-weight: bold;font-family:Arial;font-size:28;color:black;" ><span style="font-size:100%;">ESX Server 3.0.x/3.5 Boot Process</span>
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<br /></span></span><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1CpkBvSXilbSYCQw_FMjiLlDzk78ktgqN-d_bDbvMM6RlmyuPz0eHaWJsAXCUwKsvsNmjjqTflMR2VaVgLnzctrFUaM2VZqauXTZOcEW_y1dWEA7nxBsba9lIMKebxOpDzl-qRjoCM0lR/s1600-h/esx3.5.jpg"><img style="cursor: pointer; width: 320px; height: 168px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj1CpkBvSXilbSYCQw_FMjiLlDzk78ktgqN-d_bDbvMM6RlmyuPz0eHaWJsAXCUwKsvsNmjjqTflMR2VaVgLnzctrFUaM2VZqauXTZOcEW_y1dWEA7nxBsba9lIMKebxOpDzl-qRjoCM0lR/s320/esx3.5.jpg" alt="" id="BLOGGER_PHOTO_ID_5324248504721309906" border="0" /></a>
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<br /><meta name="ProgId" content="PowerPoint.Slide"><meta name="Generator" content="Microsoft PowerPoint 12"> <ol><li><span style="font-weight: bold;font-family:Arial;font-size:85%;color:black;" >Boot loa</span><span style="font-weight: bold;font-family:Arial;font-size:85%;color:black;" >der in MBR points to the boot device</span></li><li><span style="font-weight: bold;font-family:Arial;font-size:85%;color:black;" >Grub.conf</span><span style="font-weight: bold;font-family:Arial;font-size:85%;color:black;" > lists the boot menu options.</span></li><li><span style="font-weight: bold;font-family:Arial;font-size:85%;color:black;" >Selected menu provides:</span></li></ol> <ul><li><span style=";font-family:Arial;font-size:85%;color:black;" > Location of root partition. Uses UUID instead of device</span>
<br /><span style=";font-family:Arial;font-size:85%;color:black;" > name (e.g. /dev/</span><span style=";font-family:Arial;font-size:85%;color:black;" >sda</span><span style=";font-family:Arial;font-size:85%;color:black;" >)</span> </li><li><span style=";font-family:Arial;font-size:85%;color:black;" >RAM Disk file name relative to /boot location</span></li></ul>
<br /><span style="font-weight: bold;font-family:Arial;font-size:28;color:black;" ><span style="font-size:100%;">ESX Server 3i Boot Process</span></span>
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<br /><a onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}" href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRBJEZrC-J_WpJWUyCSaSOWVkbFEigdJjlSVU_wq5kpXOmmwGTrytlPTdDItrlt0Vuc5rJwMcaJA_QP60v2g8qA2g1c8YgzkMNKc9YWEvq19t0_g_hQUxw42qKKAX_bbIKxjlJx2SXxEOy/s1600-h/esx3i.jpg"><img style="cursor: pointer; width: 320px; height: 200px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhRBJEZrC-J_WpJWUyCSaSOWVkbFEigdJjlSVU_wq5kpXOmmwGTrytlPTdDItrlt0Vuc5rJwMcaJA_QP60v2g8qA2g1c8YgzkMNKc9YWEvq19t0_g_hQUxw42qKKAX_bbIKxjlJx2SXxEOy/s320/esx3i.jpg" alt="" id="BLOGGER_PHOTO_ID_5324249384061833682" border="0" /></a>
<br /><meta equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="PowerPoint.Slide"><meta name="Generator" content="Microsoft PowerPoint 12"> <ul><li><span style="font-size:85%;"><span style="font-weight: bold;font-family:verdana;" >Boot loader in MBR points to the boot device</span></span></li><li><span style="font-size:85%;"><span style="font-weight: bold;font-family:verdana;" >initrd (initial Ram disk) is loaded</span></span></li></ul>
<br /><span style="font-weight: bold;font-size:180%;" ><span style="font-family:verdana;">ESXi Boot Sequence</span></span>
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<br /><span style="font-family:verdana;">ESXi firmware boot starts from grub screen</span> <div style="text-align: left;"><ol><li><span style="font-family:verdana;"> Hypervisor loads necessary drivers</span></li><li><span style="font-family:verdana;"> Hypervisor runs config scripts</span></li><li><span style="font-family:verdana;"> Hypervisor starts daemons (services)</span></li><li><span style="font-family:verdana;"> Boot process ends when DCUI screen is loaded</span></li></ol></div><ul><li><span style="font-family:verdana;"> Alt+F2 : DCUI (Default)</span></li><li><span style="font-family:verdana;"> Alt+F1: inactive console</span></li><li><span style="font-family:verdana;"> Alt+F11 : Summary information (version, server, CPU, memory)</span></li><li><span style="font-family:verdana;"> Alt+F12 : vmkernel log</span></li></ul>
<br />Virtualboxhttp://www.blogger.com/profile/16208878515938835399noreply@blogger.com5