Comments on: VMDirectPath? Paravirtual SCSI? – vSphere VM Options and You! http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/ How Many Turtles Can You Fit On A Rock? Sat, 31 Jul 2010 19:59:12 -0500 http://wordpress.org/?v=2.9.2 hourly 1 By: tiffany1111 http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-1070 tiffany1111 Wed, 30 Dec 2009 13:39:56 +0000 http://professionalvmware.com/?p=808#comment-1070 <a href="http://www.uggsky.info/ugg-classic-mini-boots-c-2.html" target="_blank" rel="nofollow">mini ugg boots</a><br><a href="http://www.uggsky.info/ugg-classic-mini-boots-c-2.html" target="_blank" rel="nofollow">classic ugg mini</a><br><a href="http://www.uggsky.info/ugg-classic-mini-boots-c-2.html" target="_blank" rel="nofollow">ugg classic mini boots</a><br><br><a href="http://www.uggsky.info/ugg-classic-tall-bomber-jacket-c-7.html" target="_blank" rel="nofollow">UGG Classic Tall for sale</a><br><br><a href="http://www.uggsky.info/ugg-nightfall-boots-c-10.html" target="_blank" rel="nofollow">uggs nightfall</a><br><a href="http://www.uggsky.info/ugg-nightfall-boots-c-10.html" target="_blank" rel="nofollow">nightfall uggs</a><br><a href="http://www.uggsky.info/ugg-nightfall-boots-c-10.html" target="_blank" rel="nofollow">nightfall ugg boots</a><br><a href="http://www.uggsky.info/ugg-nightfall-boots-c-10.html" target="_blank" rel="nofollow">nightfall ugg</a><br><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">UGG Sundance Boots</a><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">UGG Sundance Boot</a><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">Boot Sundance Ugg</a><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">UGG Sundance</a><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">ugg boots sundance</a><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">ugg sundance boots cheap</a><br><a href="http://www.uggsky.info/ugg-sundance-boots-c-11.html" target="_blank" rel="nofollow">ugg sundance black</a><br><br><a href="http://www.uggsky.info/ugg-lo-pro-button-c-14.html" target="_blank" rel="nofollow">shoes ugg</a><br><a href="http://www.uggsky.info/ugg-lo-pro-button-c-14.html" target="_blank" rel="nofollow">uggs shoes</a><br><a href="http://www.uggsky.info/ugg-lo-pro-button-c-14.html" target="_blank" rel="nofollow">ugg boots online</a><br><a href="http://www.uggsky.info/ugg-lo-pro-button-c-14.html" target="_blank" rel="nofollow">cheap uggs online</a><br><a href="http://www.uggsky.info/ugg-new-arrival-boots-c-15.html" target="_blank" rel="nofollow">UGG New Arrival boots</a><br><br><a href="http://www.uggsky.info/ugg-new-arrival-boots-c-15.html" target="_blank" rel="nofollow">new ugg boots</a><br><a href="http://www.uggsky.info/ugg-new-arrival-boots-c-15.html" target="_blank" rel="nofollow">new uggs</a> mini ugg boots
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]]> By: VCP4 Online Study Group Follow-Up http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-829 VCP4 Online Study Group Follow-Up Fri, 18 Dec 2009 14:03:56 +0000 http://professionalvmware.com/?p=808#comment-829 [...] Direct Path IO [...] [...] Direct Path IO [...]

]]> By: renecarrier http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-844 renecarrier Thu, 01 Oct 2009 20:32:35 +0000 http://professionalvmware.com/?p=808#comment-844 Helpful with a bit of humor. It was pleasant to read.<br>Good overview article. Helpful with a bit of humor. It was pleasant to read.
Good overview article.

]]> By: renecarrier http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-692 renecarrier Thu, 01 Oct 2009 15:32:35 +0000 http://professionalvmware.com/?p=808#comment-692 Helpful with a bit of humor. It was pleasant to read.<br>Good overview article. Helpful with a bit of humor. It was pleasant to read.
Good overview article.

]]> By: phys2virt http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-588 phys2virt Fri, 04 Sep 2009 04:43:42 +0000 http://professionalvmware.com/?p=808#comment-588 BTW, someone was asking about drivers in vSphere for VMDirectPath. <br><br>Answer: VMDirectPath needs driver for whatever guest OS that you have Passthrough-ed device to. For example, if you assigned Emulex HBA to a windows 2008 VM, you need Emulex windows 2008 driver to talk to the device not a driver running in ESX. <br><br>Also anyone trying GPUs, make sure those nVidia supports your model for PCIPassthrough/VMDirectPath and you need their new driver as well.<br><br>BTW, I am not sure if any of you saw this, ATI/AMD demo-ed their GPU Passthrough at VMworld as well. BTW, someone was asking about drivers in vSphere for VMDirectPath.

Answer: VMDirectPath needs driver for whatever guest OS that you have Passthrough-ed device to. For example, if you assigned Emulex HBA to a windows 2008 VM, you need Emulex windows 2008 driver to talk to the device not a driver running in ESX.

Also anyone trying GPUs, make sure those nVidia supports your model for PCIPassthrough/VMDirectPath and you need their new driver as well.

BTW, I am not sure if any of you saw this, ATI/AMD demo-ed their GPU Passthrough at VMworld as well.

]]> By: phys2virt http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-587 phys2virt Fri, 04 Sep 2009 04:02:12 +0000 http://professionalvmware.com/?p=808#comment-587 Technically VMDirectPath alows passing any PCI device to a VM (It is same PCI Passthrough so what DemitasseNZ says in comment #1 is not true). Of course there are some caveats with respect how drivers/device behave when a device is passthroughed to a VM (since ESX sets up the virtual PCI address to physical PCI address). But for most common cases, things should work. <br><br>vSphere 4 only announced support for few storage & network controllers because that is what *people* thought it was going to be used (and were tested internally) for but turned out that we have had few customers try GPUs, ISDN cards, SSL encryption cards, etc., and they worked fine even though VMware does not officially support those devices yet. In theory they can be added to list of supported devices as soon as there is good business justification since it involves testing and supporting them. Technically VMDirectPath alows passing any PCI device to a VM (It is same PCI Passthrough so what DemitasseNZ says in comment #1 is not true). Of course there are some caveats with respect how drivers/device behave when a device is passthroughed to a VM (since ESX sets up the virtual PCI address to physical PCI address). But for most common cases, things should work.

vSphere 4 only announced support for few storage & network controllers because that is what *people* thought it was going to be used (and were tested internally) for but turned out that we have had few customers try GPUs, ISDN cards, SSL encryption cards, etc., and they worked fine even though VMware does not officially support those devices yet. In theory they can be added to list of supported devices as soon as there is good business justification since it involves testing and supporting them.

]]> By: JoshA http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-554 JoshA Tue, 25 Aug 2009 20:11:54 +0000 http://professionalvmware.com/?p=808#comment-554 Thanks for the post. I am curious as to why Device Hot Add is a lost feature when using VMDirectPath. Anyone have any insight? Thanks for the post. I am curious as to why Device Hot Add is a lost feature when using VMDirectPath. Anyone have any insight?

]]> By: professionalvmware http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-550 professionalvmware Mon, 24 Aug 2009 10:26:08 +0000 http://professionalvmware.com/?p=808#comment-550 I do not believe so, however, there are only a few cards specifically<br>supported for VMDirectPath at this time.<br><br>-C I do not believe so, however, there are only a few cards specifically
supported for VMDirectPath at this time.

-C

]]> By: Andre http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-549 Andre Mon, 24 Aug 2009 09:02:05 +0000 http://professionalvmware.com/?p=808#comment-549 Does VMDirectPath I/O require VSphere to have the correct driver for the PCI and PCIe device? Does VMDirectPath I/O require VSphere to have the correct driver for the PCI and PCIe device?

]]> By: mikeconroy http://professionalvmware.com/2009/08/vmdirectpath-paravirtual-scsi-vsphere-vm-options-and-you/comment-page-1/#comment-538 mikeconroy Thu, 20 Aug 2009 18:50:47 +0000 http://professionalvmware.com/?p=808#comment-538 Thanks for bring this up. I have heard VMDirectPath is targeted at guests running MSFT SQL Server to improve performance. Any thoughts on that particular use case? Any idea if there is a limit on the number of guests per hosts using VMDirectPath? Thanks for bring this up. I have heard VMDirectPath is targeted at guests running MSFT SQL Server to improve performance. Any thoughts on that particular use case? Any idea if there is a limit on the number of guests per hosts using VMDirectPath?

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