Comments on: Fault Tolerant capable CPUs that are not Fault Tolerant compatible http://vmguy.com/wordpress/index.php/archives/1219 Virtualization for the little guy Fri, 27 Jan 2012 15:54:17 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: The VMguy http://vmguy.com/wordpress/index.php/archives/1219/comment-page-1#comment-651 The VMguy Thu, 19 Nov 2009 02:41:21 +0000 http://VMGUY.COM/wordpress/?p=1219#comment-651 Correct, currently you can not do SMP VM's as Fault Tolerant pairs. However, having said that, I don't believe any other hypervisors can do Fault Tolerance at all if I'm not mistaken. (Sorry if I sound a little arrogant there, it's just really cool technology that no one else does). -Dave Correct, currently you can not do SMP VM’s as Fault Tolerant pairs. However, having said that, I don’t believe any other hypervisors can do Fault Tolerance at all if I’m not mistaken. (Sorry if I sound a little arrogant there, it’s just really cool technology that no one else does).

-Dave

]]> By: Ken Donoghue http://vmguy.com/wordpress/index.php/archives/1219/comment-page-1#comment-648 Ken Donoghue Tue, 17 Nov 2009 14:32:51 +0000 http://VMGUY.COM/wordpress/?p=1219#comment-648 It's interesting that, after going through the bother of matching processors on multiple servers, VMware FT can make use of only one core per processor. VMware FT is not SMP compatible. It’s interesting that, after going through the bother of matching processors on multiple servers, VMware FT can make use of only one core per processor. VMware FT is not SMP compatible.

]]> By: Datto http://vmguy.com/wordpress/index.php/archives/1219/comment-page-1#comment-638 Datto Wed, 11 Nov 2009 02:56:36 +0000 http://VMGUY.COM/wordpress/?p=1219#comment-638 Just wanted to add that less expensive AMD Athlon X2 Kuma model CPUs and AMD X4 Phenom 9650 CPUs will do VMware FT with Opteron Quad 1352, 1354, 1356 CPUs (or between themselves), although not in a supported configuration since only the Opteron CPUs are supported. Also, expanding upon what was said above about VMware FT not working with nested ESX hosts, it may appear that VMware FT works initially but after a short while the syncing efforts between the Primary and the Secondary VMs can't keep up and eventually communication with the Secondary VM will stop. Datto Just wanted to add that less expensive AMD Athlon X2 Kuma model CPUs and AMD X4 Phenom 9650 CPUs will do VMware FT with Opteron Quad 1352, 1354, 1356 CPUs (or between themselves), although not in a supported configuration since only the Opteron CPUs are supported.

Also, expanding upon what was said above about VMware FT not working with nested ESX hosts, it may appear that VMware FT works initially but after a short while the syncing efforts between the Primary and the Secondary VMs can’t keep up and eventually communication with the Secondary VM will stop.

Datto

]]> By: The VMguy http://vmguy.com/wordpress/index.php/archives/1219/comment-page-1#comment-637 The VMguy Wed, 11 Nov 2009 01:45:30 +0000 http://VMGUY.COM/wordpress/?p=1219#comment-637 Yes, vCenter will check to make sure that FT will work before you enable it. You can also use the site survey tool to find out if you can use FT on your hardware before you install it (http://www.vmware.com/download/shared_utilities.html). You cannot run FT when running ESX nested (Esx running inside a VM). Yes, vCenter will check to make sure that FT will work before you enable it. You can also use the site survey tool to find out if you can use FT on your hardware before you install it (http://www.vmware.com/download/shared_utilities.html).

You cannot run FT when running ESX nested (Esx running inside a VM).

]]> By: Michael McNamara http://vmguy.com/wordpress/index.php/archives/1219/comment-page-1#comment-636 Michael McNamara Tue, 10 Nov 2009 23:44:30 +0000 http://VMGUY.COM/wordpress/?p=1219#comment-636 Hi Dave, I appreciate the great information you provide on this blog, top notch stuff. We implemented VMWare's vSphere 4 a few months back and heard this limitation repeated by both VMWare's folks and the reseller we had engaged to help us. I don't believe the vSphere client will even let you enable FT if the two hosts aren't compatible will it? Also what about running FT within a nested VMWare vSphere 4 cluster, a VM environment within a VM environment? I didn't actually realize until recently you could run nested VM environments at all. Cheers! Hi Dave,

I appreciate the great information you provide on this blog, top notch stuff.

We implemented VMWare’s vSphere 4 a few months back and heard this limitation repeated by both VMWare’s folks and the reseller we had engaged to help us. I don’t believe the vSphere client will even let you enable FT if the two hosts aren’t compatible will it?

Also what about running FT within a nested VMWare vSphere 4 cluster, a VM environment within a VM environment? I didn’t actually realize until recently you could run nested VM environments at all.

Cheers!

]]> By: NiTRo http://vmguy.com/wordpress/index.php/archives/1219/comment-page-1#comment-634 NiTRo Tue, 10 Nov 2009 19:43:44 +0000 http://VMGUY.COM/wordpress/?p=1219#comment-634 Interesting, does the Check Compliance function highlight that ? Interesting, does the Check Compliance function highlight that ?

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