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New in vSphere 5.1–Support for five node Failover Clusters

As has been the case with the last few vSphere releases, VMware has crammed vSphere 5.1 full of new features and functionality. I won’t try to go into all of the details since there are many blog posts out there already. Since virtualizing business critical applications is near and dear to my heart, one of the changes that immediately jumped out to me is a big change to the support for virtualized Windows Failover Clusters.  Since the first version of

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Right or wrong, go with what’s supported…

There has been a lot of drama recently between Microsoft and VMware with respect to virtualizing Exchange 2010.  The background and details are summarized well in this article (in which I’m quoted).  I think this situation brings up some important points about virtualizing critical Tier 1 applications – vendor support is very important, and disregarding vendor requirements for support can lead to problems when you need support the most. There are a number of seemingly strange support requirements from Microsoft
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vMotion of clustered VMs is supported in vSphere 4.1..or is it?

While looking over some of the new vSphere 4.1 documentation I noticed that VMware had updated their Setup for Failover Clustering and Microsoft Cluster Service document.  As clustering becomes a bigger component of Microsoft’s enterprise applications, support for clustering in vSphere becomes even more important. As in previous versions of this document they list the limitations for clustering on vSphere.  The list of limitation is below: The following environments and functions are not supported for MSCS setups with this release
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