Can VMs on clustered storage use?

I have install a cluster on ESX 3.5 and experience some SAN LUNS available (as shared on a Clariion AX4-5 storage). Virtual machines currently use local storage to each host in the cluster and they were previously separate hosts but I grouped in a cluster recently. My plan is to migrate VMs for storing shared little by little, as I'm not sure if SAN Bay can manage all virtual machines, without there being issues with degradation IO (I'm imagining 20 Windows operating system running a variety - it may be good but it seems to me that there could be performance problems). I intend to have HA and DRS working on this cluster (possibly - at the moment they are not enabled). I currently have 16 VMs Windows through host 2. The majority of these servers are servers of file/application for general purposes; There are a few small DBs and a low load Citrix server, but they will have huge needs IO. One of the virtual machines will be the new main file server so will have random reads/writes, but should not be too heavy.

Some of the virtual machines are not mission critical and not really need HA and I plan to keep the latter on the local storage if possible to maintain the highest possible IO for important servers. I plan to move virtual machines from shared storage one and then make sure that there are no obvious performance problems.

What would be the best way to do this? I keep some virtual machines on the local storage and the best way to configure the cluster/VMs for this? If I can isolate each VM cluster parameters, etc. ?

Any tips will be appreciated.

See you soon,.

Tim

P.S. I'm worrying unecessarily on SAN i/o performance?

Yes, they can be in a cluster and use local storage - but just make sure that you disable HA for this virtual machine in the by the parameters of the virtual machine and do the same for the SRD if DRS is enabled

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Tags: VMware

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