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1088

May 21st, 2008 12:00

VMware Infrastructure Resources not utilized

I have installed 2 ESX servers on a system with 2gb of
ram and 4x3ghz cpu's and placed them in a cluster. I used vmware convert to copy our LAMP server to
Vmware. The clusters total CPU and ram is correct but when the VM is under heavy
load it never uses any of the resources from the second ESX server. Im
looking under cluster1->Hosts
The %cpu and %mem on Host1 is always 0 and 11 respective, and the %cpu and $mem on host2 is 93 and 99.
Am I misunderstanding
something here? Doesnt a VM on Host1 use the resources of host2 when host1 is expended?

342 Posts

May 21st, 2008 12:00

A VM can only use the resources of the physical host on which it is residing. The interconnects between hosts is the network, and network latencies make it impractical to share CPU and memory across that link.

The main advantage of having a VMware cluster is the ability to use VMotion to MOVE the VM to physical hosts that have more resources for that particular VM.
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