The Real (and Virtual) Adventures of Nathan the IT Guy

Sep 26 2009   5:01AM GMT

DRS, Vmotion, and Snapshots

Nathan Simon Nathan Simon Profile: Nathan Simon

I think setting DRS(Distributed Resource Scheduling) to manual mode when removing snapshots, should be best practice, especially when you are only running two ESX servers and they are slightly taxed. Why? Mainly because when you remove a snapshot, especially a two tiered one, it can cause the hard disk to “thrash” and thus signaling DRS to Vmotion a Virtual Machine from one ESX Server to the other ESX Server automatically. This will of course cause more stress on the hardware and eventually the client may notice the decrease in performance. Hey I’m just speaking from personal experience. When the snapshot is removed, re-enable DRS. Comments?

-NS

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