We are using Netapp as our backend for vmdk files on a NFS volume with de-duplication enabled. I am keeping two weeks worth of snapshots. Currently there are two NFS volumes, 4 ESX host server and about 60 guest servers. We are adding about 2 -3 virtual servers a week. What I am noticing that snap shot is taking a lot of space. I have set the reserve to 30% but it is taking about 35% per volume. Couple of times it has happened that a snap shot will happen during the day and the volume will be almost out of space and then VM guest will go offline as there is no log space to write. Once we clear space the guest machines come back on line. Is this normal for a VM storage volume to take up so much space in snap shot? We are getting almost 50% gain by doing deduplication which is pretty good. Any suggestion is appreciated.

Mustafa Sayla

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