On Wed, May 04, 2011 at 08:49:03PM -0700, Edward Ned Harvey wrote: > > From: Tim Cook [mailto:t...@cook.ms] > > > > That's patently false. VM images are the absolute best use-case for dedup > > outside of backup workloads. I'm not sure who told you/where you got the > > idea that VM images are not ripe for dedup, but it's wrong. > > Well, I got that idea from this list. I said a little bit about why I > believed it was true ... about dedup being ineffective for VM's ... Would > you care to describe a use case where dedup would be effective for a VM? Or > perhaps cite something specific, instead of just wiping the whole thing and > saying "patently false?" I don't feel like this comment was productive... >
We use dedupe on our VMware datastores and typically see 50% savings, often times more. We do of course keep "like" VM's on the same volume (at this point nothing more than groups of Windows VM's, Linux VM's and so on). Note that this isn't on ZFS (yet), but we hope to begin experimenting with it soon (using NexentaStor). Apologies for devolving the conversation too much in the NetApp direction -- simply was a point of reference for me to get a better understanding of things on the ZFS side. :) Ray _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
