>From: Fco Javier Garcia >Sent: Tuesday, June 15, 2010 11:21 AM > >> Realistically, I think people are overtly-enamored with dedup as a >> feature - I would generally only consider it worth-while in cases >> where you get significant savings. And by significant, I'm talking an >> order of magnitude space savings. A 2x savings isn't really enough to >> counteract the down sides. Especially when even enterprise disk space >> is >> (relatively) cheap. >> > > >I think dedup may have its greatest appeal in VDI environments (think about a >environment with 85% if the data that the virtual machine needs is into ARC or >L2ARC... is like a dream...almost instantaneous response... and you can boot a >new machine in a few seconds)... >
Does dedup benefit in the ARC/L2ARC space? For some reason, I have it in my head that for each time it requests the block from storage it will copy it into cache; therefore if I had 10 VMs requesting the same dedup'd block, there will be 10 copies of the same block in ARC/L2ARC. Geoff _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
