On 7/11/07, Matthew Ahrens <[EMAIL PROTECTED]> wrote: > > This "restore problem" is my key worry in deploying ZFS in the area > > where I see it as most beneficial. Another solution that would deal > > with the same problem is block-level deduplication. So far my queries > > in this area have been met with silence. > > I must have missed your messages on deduplication.
That's OK... I think that I probably spill my guts adequately on the topic at: http://mail.opensolaris.org/pipermail/zfs-discuss/2006-August/034065.html http://mail.opensolaris.org/pipermail/zfs-discuss/2007-April/040034.html http://mail.opensolaris.org/pipermail/storage-discuss/2007-May/002711.html The only previous thread that seemed to have much discussion was http://mail.opensolaris.org/pipermail/zfs-discuss/2007-January/ > But did you see this > thread on it? "zfs space efficiency", 6/24 - 7/7? I stopped reading the "zfs space efficiency" thread just before it got interesting. :) The dedup methods suggested there are quite consistent with those that I had previously suggested. > > We've been thinking about ZFS dedup for some time, and want to do it but have > other priorities at the moment. This is very good to hear. > > Hmmm... I just ran into another snag with this. I had been assuming > > that clones and snapshots were more closely related. But when I tried > > to send the differences between the source of a clone and a snapshot > > within that clone I got this message: > > I'm not sure what you mean by "more closely related". The only reason we > don't support that is because we haven't gotten around to adding the special > cases and error checking for it (and I think you're the first person to notice > its omission). But it's actually in the works now so stay tuned for an update > in a few months. I was trying to say (but didn't) that I thought that there should be nearly (very important word) no differences between finding the differences from a clone's origin to a snapshot of the clone and finding the differences between snapshots between snapshots of the same file system. I'm also glad to see this is in the works. Most of my use cases for ZFS involve use of clones. Lack of space-efficient backups and especially restores makes me wait to use ZFS outside of the lab. Mike -- Mike Gerdts http://mgerdts.blogspot.com/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
