Date: Wed, 8 Aug 2012 12:08:53 -0400 From: "Brian Gold" <bgold@simons-rock.edu> To: "'Freddie Cash'" <fjwcash@gmail.com> Cc: freebsd-fs@freebsd.org Subject: RE: undoing zfs deduplication Message-ID: <0c9d01cd7580$1b8ecee0$52ac6ca0$@simons-rock.edu> In-Reply-To: <CAOjFWZ5fAF54G%2BoYGPOXRK0ePAbP-MV6-CA2SJGxR6oMgO1Daw@mail.gmail.com> References: <0c8801cd757a$601018e0$20304aa0$@simons-rock.edu> <CAOjFWZ5fAF54G%2BoYGPOXRK0ePAbP-MV6-CA2SJGxR6oMgO1Daw@mail.gmail.com>
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> Yes, that is the only option for "un-deduping" a filesystem. > > zfs send/recv from the deduped filesystem to one with dedup=off. Then delete the deduped filesystem. > > Note: a "zfs destroy" will use a lot of RAM as it has to go through an update all the DDT entries. You may have to manually delete > individual snapshots, and then manually delete individual directories in the filesystem, before destroying the actual filesystem. You > may run into a situation where you don't have enough RAM/ARC to destroy a deduped filesystem. > > -- > Freddie Cash > fjwcash@gmail.com >From what I've read so far, it looks like a "zfs send -R" would send the filesystem and all of the snapshots I've made. So would something like this work to move the duped filesystem and all of its snapshots over to a new undeduped filesystem: "zfs send -R backup/duped | zfs receive -duv backup/deduped" ?help
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