Date: Mon, 11 Jan 2016 16:20:51 -0500 From: Paul Kraus <paul@kraus-haus.org> To: lev@FreeBSD.org Cc: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: Re: Restore only several files from ZFS snapshot without creating copy of them? Message-ID: <C6068E3B-39EA-44FF-A8E6-E8067E51DE63@kraus-haus.org> In-Reply-To: <133976260.20160110023807@serebryakov.spb.ru> References: <133976260.20160110023807@serebryakov.spb.ru>
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On Jan 9, 2016, at 18:38, Lev Serebryakov <lev@FreeBSD.org> wrote: > Hello FreeBSD, > > I have a ZFS filesystem, which have daily snapshots. User removed several > multi-gigabyte files by accident and need to get them back. These files are > present in old daily snapshots, allright. But as far as I understnad, if I > do > > cp /fs/.zfs/snapshots/old-snapshot/file /fs/file > > I got TWO copies of this file (one in live filesystem and future snapshots > and other one in old snapshots). As files in question are multi-gigabyte > (about 100G alltogether) I don't want such duplication (dedup is turned off, > as it is very memory-consuming). > > Is it possible to restore these files without such data duplication? Could you leverage a CLONE of the snapshot until such time as other snapshots of these large files have expired (assuming you are expiring and destroying old snapshots after a certain amount of time) ? I am trying to think out of the box here and have to completely thought all this through. -- Paul Kraus paul@kraus-haus.org
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