On Wed, September 16, 2009 02:11, Carson Gaspar wrote: > "zfs recv" of a full > stream will create a new filesystem of the appropriate version, which you > may > then "zfs upgrade" if you wish. And restoring incrementals to a different > fs rev > doesn't make sense. As long as support for older fs versions isn't removed > from the kernel, this shouldn't ever be a problem.
It's routine to go back into old incrementals for single-file recovery, in my experience over 40 years of backup strategies. But you can't do that at all with saved zfs send streams. This is another example of how a ZFS SEND stream isn't exactly a backup. I'm going with a strategy where the way I get old files back is from snapshots on either the main filesystem, or one of the backup filesystems, and send/receive are to be used only as communication channels between filesystems. But that does increase the size of the backup filesystems, if I keep any large amount of old snapshots around. Sun says roughly that if you want enterprise backup of ZFS filesystems, you should use an enterprise backup product, and I think I see their point on this one. -- David Dyer-Bennet, d...@dd-b.net; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
