On Mon, Nov 22, 2010 at 10:26:30AM -0500, Jonathan Stewart wrote: > On 11/22/2010 6:35 AM, Andrew Reilly wrote: > >Dump/restore doesn't work for ZFS. I *think* that I'm running > >backups in the appropriate equivalent fashion: I take file > >system snapshots (both absolute == level 0) and relative > >(incremental), and zfs send those to files on the backup disk. > > This is actively discouraged, there is no recovery ability when > receiving zfs streams so 1 bad bit would invalidate your entire backup.
Hmm. Isn't that a problem that also affects the "sending snapshots" scheme that you describe, below? > The currently accepted practice is to create a ZFS file system on the > backup drive and just keep sending incremental snapshots to it. As long > as the backup drive and host system have a snapshot in common you can do > incremental transfers. This way you only have to keep the most recent > snapshot on the main system and can keep as many as you have space for > on the backup drive. You also have direct access to any backed up > version of every file. That sounds like a very cool notion. Not unlike the time-machine scheme. Interesting how different capabilities require going back and re-thinking the problem, rather than just trying to implement the old solution with the new tools. I'll see how I go with it... Cheers, -- Andrew _______________________________________________ freebsd-stable@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
