ZFS backups: retrieving a few files?
jonathan at kc8onw.net
Mon Nov 22 22:22:41 UTC 2010
On 11/22/2010 5:13 PM, Andrew Reilly wrote:
> 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?
When sending the snapshots to a new file system you know right away
whether they are bad or not. Otherwise you find out when you are trying
to restore and your backups are bad... A send could fail but you can
always retry that, you can't retry anything when your trying to restore.
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