Restoring and snapshots
ml at netfence.it
Sun Apr 12 05:19:07 UTC 2020
On 2020-04-12 00:18, David Christensen wrote:
> I am confused:
> * What is the type of the filesystem that was the source of the backup?
ZFS in the example above, but I've got the same problem with UFS, as I
also use snapshot there.
> * What tool(s) did you use to backup?
Sometimes Bacula, sometimes some custom scripts.
> * What is the type of the filesystem that was the destination of the
Could be UFS, bacula volumes, tapes, ZIPs, etc...
> * What tool(s) are you using to restore?
Again either Bacula or some custom scripts.
> * What is the type of the filesystem that is the destination of the
Usually UFS or ZFS; could be something else.
> So, the backup source filesystem and the restore destination filesystems
> are both ZFS (?).
Possibly, but not always.
> The upper Unix filesystem path should be an empty directory.
Should, but not always is.
Sometimes I found "forgotten" files in the directory which is the target
of the nullfs mount. Of course those files are usually hidden and
probably useless, but must be taken into account.
> I believe it is a result of the 'mountpoint' properties of the two ZFS
> file systems and how ZFS represents filesystem snapshots in the Unix
> file system.
No, this can happen with UFS too.
bye & Thanks
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