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Hi Thibault,
Instead of backing up, individual bricks or the entire thin
logical volume, you can take a gluster volume snapshot, and you
will have a point in time backup of the volume.
gluster snapshots internally use thin lv snapshots, so you can't
move the backup out of the system. Also having the backup on the
same filesystem as the data doesn't protect you from device
failure scenarios. However in events of any other data loss or
corruption, you can restore the volume from the snapshot, mount
the read-only snapshot and copy the necessary files.
In order to take backup at a remore site, using geo-rep is
recommended.
Regards,
Avra
On 08/17/2015 02:27 PM, Thibault Godouet wrote:
I have a 1 x 2 = 2 volume geo-replicated to a
single-brick volume in another physical site, where I would like
to set up a backup.
I could setup a backup on a mount of the volume, but
a quick test shows it is slow in this setup (presumably because
there are loads of small files on there).
Instead I thought I could maybe backup the filesystem
where the brick is (or rather a snapshot of the thin logical
volume). My understanding is that all the files will be in
there, and readable, so it seems to me it would be fine to back
things up from there.
Is that right, or am I missing something here?
Note the .glusterfs directory would also be backed up
too, although I'm not sure whether that would be of any use in a
backup.
More generally is there a recommended way to setup
backups?
Thanks,
Thibault.
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