[plug] backup script

[Craig Ringer]

Jon Miller wrote:
> unfortunately, the email system at that time was undergoing some changes and a lot of my mail has been deleted.

The archives are online. Alternately, I'm happy to provide you with the 
appropriate time periods in MBOX format.

BTW, would it be useful to anybody to have anonymous IMAP access to the 
PLUG archives? I /may/ be able to offer that using the Cyrus server here 
at the POST.

> What I require this time is a simple daily backup of either the entire server on a AIT drive that is on the same system each night. 
 >  If I'm corect (pls correct me if I'm wrong) in order to use dd the 
partition would need to be dismounted.

Correct. You can use LVM snapshots to get around this, though - the 
snapshot will may need a journal replay when restored, but will be 
consistent and safe to use.

> We just want to get a copy of the data and certain partitions on the backup tape. 

find /var /usr | cpio -i | ssh $BACKUPSERVER 'dd of=/dev/st0'

?

Note that you should probably snapshot the volume and mount the snapshot 
on a temporary mountpoint. This avoids all sorts of nasty issues - the 
alternative is stopping any services that might write to the partition 
while it's being backed up, or living with the risk of an inconsistent 
backup.

> I'm currently looking at ArcServe for Linux, but there is still more testing to be done before I implement this solution.  In the meantime I'm just looking for a script that can copy the data and certain files each night and eject the tape so it can be changed on a daily basis.
> Is there a searchable archive that I access to view the previous question.?

Certainly. http://www.cantech.net.au/plug/ . Unfortunately the search 
appears unable to cope with the size of the archive, but I'm happy to 
provide MBOX copies.

Craig Ringer

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