Re: [rdiff-backup-users] Failover to warm standby and restore

[Jakob Unterwurzacher]

address@hidden schrieb:
> Dear all,
> 
> A friend recommended that I use rdiff-backup to maintain a back up of an 
> inconveniently large, reasonably slowly changing file repository.
> 
> I would like to keep the back up copy on a warm standby system, so that if 
> the primary host fails, I can reconfigure the standby to replace it.
> 
> I understand that modifying the back up files will invalidate the rdiff 
> snapshots.
> 
> Is there a sane way of keeping the snapshots valid that does not involve 
> maintaining a second back-up copy?

I think you will need LVM snapshots for this.

When the standby goes hot, create a read/write snapshot of the backup,
make that snapshot available to the clients.

> 
> When the primary host comes back up, are there any extraordinary 
> considerations for updating its repository ?

You will have to push the changes in the snapshot somehow to the primary
(rsync -au ?).

Then you can destroy the snapshot and do business as usual.



Jakob