[GLLUG] Ubuntu Server Failover

[James Hawtin]

On 02/08/13 10:54, Jean van Wyngaardt wrote:
> Hello Guys
>
> Anyone have a good experience setting up a failover server, that also replicates the data from a master server?
>
> I would assume rsync would do nicely for the data side, but I haven't really messed around too much with any failover apps before. Anyone have any favourites?
>
> Jean
>
It all depends how "out of sync" you don't mind your data to be. If your 
looking for something largely in sync, shared storage solutions like 
ceph or drdb are perhaps the way to go. If however you don;t mind things 
being more out of sync, like I do with my email, then rsync is a good 
solution, I host my mail server on a vps, rather than backing up the 
whole thing, once a day I shutdown the mail server, snap shot the 
filesystem, start the mail server, mount the snapshot, then resync that 
to my home server (this means that the data is in order, ie the files 
will not change as I replicate, so if I do have to use the backup, I 
will not have to first fix any out of order files (indexes)).

James