backup rsync

[Patrick Goetz]

On 8/30/2014 10:10 AM, Simon Matter wrote:
>
> I suggest -aH to preserve single instance storage in the backup.
>

Does cyrus use a lot of hard links?  I use rsync a lot to create 
snapshot backups, and use hard links across snapshots to preserve space; 
however, for a single instance backup and unless the filesystem includes 
hard links (not normal), then the -H won't do much for you.

Of course one should always use -a.

The biggest concern I have about backing up mail spools is keeping the 
index and message stores in sync while the backup is taking place.  A 
long time ago someone suggested using cyrdump, but when I looked into 
this, I couldn't find any documentation whatsoever.  Is cyrdump a real 
thing, or did I imagine all this?