Am 16.11.2011 18:17, schrieb Daniel Bromberg:
> Greetings All,
> 
> I am looking for the best way to do online/offsite, automated, nightly, 
> incremental file backup for my mail server.

these days i would go ahead and move the mailserver on a VMware-vCenter and
with the essentials-plus license you get VMware-DataRecovery which makes
real good deduplication from some terabyte down to 250-500 GB and is
snapshot-based

rsync of a running filesystem-based mailserver will mostly not be consistent
and shut down the services for backups is bad

http://www.vmware.com/products/data-recovery/overview.html

you can restore the whole machine as a running clone and give it
a free ip-address (test recovery)
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on the other hand we are using dbmail and with mysql/innodb as backend
a replication salve is easy to set up which you can always put down
automated and use rsync for a offiste-backup of the slave

we are using both, daily offsite-backup and weekly VDR 3 weeks back
and additionally a weekly rotate on the slave wher a simple
"service mysqld stop; service mysql-lastweek start" will switch
the imap-server a week back to restore mails with imapsync
________________________________

depends on your needs, but this are ours solutions after a long
time thinking how we can get as much backups as possible with
minimzed overhead in work and storage and zero downtime

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