Backup strategy for large mailbox stores
vbfox at ucdavis.edu
Mon Feb 15 12:34:44 EST 2010
John Madden wrote:
> That still leaves full backups as a big issue (they take days to run)
> and NetBackup has a solution for that: You run one full backup and store
> it on disk somewhere and from then on, fulls are called "synthetic
> fulls," where the incrementals are applied periodically in snapshot
> fashion and "voila, you have a full backup." After that one full
> backup, the only thing you ever run is incremental. This takes 2x your
> disk, but it's manageable.
> <cid:part1.04020608.04080904 at ucdavis.edu>
Our NBU admin runs multiple streams by the way which helped a lot.
So the various "letters" of the cyrus hashing are each broken out into
their own full backup. Example out of /var/cyrus/mail/ the subdir
A-K are in one stream, L-Q in another, etc. I'm not an NBU admin
so I dunno why this is more efficient but it worked great.
More information about the Info-cyrus