Backup strategy for large mailbox stores

John Madden jmadden at
Mon Feb 15 14:16:54 EST 2010

> 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.

Yeah, we do a stream per disk.  Since the disk is pegged reads, no point 
in doing more than one stream per filesystem that I can see.


John Madden
Sr UNIX Systems Engineer
Ivy Tech Community College of Indiana
jmadden at

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