[Veritas-bu] NDMP backup: Qtree vs Volume
2007-02-13 18:16:51
Subject: |
[Veritas-bu] NDMP backup: Qtree vs Volume |
From: |
neil at mbari.org (Conner, Neil) |
Date: |
Tue, 13 Feb 2007 15:16:51 -0800 |
It's a balancing act. A stream of 1.5 TB creates a single backup image that's
written over possibly many tapes depending on the capacity. If you have a
media error, the entire backup job has to be restarted (unless things are
different in 6.0). A restore job could conceivably require all of the tapes to
be loaded to satisfy a request for a single file.
I have a much larger file system and relatively low capacity tapes so I opted
to create separate streams for chunks of qtrees that fit on no more than 2 or 3
tapes. This means that I have to monitor creation of new qtrees and growth
(easy to script) and then periodically move larger qtrees into a new stream.
HTH,
Neil
________________________________
From: veritas-bu-bounces at mailman.eng.auburn.edu [mailto:veritas-bu-bounces
at mailman.eng.auburn.edu] On Behalf Of Rajmund Siwik
Sent: Tuesday, February 13, 2007 9:11 AM
To: veritas-bu at mailman.eng.auburn.edu
Subject: [Veritas-bu] NDMP backup: Qtree vs Volume
Hi All,
I am setting up my Netbackup 6.0 server which will be doing ndmp backups on
NetApp filers.
Currently the volumes tend to be roughly 1.5TB each with many qtrees .
We're trying to decide whether to backup the data at the qtree level or the
volume level.
Do you have a preference one way or another and why?
--Rajmund
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