Agreed, there is another STAGING touch file (cant remember of the top of
my head ) which determines what size you want each job to be.
Dave
________________________________
From: veritas-bu-bounces at mailman.eng.auburn.edu
[mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of Henry
Kemp
Sent: 17 November 2006 17:49
To: veritas-bu at mailman.eng.auburn.edu
Subject: Re: [Veritas-bu] Max drives used for backup
Joe - we had this problem for a while and after some investigation we
tweaked MAX_STAGING_JOBS to "1" so a DSSU would only relocate to one
drive at any time.
More info in this TechNote
http://seer.support.veritas.com/docs/280398.htm.
Rgds,
Henry
On 17 Nov 2006, at 16:03, Joe Royer wrote:
On a similar note, I created a 1-drive STU for destaging because
the
DSSU has an annoying (and stupid) habit of allocating all
available
drives when it tries to destage. Of course this makes all the
streams
(3 in this case) go slowly because they're all reading from the
same
DSSU spindles. The 1-drive STU doesn't work. I can't help
noticing
that the option says "Maximum concurrent drives used for backup"
(not
duplication). This must be a bug since it defeats the whole
purpose
of the DSSU, which is to keep the tape drive spinning. 5.1 MP5
Linux
(haven't tried it on MP4 yet).
----Original message----
Date: Thu, 16 Nov 2006 06:13:22 -0500
From: "Bobby Williams" <bobbyrjw at bellsouth.net>
Subject: Re: [Veritas-bu] Duplications running very slow
There was a known problem in 5.1 with duplication within the
same storage
unit.
Just to see if this is hurting you (I have done this at my 18
different NB
sites), create a new storage unit in your library called
"duplication".
Make it 1 drive, on demand only. (you don't have to lessen the
number of
concurrent drives in you other storage unit).
Try a duplication (manual or vault) and pick "duplication" as
the
destination storage unit.
See if things speed up.
Bobby Williams
2205 Peterson Drive
Chattanooga, Tennessee 37421
423-296-8200
--
Joe Royer / SysAdmin / Digital Motorworks / 512-692-1028
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