If you set the jobs to 1, each defined DSSU will only use 1
tape drive to destage. Each DSSU has its own device to use for the
destage, so you can use 1 in max jobs, set each DSSU to use a single tape device
of your choosing, and all will work the way that you want.
It would use 1 tape drive per DSSU with 1 job per destage
schedule.
Bobby Williams
2205 Peterson
Drive Chattanooga, Tennessee 37421 423-296-8200
I am not sure if this
will work because I have three disk-devices and three tape-drives. What I want
is that each disk-device uses its own (one) tape drive.
-----Original
Message----- From:
bobbyrjw AT comcast DOT net [mailto:bobbyrjw AT comcast DOT net] Sent: Wednesday, June 13,
2007 5:59
PM To: DULLAART Rob ONL;
veritas-bu AT mailman.eng.auburn DOT edu Subject: Re: [Veritas-bu] storage
nodes
If you are using DSSU's as the disk-cache,
have you used /usr/openv/netbackup/MAX_STAGING_JOBS files to limit the number of
staging jobs to tape?
-------------- Original message
-------------- From: DULLAART Rob ONL
<rob.dullaart AT orange-ftgroup DOT com>
Hi list,
Got an interesting question (I
think) J
We run on Netbackup version 5.1
mp5, most of our servers run Sun Solaris. Our master server has a disk-cache
device attached. This is 10TB of disks divided in three separate LUN’s and
filesystems. We have three LTO3-tapedrives, to which we “flush” the disks to.
The LTO3 drives are configured as HCART3 in NBU. We made three storage-nodes
in NBU which are configured to use one LTO3 tape-drive.
But, and this is where my problem
is, when NBU start to duplicate it still takes more then one LTO3-drive per
disk-device. The problem is as soon as NBU start to read with more then one
tape-drive the performance drops significant.
I need to find a way to
prevent this. What I want is that one disk-device uses only one
tape-drive.
Any
ideas?
Regards,
Rob Dullaart
Senior Netbackup
Specialist
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