Re: [Veritas-bu] storage nodes

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?

Bobby.

-------------- 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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