Comments on: NetBackup and LTO2 drives - use big blocks!

By: Pedro

Pedro — Tue, 18 Jul 2006 23:49:04 +0000

my avg is:
/usr/openv/netbackup/logs/bptm# grep -i KBytes/sec log.* | awk ‘{s =$17;c } END{print “itens: “c” Media: “s/c}’
itens: 1349 Media: 25709.8

By: Nouresh

Nouresh — Thu, 27 Apr 2006 11:38:21 +0000

What major changes I’ll have to do incase the OS is Linux.

The data transfer (throughput) rate is 14mb/sec.
cd /usr/openv/netbackup/logs/bptm
grep -i “KBytes/sec” log.*
transfer rate is 18632.911 Kbytes/sec

Let me explain u abt my setup:
NBU 5.1 MP3
HP StorageWorks MSL 6000
HP Ultrium LTO 3 cartridges

Changes made, but still struggling to get the speed.
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS = 256kb
/usr/openv/netbackup/db/config/NUMBER_DATA_BUFFERS = 16

After creating these files, backup was fired at the speed of 18mb/sec.

Do i have to change any directives in
/etc/sysctl.conf

Cheers,
Nouresh

By: threeta

threeta — Wed, 05 Apr 2006 03:09:39 +0000

Thanks for this - hp lto3 was doing 4MB/sec, now 21, which i suspect, is disk bottleneck.

By: David Comay

David Comay — Wed, 11 Aug 2004 22:48:02 +0000

By the way, in Solaris 10 we've done some major rework in this area. First of all, most of the System V IPC and shared memory tunables have more reasonable defaults. We've also turned these into resource controls that can be set on a per-project basis. For more information, please check here and here.

By: Mark Mayo

Mark Mayo — Tue, 27 Jul 2004 17:47:27 +0000

Cool, glad it could help. Finding the right info within the Veritas site can be a challenge..

By: George Jansen

George Jansen — Tue, 27 Jul 2004 17:29:45 +0000

Thanks. This one is a life-saver.