Veritas-bu

RES: [Veritas-bu] NetBackup poor performance

2004-05-25 11:33:02
Subject: RES: [Veritas-bu] NetBackup poor performance
From: carlos_listas AT yahoo.com DOT br (Carlos Alberto Lima dos Santos)
Date: Tue, 25 May 2004 12:33:02 -0300
        See the link below in the Veritas support site.

http://seer.support.veritas.com/docs/183702.htm

T+

Carlos Alberto Lima dos Santos 
Eng. de Computação
Campinas-SP - Brasil
* carlos_listas AT yahoo.com DOT br
 

-----Mensagem original-----
De: veritas-bu-admin AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu] Em nome de Mark Sandrock
Enviada em: terça-feira, 25 de maio de 2004 11:23
Para: veritas-bu AT mailman.eng.auburn DOT edu
Assunto: [Veritas-bu] NetBackup poor performance

I am struggling to grasp the use of NetBackup DC 4.5 on Solaris 8.
The only server is a V480 with a stand-alone SDLT 320 and an L8 tape library
having an LTO-2 drive.

I went through the wizard and configured things for a simple test, but it's
really hard to tell what's going on and when.

I eventually got a manual backup to run, and was surprised to see the i/o to
tape running about 5000KB/sec. Our current backup method, ufsdump, gets
about 15000KB/sec. Pretty big difference.

So a Google search finds a posting from 2001 talking about an undocumented
method of improving NBU i/o performance by creating files called
"NUMBER_DATA_BUFFERS", "SIZE_DATA_BUFFERS", and "NET_BUFFER_SZ".

Are these files the way to go? And if so, why is this information not
explained and configured right up front?

Thanks for any help.
Mark
--
Motorola Personal Communications
Urbana-Champaign Design Center
sandrock AT urbana.css.mot DOT com
Voice: 217-384-8552
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