Veritas-bu

[Veritas-bu] NetBackup poor performance

2004-05-25 10:22:58
Subject: [Veritas-bu] NetBackup poor performance
From: sandrock AT urbana.css.mot DOT com (Mark Sandrock)
Date: Tue, 25 May 2004 09:22:58 -0500
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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