Verify your drive configuration; with HP I'm fairly certain you can
configure each drive independently. You want to make sure that all of
the drives are configured the same, such as the block mode, etc.
David A. Chapa * Technical Advisor, Technical Marketing * ADIC *
720.249.5836 * david.chapa AT adic DOT com
Pathlight VX - Integrated Disk-to-Tape Backup - http://www.adic.com
-----Original Message-----
From: nitin.jog AT abnamro DOT com [mailto:nitin.jog AT abnamro DOT com]
Sent: Tuesday, November 04, 2003 4:27 PM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Peculiar slowdown in Veritas netbackup.
Hi,
I am using netbackup v34_5 on HPUX 11i. The master is connected to an
STK
DLT tape library with 4 drives and robotic arm.
I have 2 backups, one is a 73GB backup for oracle database(at filesystem
level). The other is approx 40GB backup
(again filesystem based).
The backend is EMC storage.
I have setup the netbackup tuning parameters NUMBER_DATA_BUFFERS = 16
SIZE_DATA_BUFFERS=65536.
This is the problem:
I am getting inconsistent timings on the backups when run
simultaenously.
(individual times are fine). These are only 2 backups that run on this
server.
On a good day, I can finish both the backups running simultaenously in
around 3hours.
(2.5 hours for 73GB) and (1.5 hours for 40GB)
but quite a few times the 2nd backup takes 4hours..its just
sluggish..there
is not much I/O going through. Even if the first backup finishes (in 2.5
hours) the second backup continues to stay sluggish. We dont see any
disk
contention, the netbackup is also tuned to the best of knowledge, there
is
no high cpu usage, there is ample memory 4GB, so what else could cause
this behaviour ?
really appreciate any clues..have a case open with veritas also.
Thank you
Nitin
------------------------------------------------------------------------
---
This message (including any attachments) is confidential and may be
privileged. If you have received it by mistake please notify the sender
by
return e-mail and delete this message from your system. Any unauthorised
use or dissemination of this message in whole or in part is strictly
prohibited. Please note that e-mails are susceptible to change.
ABN AMRO Bank N.V. (including its group companies) shall not be liable
for
the improper or incomplete transmission of the information contained in
this communication nor for any delay in its receipt or damage to your
system. ABN AMRO Bank N.V. (or its group companies) does not guarantee
that
the integrity of this communication has been maintained nor that this
communication is free of viruses, interceptions or interference.
------------------------------------------------------------------------
---
_______________________________________________
Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu
|
