Hi,
I’ve seen similar problems.
First LTO4 vs. LTO3 will require some tuning, I’m thinking of
data buffer and network buffer size, referring to NBU tuning guide. You should
have a look at adding those entries to you environment.
Allowing the NBU software to use more internal resources in media
server to stream data.
Second, I’ve seen a lot better performance as well not using
multiple stream on exchange backups. Reason for this is NTFS volume and
performance problems reading the volumes.
Of course this depends on how you have configured you information
store disk’s, my case all DB’s where on the same volume 3 times 300 plus GB,
backing up about 1TB Data.
Regards
Kenneth
From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
[mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of WEAVER,
Simon (external)
Sent: 7. april 2009 15:13
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] LTO4 Performance With Exchange 2003 IS Poor
Hi
Environment:
NBU
5.1 MP5 Master Plus many SAN SSO Media Servers Win2k3 SP2
Problem:
Mail Backups of Information Store using LTO4 SL500 are taking 4 1/2 hours extra
to backup compared to LTO3.
Has
anyone got any exposure to Ex2k3 / LTO4 / NBU5.1 Online Exchange Backups?
Checking the Exadmin Guide showed little to no help, and we are backing up
approx 1TB of Exchange Data.
Job
would start at 6:30 and normally finish at 10:30. Now, its finishing at 3:00am.
Same
configuration is in place (ie: 3 streams to 3 different drives) and all part of
the same fabric, apart from being in a different building.
Any
advice appreciated.
Regards
Simon
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