Veritas-bu

Re: [Veritas-bu] Performance issues with user initiated backups.

2007-07-04 11:47:20
Subject: Re: [Veritas-bu] Performance issues with user initiated backups.
From: <mark.a.goodchild AT bt DOT com>
To: <Len.Boyle AT sas DOT com>, <veritas-bu AT mailman.eng.auburn DOT edu>
Date: Wed, 4 Jul 2007 16:31:54 +0100
Thanks Len
 
No restores were running, backups only.
 
Mark


From: Len Boyle [mailto:Len.Boyle AT sas DOT com]
Sent: 04 July 2007 16:30
To: Goodchild,MA,Mark,XJJ33C C; veritas-bu AT mailman.eng.auburn DOT edu
Subject: RE: [Veritas-bu] Performance issues with user initiated backups.

Hello Mark

 

When  the restores were running on the master/media/client systems, did they both have the same level of usage outside of the restores.  That is was the cpu busy, i/o usage pattern, network usage etc at the same levels for both restores.

If the user backup was running when the systems was under heavier usage and the master scheduled backup was running when the systems was lightly used, this might explain your differences.

 

I am not sure how much different the process flow for a user backup vs a backup scheduled from the master. But it might be the relative system priority of the inet.d started processes vs the process's started by the user backup.

 

len

 

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of mark.a.goodchild AT bt DOT com
Sent: Wednesday, July 04, 2007 10:03 AM
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] Performance issues with user initiated backups.

 

Hi all

Environment :
Master Netbackup 6.0 MP4
Solaris 10
Media server 6.0 MP4
HP-UX 11
IBM 3584 Library San Attached
IBM LTO2 Drives

Media server is the oracle client too so it’s a local backup.

Data :

/u21/oradata/D1         118gb   169 files

User Backup of above writes to drive1, tape1 at 13mb/sec

Scheduled/immediate backup writes to drive1, tape1 at 27mb/sec

We believe that there is so much communication going on between all the netbackup processes regarding files and updates when a user backup is run.

Can anyone think of anything else that would slow this backup down to half the speed.

We have done numerous tests on different drives, tapes and even chosen different data locations, and come up with the same results.

Cheers

_______________________________________________
Veritas-bu maillist  -  Veritas-bu AT mailman.eng.auburn DOT edu
http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu