I have always found that iperf far exceeds the performance with NetBackup, even when as you suggest trying to use similar buffer sizes.

 

I think you may be better off testing with NetBackup.   You can use the GEN_DATA directives to create data without involving disk read speeds:

http://www.symantec.com/docs/TECH75213

you can then create a disk storage unit on the Media Server for your test policy and use the SKIP_DISK_WRITES touch file:

 

http://www.symantec.com/docs/TECH69948

 

(Beware as that will disable it for all disk backups!)

 

I have not myself tried this yet….but in theory it will just test the data transfer between the client and media server.

 

William D L Brown

 

From: veritas-bu-bounces AT mailman.eng.auburn DOT edu [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Michael Graff Andersen
Sent: 02 April 2011 09:17
To: veritas-bu AT mailman.eng.auburn DOT edu
Subject: [Veritas-bu] iperf settings for best simulating netbackup ?

 

Hello

 

Wonder what iperf settings best simulates netbackup, in regards to window size & parallel streams

 

Thinking that the windows should be the same as NET_BUFFER_SZ & parallel same as active jobs

 

Regards

Michael

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