[Veritas-bu] client with gigabit interface but with low performance

Subject:	[Veritas-bu] client with gigabit interface but with low performance
From:	eyamada AT diveo.net DOT br (Edson Noboru Yamada)
Date:	Thu, 30 Jun 2005 08:19:15 -0300

 
Hi
 
In order to perform some tests, I've setup a machine with 2 Xeon cpus, 2GB RAM 
and a gigabit 
interface running Redhat Linux AS to act as a netbackup client (i'm using the 
4.5 version, btw).
As a media manager, I have a Sun V480 with 4 cpus, 4 GB and, of course, a giga 
interface as well.

Using a tool like iperf, I'm able to generate a traffic like 800 or 900 Mbps 
between the two machines,
as expected. However, to my surprise, when I ask the media manager to start a 
file system full
backup, the throughput does not increase more than 12 MBps (around 100 Mbps). 
Both machines
were idle during the test.
 
Is this a normal situation? Any suggestion to improve the performance?
 
Thanks
 
Edson

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