|
Re: [Networker] Performance Tuning backup
2007-07-26 11:21:10
E Gold wrote:
Hard to tell without a bit more information. How many of your tape
drives are in use during the backup?
2 are in use.
How many sessions are being
written?
8 sessions are being written.
What is the observed write speed on each drive?
10 mb/sec, sometimes upto 15, but usually 10.
What is the parallelism setting for the client?
it is set to 8 for parallelism.
So, each client session does 2.5Mb/s. In theory, increasing client
parallelism is the answer, but:
. It may be impossible for the client to run that many sessions,
because of the way the agent works.
. Running too many sessions might degrade performance because the
sessions will compete on some resource (memory, I/O bandwidth) and
starve each other.
The conclusion is that you don't seem to have any bottleneck with the
Networker server.
I suggest that you will change client parallelism. I would check with
10 sessions and 6 sessions and see how it changes performance.
--
-- Yaron.
To sign off this list, send email to listserv AT listserv.temple DOT edu and type
"signoff networker" in the body of the email. Please write to networker-request
AT listserv.temple DOT edu if you have any problems with this list. You can access the
archives at http://listserv.temple.edu/archives/networker.html or
via RSS at http://listserv.temple.edu/cgi-bin/wa?RSS&L=NETWORKER
|
|
|
