Also set txnbytelimit to themaximum of 2GB (if you have a relatively new client
5.3 or later) and txngroupmax on the server 1024 (though that is not really
your issue on this client but might be on clients with many smaller files)
Upping txnbytelimit beyond the 25600 default may make a huge difference as you
cut down on your transaction mini-commits dramatically...
Kelly Lipp
CTO, VP Manufacturing
STORServer, Inc.
485-B Elkton Drive
Colorado Springs, CO 80907
www.storserver.com <http://www.storserver.com/>
719-266-8777
________________________________
From: ADSM: Dist Stor Manager on behalf of David Vargas
Sent: Thu 1/31/2008 8:12 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Win2K3 backup performance
This is what I found to work with our system, with a 1Gb backup network.
* TCPWINDOWSIZE 2048 - Maximum setting
TCPWindowsize 512
* TCPBUFFSIZE 512 - Maximum setting
TCPBuffSize 255
The maximum settings
David
-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of
Sam Sheppard
Sent: Thursday, January 31, 2008 2:09 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: [ADSM-L] Win2K3 backup performance
We have a Windows 2003 client running TSM 5.4.1 backing up to a Solaris
10 TSM server running the 5.4.1 server.
The client has several very large files to be backed up (300-400GB). We
are finding on a 1.3GB test file that we can only get a throughput of
about 10MB/sec (looks like 100Mb speed) even though this client is
configured on a GigE VLan. One interesting aspect just discovered is
that a restore of the same file got speeds of 37MB/sec, which is about
the same as an FTP of the same file from the client to the server.
Client, switch, and server all set to 1GB full.
At this point, I'm completely mystified as to what might be behind these
performance anomalies. I would expect much higher throughput rates on
all of these tests, but would be satisfied if the backup would just
perform at the same speed as the others.
Client options: Server Options:
TCPWindowsize 63 TCPWindowsize 131072
TCPBuffsize 32
Thanks
Sam Sheppard
San Diego Data Processing Corp.
(858)-581-9668
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