Here's some of the performance-related options from one of our
dsm.opt's, just for comparison's sake.

TCPBUFFSIZE   127
TCPWINDOWSIZE 64
TXNBYTELIMIT  25600
ResourceUtilization          4


>>> bwhitten AT UABMC DOT EDU 2/2/2006 12:38:41 PM >>>
Hi all,

Netware group at our location is not happy with backup
and restore performance using TSM. We are seeing roughly
4 to 5 GB per hour at best. We have tested going to SSA disk
pools, SATA disk pools and directly to 3590/3592 tape FC. We
don't see very much difference in these methods. Typical Netware
client is 150,00+ files with 25 to 40 GB per client. We also have
Groupwise and the performance for those is roughly 20 percent
worse.

Clients are mostly 5.1 and 5.2.

TSM servers are P615/4GB ram and P520/4GB ram running AIX 5.2
and TSM server 5.2.3

Most clients are GB Eth and we see similar performance on Windows
servers with similar volume sizes/number of files. It seems to me that
this is mostly a function of a large number of small files. We also
have
AIX, Solaris and Oracle clients and performance is generally better
on those clients (especially Oracle Rman/TDP).

I have looked through the postings and have not been able to glean
much of a consensus about what throughput should be for this type
of configuration. We have tried many of the parameter changes that
have been suggested ( buffer/tcp window sizes, quiet option, etc.)
without much success. If anyone has overcome these types of problems
or can give me some definitive answers ( even if the answer is 'that's
the
best you'll get' ), please e-mail me offline.

Thanks for reading and thanks to all who post on this site.


Brec Whitten

UAB Hospital


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