I attended the TSM Advanced class for V4.1 and there was a recommendation
that you limit the DB Volumes to a "maximum of 12 to reduce the space used
for logical volume manager overhead".   I've also seen as many as 32 DB
volumes, but we took it back to 16 DB Volumes and will eventually go back to
8 DB volumes.

Sam Schrage
System Engineer
InfoSystems, Inc
615-417-1887
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----- Original Message -----
From: "Fred Yang" <FYang AT NSHS DOT EDU>
To: <ADSM-L AT VM.MARIST DOT EDU>
Sent: Thursday, April 10, 2003 2:48 PM
Subject: Limitation of TSM DB Volumes


> Hi, All,
>
> Recently we expand our disks used for TSM DB because of the DB growing,
and
> I'm going to increase DB volume number to 20 from 7 currently. I knew
> creating multiple DB volume will help performance because of LvmDiskServer
> thread will run on each DB volume. But I also heard that the number DB
> Volume is restricted to 12, can anybody confirm me are there really some
> limit about number of DB volumes I could use (And if yes, what's the
limit)
> ?
>
> I'm running TSM 5.1.6.2 / AIX 5.1 .
>
> Thanks,
> Fred