ADSM-L

Recovery Log volumes . . . how many?

2007-01-19 11:52:44
Subject: Recovery Log volumes . . . how many?
From: Richard Rhodes <rrhodes AT FIRSTENERGYCORP DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Wed, 17 Jan 2007 11:03:05 -0500
I was just reading a document from IBM's web site about TSM administration
tips.
One of the tips is to have 4-6 recovery log volumes for a large tsm server.

What is the reasoning for this?

I guess I've always pictured log processing as mostly a sequential write
process,
but then that might be Oracle knowledge getting in the way.

Will having 4-6 log volumes help speed up log roll back on TSM startup
after a crash with a fairly full log?  One time we almost ran out of log
 space due to something pinning the log, but we couldn't figure out what
was
pinning it.  The log had grown to 10gb by the time we finally decided to
cycle TSM.  On the way back up it took over an hour to roll back the
log entries.


Thanks!

Rick


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