Hi Joe,

Our environment is same as yours - Os/390 TSM4.1.3.0.
We run roll-forward mode on the recovery log.
Size currently allocated for the recovery log = 5364Meg
The maximum you can make this is in the region of 5.4 Gig -
check back in the archives - it has been discussed before.
It depends on how busy your TSM system gets - how many tansactions
you are doing.
Our current Bufpoolsize:
Bufpoolsize 384000 - This will depend on your system's memory
(You can always double your current bufpoolsize and see what
this does to your cache hit percentage - if it stays below
98% - increase more - if above leave as is).
Mpthreading - Have been running with it set to yes for about
a year already, no problems - we have in the last month
switched it off - (trying to determine the cause of something
else - IBM recommended switching off the MPthreading just
"in case").

Hope this helps.
Regards
Christo Heuer
ABSA Bank
Johannesburg
South Africa
====================================================================


> Environment:
> Server: 4.1.3.0
> Platform: S390
>
> 1.  Logmode: We're going to change the Logmode from Normal to Roll
Forward.  What determines the amount of disk I'll require?
>
> 2.  Bufpoolsize: We're going to increase from 24576K to ?.  What's the
determining factor?
>
> 3.  Mpthreading:  We're going to turn it on.  Are there any considerations
I should concern myself with?
>
> None of this info is in the manual that I'm aware of.  I get a log of "try
this" form Tivoli support.  Unfortunately, I don't work in an environment
where I can "try this" without first knowing what
> the repercussions are.
>
>
> Regards,
> Joe Wholey
> TGA Distributed Data Services
> Merrill Lynch
> Phone: 212-647-3018
> Page:  888-637-7450
> E-mail: joseph_wholey AT ml DOT com
>
>

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