Hi Wayne - and others following this thread with interest....

Firstly, how big is your current environment on OS/390 as far as
TSM is concerned. I really do not see OS/390 scaling like AIX
when it comes to TSM...
I agree that most of the people running OS/390 have all the
scheduling/reporting/tape handling sorted out and it works
very well.
OK - here comes my personal views (Based on 7+ years of
running ADSM/TSM on Sun/Aix/NT/2000 and OS/390:
General Performance: If you give OS/390 unlimited resources - so, in
other words - no memory/cpu contention - it would perform
OK. AIX on the other hand will scream if it was running on a
S80 for instance.
I/O performance: Escon on OS/390 limited to +- 15 Mb/sec - normally
you share that with the rest of the LPAR - batch and whatever else
you are running. On AIX you have FCP - a lot cheaper and faster
than escon implementations on OS/390. Like mentioned already by
other members - OS/390 you are limited in terms of robotics you
can implement - basically a STK silo or IBM 3494. On AIX you
have a very wide range of supported configs.
Reporting: You can do all your reporting still from OS/390,
even if you are running a TSM server on NT/AIX/Sun. We have
all our reporting/problem logging for our TSM environment
running from OS/390 - although the TSM servers are a mix
of OS/390 and many NT TSM servers.
Tape mgmt. your RMM, TLMS etc. are in anycase told that it
must not manage TSM data - TSM has that built in. On AIX
you just let TSM handle it. At the end of the day the only
real benefit I can see on OS/390 and tape handling is if
you have electronic vaulting set up - so your robotics and
tape drives for your off-site storage pools are located
physically off-site but genn'ed as local drives.

With scripts and maybe DRM in place it should be just as
easy to manage your tapes on AIX as on OS/390.

Hope this helps a bit.

Regards
Christo



TSM on S/390 works great here. We have good automation tools for message
handling and staff to note messages that haven't been automated. We schedule
lots of batch admin clients with the S/390 job scheduler that generate
reports that are distributed thru  the report distribution software. No
performance problems here, except we do have to compete for tape drives...

Thank you.

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