Dan,
        I just finished an ADSM migration from MVS to AIX.  I've run both the
2.1.0.x and 2.1.5.x levels of code on our AIX server (RS/6000 model R30
with 2 processors) and both have performed significantly better than
ADSM on our MVS system (3090-500J).  I will be going back to the 2.1.5.x
code once the next server maintenance level is rolled out by IBM (had
some problems with the 2.1.5.8/9 code).   My recommendation would be to
go the SMP route or, at the very least, get a server that could be
upgraded to multiple processors if necessary.   While I haven't done any
formal benchmarking, here are some observations.  By the way, our
environment is similar in size to yours...

1) Daily backups - on MVS, we were lucky to finish before 7:30 AM.  On
AIX, with the same schedules, most of the backups are done by 3:30 AM.
The ADSM AIX server seems to handle large workloads much better than our
ADSM MVS system.

2) Weekly expire inventory processing...  On our MVS system, it took
24-30 hours.  On AIX, it's been running 7-8 hours.


Tim Pittson
tpittson AT himail.hcc DOT com

>----------
>From:  Digest Info  Refcard[SMTP:Dan.Crouse AT MAILPORT.DELTA-AIR DOT COM]
>Sent:  Monday, October 07, 1996 8:03 AM
>To:    Multiple recipients of list ADSM-L
>Subject:       SMTP vs. UNI ADSM processor
>
>On October 1, Mike Kaczmarski  wrote:
>
>> The ADSM AIX server 2.1.5.X code utilizes the POSIX threads
>> implemented in AIX 4.1.4+ to support light-weight threading which
>> helps performance somewhat on SMP machines.
>>
>> The ADSM AIX server 2.1.0.X server uses a kernel extension and
>> heavy-weight processes and can run on AIX 3.5+.  If you choose to run
>> the 2.1.0.X server on an SMP machine, we reccommed that you bind the
>> executable to a single CPU for better performance.  There is a sample
>> script named bind.dsmserv that is provided to do this for you.
>>
>> Mike Kaczmarski
>
>My colleagues and I are  in the process of configuring an AIX ADSM server to
>replace our MVS server.  We  would like to solicit opinions on whether we
>would be better off to get an SMTP server or  a large UNI-processor.
> Throughput is very important.   All clients will be using TCP/IP as their
>communications protocol.  Most of these clients will be connected to the
>server via FDDI.  Our current MVS server has 110+ clients (this grows daily)
>and is currently managing between 1 TB and 2 TB of data.  The database is
>allocated at approximately 8 GB.   We expect this environment to at least
>double within the next year.  Thank you in advance for your suggestions.
>
>DanC
>=============================================
>Daniel G. Crouse
>Software Information Services, Inc.
>Email:  Dan.Crouse AT MAILPORT.DELTA-AIR DOT COM
>Vmail:  800-233-6838
>Voice:  404-714-5754
>=============================================
>