We're also in this scenario. ADSM MVS (Open Edition) with ATM backbone and
again rarely see over 1.5 - 2Gb/hr on backups, the only exception is in the
case of large flat files such as database dumps where we have seen it go as
high as 4Gb an hour! wow! We have a very small Risc/6000 server
(Uniprocessor w/512Mbyte Ram) on the same ATM backbone which peforms about 6
times better!!!

We know that there are defnitely a lot of issues with TCP/IP performance on
MVS. We backup over 1,000 clients each night to 5 ADSM Servers spread
throughout the sysplex and frequently get lost client tcp/ip sessions during
the course of the night and generally poor performance. TCP/IP on MVS just
plain stinks. I've lost count of the fixtests, ptfs and hipers that have
been applied to both TCP/IP and ADSM in an attempt to get around these
problems. IBM really seem to be chasing their own tail on this one and I
don't expect TCP/IP on MVS to improve for some time.

One thing we did do which helped a lot was reserving the appropriate tcp/ip
sockets on MVS for use exclusively by ADSM. This did provide a lot more
stability. Perhaps you've been smart enough to do this already. The even
smarter thing to do would be to migrate off MVS to AIX / NT.

Regards,

Nathan









        -----Original Message-----
        From:   buser andreas [SMTP:andreas.buser AT Basler DOT ch]
        Sent:   Tuesday, March 02, 1999 4:13 AM
        To:     ADSM-L AT VM.MARIST DOT EDU
        Subject:        Re: MVS ADSM Server

        Hi Virginia,

        we are also locking at ATM for our S/390 Server.

        Do you really get only 1.5 -2 GB per Hour??

        We get 1 to 1.7 GB/Hour already on a 16 MB Tokenring (If everthing
works
        well).
        I would expect ATM to give at least 20 GB/Hour.

        Have I missed something or what kind of OSA do you have?

        ___________________________________________________

        Kind Regards
        Andreas Buser

        Tel: ++41 61 285 73 21  Fax: ++41 61 285 90 27

        Email: Andreas.Buser AT Basler DOT ch

        Address:
        Basler Versicherungsgesellschaft
        Andreas Buser
        Abt. Informatik
        Aeschengraben 21
        4002 Basel
        Switzerland