The maximum number of total threads is a limit in ADSM.  "show threads" will
return this number.  When is approaching 500, you will have application
issues.  When a server is busy, a thread seems to be used by each of the
following: each database and log volume, a storage pool volume being written
to, each client session running, server processes.  If anyone has a more
precise mathematical model please share.

ADSM multi-threads.  With the right database configuration and network
configuration, 100 clients can be backed up at one time.
Jeff Bach
Home Office Open Systems Engineering
Wal-Mart Stores, Inc.

WAL-MART CONFIDENTIAL


        -----Original Message-----
        From:   Richard Sims [SMTP:rbs AT BU DOT EDU]
        Sent:   Wednesday, August 01, 2001 6:43 AM
        To:     ADSM-L AT VM.MARIST DOT EDU
        Subject:        Re: Max # sessions

        >Is there a preferred max number of simultaneous backup session?  I
now
        >backup about 20 server at a time during one session but I notice
that some
        >have "recv wait" status if I do a "q sess".  I thought TSM was
multi
        >threaded and would backup all of them at once.  I have a gig card
in the tsm
        >server so network bandwith isn't an issue.

        Richard - The maximum feasible number of sessions depends upon the
resources
                  available at your site to support simultaneous backups, so
there
        is no single answer.  RecvW is not an indication that simultaneous
backups
        are not happening: that only means that the server is ready and
waiting to
        receive an expected message from the client.

        You have a gig card, but check the session network data transfer
rates to
        assure that the expected rate is actually being achieved.  All kinds
of
        things, from router misconfiguration to denial of service attacks
can
        reduce network performance.  Expect the unexpected.

           Richard Sims, BU


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