ADSM-L

Re: Max # sessions

2001-08-01 07:42:02
Subject: Re: Max # sessions
From: Richard Sims <rbs AT BU DOT EDU>
Date: Wed, 1 Aug 2001 07:42:47 -0400
>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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