Hi Brian,

      We Restored a 130 GB database in 2 hours due to multiple restore
sessions on a Gigabyte backbone.  Now, the DBA had to kick off 6 separate
streams and since a great deal was on tape some of the streams waited for
each other, but I'd rather have it waiting then not doing anything if it
had been single streamed.  I have also noticed (since we are no-collocated
also) that with multistreaming the no-collocation can really help if you
have enough tape drives and memory on the client (I crashed 1 client due to
too many restore streams).  In fact the restore took 1/2 time the backup
did due to the multistreaming.  The client was 4.2.1.11 and the Server is
5.1.1.0.  Can't wait to try a 5.1 client.

Thank You,
Bill Rosette
Data Center/IS/Papa Johns International
WWJD



                      "Hart, Charles"
                      <charles.hart@MED        To:       ADSM-L AT VM.MARIST 
DOT EDU
                      TRONIC.COM>              cc:
                      Sent by: "ADSM:          Subject:  Re: Multiple restore 
sessions
                      Dist Stor
                      Manager"
                      <[email protected]
                      .EDU>


                      02/19/2003 04:35
                      PM
                      Please respond to
                      "ADSM: Dist Stor
                      Manager"






With TSM 4.1.5 and restoring Archive objects we have had good success, the
only thing is tape contention was a bit of a factor as we were just
restoring archived dbf file from the same file system.  Little different
than the TSM 5.1 multi-stream backup / restore.

-----Original Message-----
From: brian welsh [mailto:brianwelsh3 AT HOTMAIL DOT COM]
Sent: Wednesday, February 19, 2003 3:22 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Multiple restore sessions


Hello,

AIX 5.1, TSM 4.2.2.8 (soon upgrading to 5.1)

I'm wondering if someone have good experiences with multiple restore
sessions. We have 4 drives in our library. When there are no other
processes
and a client is starting a restore and files are spread over several tapes,
will there be up to 4 simultanious sessions for restoring?

Is it necessary to set collocation off, before you can use multiple restore
sessions, or with collocation enabled and data for one client spread over
more tapes it is also possible to get multiple restore-sessions?

Thanx,

Brian.





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