ADSM-L

Reply to MOVE DATA from disk

1994-11-28 09:55:00
Subject: Reply to MOVE DATA from disk
From: Mike Stewart <STEWAJM AT AUDUCADM.DUC.AUBURN DOT EDU>
Date: Mon, 28 Nov 1994 08:55:00 -06
*** Original Author:  ADSM-L @ UGA - ** Remote User **; 11/24/94 04:47

>From:         Reinhard Mersch <mersch AT UNI-MUENSTER DOT DE>
>Subject:      MOVE DATA from disk to tape
>X-To:         adsm-l AT vm.marist DOT edu
>To:           Multiple recipients of list ADSM-L
> <ADSM-L%MARIST.BITNET AT uga.cc.uga DOT edu>
>
I just started a MOVE DATA from a disk volume to a tape storage pool
with collocation on. My server is ADSM/6000 1.2.0.5. I watched the process
to request the first tape volume, write some files to it, request the
second tape volume, write one file to it, request the third tape volume,
write one file to it, then request the second tape volume again.

At that point I decided to cancel the process.

Obviously, MOVE DATA does not group files according to their destination,
as migration does. A more intelligent behaviour is needed here.

Reinhard Mersch                     Westfaelische Wilhelms-Universitaet
Universitaetsrechenzentrum, Einsteinstrasse 60, 48149 Muenster, Germany
E-Mail: mersch AT uni-muenster DOT de                   Phone: +49(251)83-2488

*** Comments from STEWAJM - Stewart, Mike; 11/28/94 08:49am:

I observed the same behavior with the MVS server (1.1.8).  After
about an hour it had gone through about a hundred tape
mounts, remounting the same 5 or 6 tapes over and over and over.


I gave up (after some encouragement from our operators),
cancelled the process and turned collocation off.
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