Re: VM server 2.1.0.17 - performance when deleting tape volumes
1998-11-23 08:16:56
Subject: |
Re: VM server 2.1.0.17 - performance when deleting tape volumes |
From: |
Andreas Peikert <apeikert AT AMADEUS DOT NET> |
Date: |
Mon, 23 Nov 1998 14:16:56 +0100 |
First, I'd like to say thanks for the input.
And this is a brief extract from what I understand now:
a) ADSM does not track the usage of DB backup tapes and
EXPORT tapes in the DB - this is just part of the
VOLHIST. ALL other tape usage is also tracked in the
ADSM DB.
b) The VOLHIST records can - and should - regularly be
deleted. One should keep in mind how long the DB
backups and the EXPORT tape info's are needed and
delete the rest up to let's say 3-5 days ago.
The result is:
a) Still usable VOLHIST for Disaster Recovery.
b) Smaller VOLHIST file which also increases the
performance of deleting a tape volume (cause unknown
but I suspect that this VOLHIST is read and sorted in
memory when a volume is deleted).
Side effect: ADSM complains now that the volume can't
be found in the VOLHIST with "ANR9999D ASVOL(nnnn):
Unable to delete scratch volume vvvvvv.".
Best regards
Andreas Peikert, Systems Programmer
aMaDEUS Data Processing GmbH
P.O. Box, D-85424 Erding, Germany
Fon: +49 (0)8122 43-5805
Fax: +49 (0)8122 43-3260
email: apeikert AT amadeus DOT net
P.S. Kind greetings from Bavaria to Austria, too!
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