Dave,
        I agree that the database size is a condition of the number of files
stored but this rule of thumb I mentioned is in the ADSM Administrator's
Guide (version 2).  Perhaps the manual should be updated accordingly...

Regards...
Tim Pittson


>----------
>From:  Dave Cannon[SMTP:dcannon AT VNET.IBM DOT COM]
>Sent:  Wednesday, November 27, 1996 3:12 PM
>To:    Multiple recipients of list ADSM-L
>Subject:       Re: ADSM database handling basics
>
>>rule of thumb for sizing the database is that it should be between 1%
>>and 5% of the total amount of space required for data storage.  We've
>>got about 10,000,000 files that ADSM is tracking with about 800 GB in
>>the storage pools (plus copy storage pools for everything) and our
>>database is about 8 GB.
>
>The size of an ADSM database does not depend on the amount of
>storage pool space required, but rather on the number of files
>stored.  The rule of thumb mentioned above is therefore very crude, at
>best.  If you have an idea concerning the number of files to be stored,
>following is a much better predictor of database size.
>
>Every version of a file requires approximately 500-600 bytes of database
>space.  Each additional copy of the file (i.e., cached copy or copy
>in a copy storage pool), requires an additional 150-200 bytes of database
>Additional database space will be required to allow for partially filled
>pages and other overhead.
>
>Dave Cannon
>ADSM Development
>