Hi Don

you many migration processes are allowed at the same time in your STG ?

rv

> -----Message d'origine-----
> De : Don Avart [mailto:donavart AT YAHOO DOT COM]
> Envoyé : mardi 17 avril 2001 16:34
> À : ADSM-L AT VM.MARIST DOT EDU
> Objet : HSM Migration Processes
> 
> 
> Our TSM server (RS6000 S7A) is attached to an STK silo
> with 22 tape drives.  The problem that we are
> experiencing, beyond library and drive reliability, is
> with the apparent migration and recall process.
> Because we have many tape drives, we have dedicated 8
> drives to HSM only.  We have two HSM enabled
> filesystems, /hsmprod and /hsmuser which are local to
> the TSM server.  The filesystem of most concern is
> /hsmprod (production).  This filesystem is 200GB and
> has 90GB written to it nightly.
> 
> The problem we are encountering is if we miss a backup
> or two the filesystem is full.  The backup process is
> relatively fast, we write to disk and to multiple tape
> drives.  However, the migration process is extremely
> slow.  It appears that this process will only mount
> one tape drive for migration.  Yet when users try to
> recall data, it will mount multiple tapes and spawn up
> to 20 recall processes (as per maxrecalldaemons=20).
> Are there any settings to increase the number of
> sessions or daemons the migration process will spawn.
> 
> Thanks in Advance
> 
> Don Avart
> 
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