Re: HSM Migration Processes
2001-04-17 10:51:29
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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