EMC NetWorker discussion <NETWORKER AT LISTSERV.TEMPLE DOT EDU> wrote on 
05/29/2008 10:21:15 AM:

> The "max parallelism" set to 4 seems fishy to me.  If you want 5 jobs to
> run, doesn't this need to be increased to at least 5?

Don't think so .. my other 4 drive library is set to 4, and it definitely 
runs 5 or more jobs at the same time. 

I believe the parallelism refers to the total number of drives that can be 
in use at one time, not the total number of jobs that be run acorss the 
sum of all the drives.

> 
> -Teresa
> 
> -----Original Message-----
> From: EMC NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] 
> On
> Behalf Of MIchael Leone
> Sent: Wednesday, May 28, 2008 11:54 PM
> To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
> Subject: [Networker] Fw: [Networker] Parallelism of "backup clone" pool
> devices?
> 
> Does anyone have any ideas about this?
> 
> >I know I'm missing something simple here ... I have a number of jobs
> >that
> >are clone jobs. So I have a tape library with 4 drives, all of which
> >are
> >defined as devices for a media pool that is a "backup clone" pool.
> >
> >I've noticed that it seems that each backup clone job will wait until
> >
> >there is a free tape drive, before writing. For example: I have JOB
> >1, 2,
> >3, 4, 5 - all are clone jobs, defined to use AFTD disk devices.
> >Assuming
> >that all finish writing to the AFTD devices at approximately the same
> >
> >time, JOB 1,2,3,4 will each use one of the 4 tape drives to write to,
> >and
> >JOB 5 will wait until a running job finishes, before writing to the
> >tape.
> >This is *not* the case with my other library, which has 4 drives, all
> >
> >defined as part of a media pool that is *not* a backup pool.
> >Consequently,
> >all 5 of those jobs will write to the 4 tape drives at once - i.e.,
> >one of
> >those jobs will be servicing 2 groups at once.
> >
> >What setting am I missing, in order for my backup clone tape drives
> >to
> >service multiple sessions/jobs at once? I have "Max Parallelism" set
> >on
> >the library to 4. Where else would I look? Or can a device that is in
> >a
> >"backup clone" media pool not be used by multiple sessions/groups at
> >one
> >time?
> >
> >Thanks
> 
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