Networker

Re: [Networker] Fw: [Networker] Parallelism of "backup clone" pool devices?

2008-05-29 10:23:42
Subject: Re: [Networker] Fw: [Networker] Parallelism of "backup clone" pool devices?
From: Teresa Biehler <tpbsys AT RIT DOT EDU>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Thu, 29 May 2008 10:21:15 -0400
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?

-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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