[Networker] AW: [Networker] target sessions

Hi,

first thing is your parallelism is set to 16. This means your backup Server
can handle up to 16 streams from your clients. If you set your target
session to 16 to for every drive it mean with 8 drives you can handle up to
16 x 8 streams with your drives. But your server only handles 16. So it
could be tha all your 16 streams would deliver to only one drive. The right
settings for parallelism on your clients, server and target session is
depending on your setup of networker have to be tested. I would beginn with
max. 2 Target Session per drive, 16 parallelism on backup server and a
maximum of 4 parallelism with clients. then i would try to raise the server
parallism up to 32 and check if your server can manage this.

Regards 
Clemens Zerbe
TIM AG

-----Ursprüngliche Nachricht-----
Von: Jody Gregersen [mailto:Jody.Gregersen AT VISHAY DOT COM]
Gesendet: Donnerstag, 15. August 2002 21:08
An: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Betreff: [Networker] target sessions


Hi,

Does anyone have any information on how best to set up target sessions?

We have a Compaq ES40 running networker 6.1.1 saving to a Compaq ESL9326
storage array with 8 drives.  We have one backup that is ~375G and takes a
long time.  The parallelism is set to 16.  Yesterday, I changed the target
sessions on each drive to 16 from 12.  It seems that *all* the backups are
taking much longer now.  In the manual, it says that in most cases writes
are faster when they are all going to one tape so I don't understand the
hold up.

Any input would be appreciated.

Thanks,

Jody

Jody Gregersen
Infrastructure Engineer
Vishay Intertechnologies, Inc.
610-408-3922-Office
610-209-4237-Mobile
Jody.Gregersen AT Vishay DOT com

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