Author: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 4 May 2009 14:09:44 -0400
I am running NW 7.3.3 on Win2K3 and would like to understand how different parallelism settings work during backup. I started a group manually and was monitoring its behaviour. Here is an example: Gr
Author: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Mon, 4 May 2009 14:43:33 -0400
I shouldn't have said "simultaneously". Actually I was expecting to see the result for the target sessions for the devices = 4 on the tape drives. +-- +-- To sign off this list, send email to listser
Author: "Goslin, Paul" <pgoslin AT CINCOM DOT COM>
Date: Mon, 4 May 2009 15:06:54 -0400
If you ask EMC, I think they would recommend you increase the server parallelism to at least 32... How long does it take to complete this group ? How much total data is backed up on a typical group r
Author: Yaron Zabary <yaron AT ARISTO.TAU.AC DOT IL>
Date: Mon, 4 May 2009 23:08:37 +0300
32 is the maximum for Network edition and 64 is the maximum for Power edition. This is a real shame as most contemporary hardware can easily do much more. These values were probably suitable when you
Author: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Tue, 5 May 2009 08:36:43 -0400
Paul, I used Parallelism = Number of Devices * Target Sessions: from the perfromance tuning guide to set the server parallelism setting. I was just trying to understand how parallelism works and used
Author: "Goslin, Paul" <pgoslin AT CINCOM DOT COM>
Date: Tue, 5 May 2009 09:28:35 -0400
Good Question as to which parallelism has the highest priority... I do not know the answer to that. It would be nice if EMC provided a chart or something similar to show the hierarchy for that... It
Author: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Tue, 5 May 2009 09:52:12 -0400
Thanks for the info. +-- +-- To sign off this list, send email to listserv AT listserv.temple DOT edu and type "signoff networker" in the body of the email. Please write to networker-request AT lists
Author: Thierry FAIDHERBE <thierry.faidherbe AT FOREM DOT BE>
Date: Tue, 5 May 2009 16:02:57 +0200
Well, normally logic is as following : 1° datazone parallelism. = max concurrent backup session but is, depending backup server edition computed as 32 (BS) + (32* SN) In other words, you can only hav
Author: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Tue, 5 May 2009 10:03:56 -0400
Paul, Have you also increased the timeout interval for clients to avoid failures ? You've groups running with multiple clients (prob. overlapping) that could exceed the max # specified in the server
Author: "Goslin, Paul" <pgoslin AT CINCOM DOT COM>
Date: Tue, 5 May 2009 10:22:28 -0400
Only when timeout failures begin to be a problem do I ever increase the timeout setting for a group ..... Most of my groups are set to 30 minutes, I have a few set to 120 minutes (they tend to have l
Author: psoni <networker-forum AT BACKUPCENTRAL DOT COM>
Date: Tue, 5 May 2009 11:15:12 -0400
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