ADSM-L

Re: ADSM Bottleneck

1999-08-24 03:57:37
Subject: Re: ADSM Bottleneck
From: Michael Lightfoot <michael.lightfoot AT CENTRELINK.GOV DOT AU>
Date: Tue, 24 Aug 1999 17:57:37 +1000
Perhaps Mark has failed to understand exactly what SMP (Symmetric
MultiProcessing) implies - ie that if you have a monolithic process using
x% of a CPU on a 2 CPU system, it will show up as using x/2% of each of the
CPUs because it is run (hopefully) equally on each CPU.

So, on a 2 CPU NT box, ADSM will _never_ use more than 50% of the total CPU
available.  When ADSM is flat out expect the total CPU usage to be a little
over 50% (ie ADSM plus whatever other tasks are running.)

michael
SysIX Unix Systems Consulting
Canberra, Australia





"Remeta, Mark" <MRemeta AT SELIGMANDATA DOT COM> on 23/08/99 22:07:58

Please respond to "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>


To:   ADSM-L AT VM.MARIST DOT EDU
cc:    (bcc: Michael Lightfoot/NSO/CSDA)
Subject:  Re: ADSM Bottleneck




I don't know, I have a 2 cpu system and if I look at the percentage
utilized
in performance monitor they are both being used to some extent. This system
is dedicated to ADSM so there are not other applications running on it.
I will have to investigate further when storage pool backups, migrations,
etc are running versus scheduled client backups...

Thanks,
Mark


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