SV: SV: SV: Multiple cpu?

[Julian Field]

At 15:11 18/09/2002, you wrote:
>On Wed, 2002-09-18 at 08:48, Anders Andersson, IT wrote:
> > Hmm, now I feel stupid but I have to ask.
> > Whats the differense between instances and child processes?
>
>The difference is effectively just the way the the multiple processes
>are handled. The current (V3) code wasn't designed for multiple MS
>processes, so you have to run multiple copies (instances). So I refer to
>using multiple instances of MS, with the queue's managed by a separate
>process. Each instance of MS in a multi-process scenario is running
>continuously.
>
>The upcoming V4 code runs a single master process that spawns off
>children as necessary (up to some configured max number) to handle the
>load.

That's all correct and more accurate than my previous posting :-)

>  Child processes do their work and exit so that they don't needless
>consume resources. At least that's what I assume Julian has done.

They run for a few hours then die and are restarted by the master.


> > You all probably figured out my level of expertice  =(
> > but this is something I relly need to understand.
> > My guess from the begining was thats with 2 cpu MS would be
> > able to scan faster. But know Im not sure If I should spend the
> > extra money.
> > Does 2 cpu demands extra config or will it handle it by it self?
> >
>You won't gain much advantage as far as MS is concerned from a
>multi-processor box. However, MS isn't the only thing active on a system
>that also happens to be running MS, so the other processor will get used
>but things like the sendmail and other tasks the system runs. My
>personal recommendation is to go with a multi-processor if you have a
>significant mail load.
>--
>The instructions said to use Windows 98 or better, so I installed
>RedHat.

--
Julian Field                Teaching Systems Manager
jkf at ecs.soton.ac.uk         Dept. of Electronics & Computer Science
Tel. 023 8059 2817          University of Southampton
                             Southampton SO17 1BJ