On Wed, 21 Mar 2007, Ilja Livenson wrote:
> Sorry, but what does scalability mean in this case? Less memory?
Less CPU consumption when the CE handles many hundreds of jobs in parallel.
> Maarten Litmaath wrote:
> > Stephen Childs wrote:
> >
> >> We've just changed over to the pbs job manager from the lcgpbs
> >> jobmanager in order to fit in with the RB restrictions on MPI jobs
> >> and I've noticed a massive speedup.
> >>
> >> A simple globus-job-run completes in < 25 seconds (compared to around
> >> 2 minutes for lcgpbs) and a job submitted through the RB completes in
> >> just over 2 minutes (compared to around 5-6 minutes for lcgpbs).
> >>
> >> I thought this change wouldn't make a huge difference as I thought
> >> most of the delay was in the RB. Has anyone else noticed this or was
> >> there something horribly wrong with our lcgpbs jobmanager that was
> >> causing the slowdown.
> >
> > The "lcg" job managers have been coded for scalability instead of speed.
> > Normally those few minutes of delay are irrelevant.
>
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