[Beowulf] cluster sharing

[Toon Knapen]

Hello Amjad,

You need exclusive access to (part of) the cluster. Generally a batch
scheduler is available that will schedule the jobs of multiple users on
generally a FIFO basis, guaranteeing exclusive access and thus optimal
performance.


On Thu, Dec 10, 2009 at 2:46 AM, amjad ali <amjad11 at gmail.com> wrote:

> Hi all,
>
> I am usually running my parallel jobs on the university cluster of several
> hundred nodes (accessible to all). So often I observe very different total
> MPI_Wtime value when I run my program (even of same problem size) on
> different occasion.
>
> How should I make a reasonable performance measurement in such a case? Is
> it fine to get speedup/measurements on such a shared cluster?
>
>
> Thanks.
>
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