[Beowulf] scheduler policy design

Leif Nixon nixon at nsc.liu.se
Thu Apr 26 05:48:49 PDT 2007

Chris Samuel <csamuel at vpac.org> writes:

> On Thu, 26 Apr 2007, Leif Nixon wrote:
>> We do advance reservation with backfill, so short jobs will on average
>> start sooner than long jobs.
> We use 3 different metrics to work out queue priorities on our clusters:

Basically, we do the same but without fairshare.

The largest problem is explaining backfill to irate users who feel
they are getting bypassed.

> As a result our clusters have run at a combined utilisation of 84%
> over the last 12 months.

Hah! Our two main systems are at 96% and 88%! 8^)

Leif Nixon                       -            Systems expert
National Supercomputer Centre    -      Linkoping University

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