[Beowulf] Can one Infiniband net support MPI and a parallel filesystem?

Chris Samuel csamuel at vpac.org
Mon Aug 18 23:21:39 EDT 2008


----- "Bogdan Costescu" <Bogdan.Costescu at iwr.uni-heidelberg.de> wrote:

> Are there any scheduling tools to keep track of a user's accuracy in 
> specifying job runtime

The Cluster Resources Moab scheduler tracks this per
user, group and account; so for example if you do
showstats -u the final column will be the info you
want for each user.

Alternatively showstats -f WCACCURACY will generate
a matrix of walltime against number of CPUs with the
intersect being the average accuracy for jobs of
that length and size.

> and adding this info similar to fairshare in
> priority calculations ?

Yes you can if you're feeling particularly Machiavellian.. ;-)

 http://www.clusterresources.com/products/mwm/docs/5.1.2priorityfactors.shtml

In the fairshare (FS) section you'll see:

 WCACCURACY - user's current historical job wallclock
 accuracy calculated as total processor-seconds
 dedicated / total processor-seconds requested

 NOTE: Factor values are in the range of 0.0 to 1.0.

Again you'll need to decide whether you do that on
a user, group or account basis (or some combination
thereof).

cheers!
Chris
-- 
Christopher Samuel - (03) 9925 4751 - Systems Manager
 The Victorian Partnership for Advanced Computing
 P.O. Box 201, Carlton South, VIC 3053, Australia
VPAC is a not-for-profit Registered Research Agency
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