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

Bogdan Costescu Bogdan.Costescu at iwr.uni-heidelberg.de
Mon Aug 18 07:09:30 PDT 2008

On Fri, 15 Aug 2008, Mark Hahn wrote:

> unless backfill can utilize those temporarily idle cpus.

Improving cluster usage through backfill works as long as users take 
care of specifying accurate information about their jobs; f.e. if the 
max job runtime is set to 24h and users specify a runtime of 24h for 
all their jobs out of habit or ignorance although their jobs don't 
require more than f.e. 16h then backfill doesn't provide much value. 
The admin who tries to maximize the usage figures has no chance of 
achieving his/her goals if the users don't play the same game...

Are there any scheduling tools to keep track of a user's accuracy in 
specifying job runtime and adding this info similar to fairshare in 
priority calculations ?

Bogdan Costescu

IWR, University of Heidelberg, INF 368, D-69120 Heidelberg, Germany
Phone: +49 6221 54 8869/8240, Fax: +49 6221 54 8868/8850
E-mail: bogdan.costescu at iwr.uni-heidelberg.de

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