[GE users] Job fragmentation of sge 6.0u8

Alessio Comisso alessio.comisso at gmail.com
Mon Jul 28 16:28:41 BST 2008


Dear all,
This is the first time I am writing to this forum, I hope it is the  
right place where to ask for support.
I have a cluster running mpi jobs, but happens that more jobs are  
scheduled in the same node, for instance a qstat -f gives

infini.q at node089.beowulf.clust BIP   4/4       4.00     lx26-amd64
   10568 0.53560 x88-PTCDA- toton        r     07/27/2008 08:50:15     2
   10632 0.62232 test-PAW   levita       r     07/28/2008 12:53:39     2

This in-homogeneous usage is not optimal, as the CPU usage is very low.

                                                                         
     %CPU
22190 levita    25   0  289m 182m 5772 R 53.3  2.3 108:12.66  
pwcapablanca.x
22191 levita    25   0  289m 189m  13m R 51.3  2.4 110:20.80  
pwcapablanca.x
12688 toton     25   0  459m 411m  13m R 48.6  5.2   1031:20 siesta
12689 toton     25   0  207m 147m 6072 R 46.6  1.9   1037:39 siesta


How can I tell the nodes to accept only a single job (or a single  
user)? The installed version does not support the quotas.

Kind Regards
Alessio 

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