[GE users] Comparison of MPI Job Runtimes with and without SGE

Waseem Ahmad Waseem.Ahmad.1 at Sun.COM
Wed Aug 11 22:19:09 BST 2004

Hello all!

    I was running an MPI job on my solaris cluster. I found out that the 
job actually takes less amount of time to execute with MPICH tightly 
integrated with SGE than when it runs through plain MPICH only. Note 
that there is no other user load on the cluster. and this MPI job is 
only user job running on the cluster. and most impoprtantly i am feeding 
  eaxctly the same set of machines to the job (when it running through 
plain MPICH) as SGE_tight integration makes the job run on.
I would assume, given that both times job is run on the same set of 
nodes, SGE should incur more cost as comapred to MPICH?. Any idea ?


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