[StarCluster] MPICH Fabric

[David Stuebe]

Hi Starcluster

Do anyone have advice on what fabric to use when running on AWS?

I know the interconnect is supposed to be 10-gigE but my model is more dependent on latency than throughput.

I have had to use the Intel Cluster Compiler Suite rather than the built in OpenMPI. Hoping to resolve those issues and compare the two – I am interested to see the performance differences…

Currently the model actually has a negative performance curve as I add processors past a single node.

Model performance on running on Amazon…
C3.8Xlarge - 1 instance, 32 cores
 !   IINT         SIMTIME(UTC)             FINISH IN       SECS/IT   PERCENT COMPLETE
!8396282   2014-03-18T00:18:02.000000   0000:07:54:19     0.1103  |                    |

C3.8Xlarge - 2 instance, 64 cores
 !8395221   2014-03-18T00:00:21.000000   0000:20:27:58     0.2843  |                    |

C3.8Xlarge - 3 instance, 96 cores
!8395273   2014-03-18T00:01:13.000000   0007:18:33:19     2.5918  |                    |


David Stuebe
Scientist & Software Engineer – RPS ASA

55 Village Square Drive
South Kingstown, RI 02879-8248

Tel: +1 (401) 789-6224
Email: David.Stuebe at rpsgroup.com<mailto:David.Stuebe at rpsgroup.com>
www: asascience.com<http://www.asascience.com/> | rpsgroup.com<http://www.rpsgroup.com/>

A member of the RPS Group plc
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