[Beowulf] Python libraries slow to load across Scyld cluster

[John Hearns]

When I run that with mpirun -host n0 python cached_imports_collections.py, it initially takes about 10 seconds to import. However, repeated runs take less time, until it takes less than 0.01 seconds to import.

Please forgive me for saying this.
If this is not an MPI code maybe you would be better running it using some sort of parallel shell, eg. pdsh

Skylar mentions strace.
Worth looking at Breeze from Ellexus for situations like this: http://www.ellexus.com/

(Disclaimer: this is a commercial application.)


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