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Building Sage on the LittleFe Cluster

I've built Sage on the LittleFe teaching cluster, made of six Intel Atoms in a case I can carry from class to class (, if you're interested).

Sage works just fine on the head node, but won't detect the other nodes.

I ran import sage.parallel.ncpus and sage.parallel.ncpus.ncpus(), and just get 2, not the expected 12.

I tried putting "-machinefile ~/machines" into the argument of sage.parallel.ncpus.ncpus(), which is what I do with mpirun, but just got errors.