[Users] Einstein toolkit with Sun Grid Engine

[Roland Haas]

Hello Chris,

We used SGE a long time ago on some of the TACC machines.

You can find an old setup for TACC's Ranger cluster in an old commit
like so:

git checkout fed9f8d6fae4c52ed2d0a688fcc99e51b94e608e

and then look at the "ranger" files in OUTDATED subdirectories of
machines, runscripts, submitscripts.

Having all MPI ranks on a single node might also be caused by using
different MPI stacks when compiling and when running so you must make
sure that the "mpirun" (or equivalent command) you use is the one that
belongs to the MPI library that you used when linking your code.

Finally you may also have to check if this is an issue with threads and
MPI ranks. Ie I would check if things are still wrong if you use only
MPI processes and no OpenMP threads at all (in that case you would have
to check what SGE counts: threads (cores) or MPI ranks (processes)).

Yours,
Roland

> Hi everyone,
> 
> I have set up the Einstein toolkit on a local cluster of 20 nodes with the SGE scheduler. I have not seen any examples of this scheduler being used with the Einstein toolkit.
> 
> I have managed to get it working; however it seems if I ask for a certain number of slots that requires more than one node, it correctly allocates these, however all processes and threads are run on the one node and is oversubscribed.
> 
> My question is whether anybody has used SGE with the Einstein toolkit and if this is a good thing or not? If it is possible, I can send more details if there are people willing to help solve this inter-node communication problem.
> 
> Thanks in advance,
> 
> Chris
> 
> [cid:29d54967-59c8-486e-adea-80af7ce2cc49]
> 
> 
> [cid:55ebbbb5-1e12-45a2-8d51-206c70460c36]
> 
> 
> 
> Dr Chris Stevens
> 
> Lecturer in Applied Mathematics
> 
> Rm 602, Jack Erskine building
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> School of Mathematics and Statistics
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