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I have a local machine running MacOS (four 64-bit CPU cores), and a remote machine running Linux (two 32-bit CPU cores), and I can install and run commands from the respective (architecture-dependent) MathLink C executable on each machine separately. Is it possible to parallelize a computation that uses the native MathLink executable on each machine, from a single Mma evaluation on one machine?

Having set up remote kernels in the preferences, I am able to confirm remote functionality using

LaunchKernels[];
ParallelEvaluate[$MachineName]

{"mac", "mac", "mac", "mac", "linux", "linux"}

I thought this might work:

kernels=Kernels[]; (* first four are local machine, last two are remote machine *)

(* Install local executable on local kernels *)
ParallelEvaluate[Install["path to local MathLink executable"], kernels[[1;;4]]];
(* Install remote executable on remote kernels *)
ParallelEvaluate[Install["path to remote MathLink executable"], kernels[[5;;6]]]

but the 2nd evaluation returns

LinkOpen::linke: Could not find MathLink executable.
LinkOpen::linke: Could not find MathLink executable.
{$Failed, $Failed}

I also tried copying the remote executable to the local machine, and used that path for the remote kernel ParallelEvaluate call. The evaluation simply hangs in this case.

share|improve this question
Which method is used to launch the remote Linux kernels (Lightweight Grid, Cluster Integration or Remote Kernels)? – sakra Apr 4 '12 at 20:12
@sakra Remote Kernels – JxB Apr 5 '12 at 4:22
Double check that the path to remote MathLink program is executable for the SSH user that is used to login to the remote Linux machine. – sakra Apr 5 '12 at 8:09
I am voting to close this one as TL since it should work if the paths are correct, but it is not clear what paths have been entered here. – Oleksandr R. Mar 27 at 8:54

closed as too localized by Oleksandr R., whuber, m_goldberg, rm -rf♦ Mar 28 at 5:25

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