Look at :
http://openmosix.sourceforge.net/

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Generally, how do I write an openMosix-aware program?
Write your programs as you normally would. Any processes that you spawn are candidates for migration to another node.
Can I write openMosix programs in perl?
Yes. Use the Parallel::ForkManager? available from CPAN or directly from http://www.cpan.org/authors/id/D/DL/DLUX/Parallel-ForkManager-x.x.x.tar.gz.
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