I want to have the data in memory only once, but having 4 processor cores working with them. Sounds easy, but I haven't found anything so far...

Getting threads to work with shared read/write memory is surprisingly hard. Ask any C++ programmer. Here's a tutorial on how to do it in Perl; it definitely exceeds the scope of a messageboard post. I have never uses Perl threads myself; back when I thought I needed them, Perl threads weren't stable yet, and I haven't actually needed them ever.

In a nutshell, life gets easier when you can use the data 100% read-only. Then you're not limited to threads as the only "easy" solution. You can just as easily whip up a forking version with parent-child communication or even a network server for the data, to which several lightweight forked processes connect.

In reply to Re: sharing datas between threads/forks (?) by gamache
in thread sharing datas between threads/forks (?) by Anonymous Monk

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