Look at it from another side: would it work for your purpose if you randomize the distribution of the data (on a line by line basis? This is not clear in your question) in the file over the different processes, rather than randomizing the data in the file and then handing the randomized data sequentially to the various processes?

Perhaps we can be of more help if you describe what exactly is the set-up and what needs to be done.

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law

In reply to Re: Randomizing Big Files by CountZero
in thread Randomizing Big Files by Anonymous Monk

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