I dont want other monks to get mis-directed by pasting the code.

Let "other monks" look after themselves.

If your code is taking 2 1/2 hours to process 20 million records against 600 records stored in a hash, then it is your code that has problems. Should we try and guess what mistakes you are making?

Are you for instance, treating the hash as an array? Or re-opening the output files for every record you write?

Post the code and we won't have to make such guesses.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: how to split huge file reading into multiple threads by BrowserUk
in thread how to split huge file reading into multiple threads by sagarika

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