Your input data set appears to be sorted. Is that intentional? If that's the case you're in luck. You only need to keep track of a single name at a time. Walk through the input file line by line. Each time the name changes, write the previous name to an output file along with an extension summary.


Dave

In reply to Re: Large file, multi dimensional hash - out of memory by davido
in thread Large file, multi dimensional hash - out of memory by Anonymous Monk

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