I note that you have:

   $old_tab{ $cli } = $portingID if $filenum==1;
   $new_tab{ $cli } = $portingID if $filenum==2;

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You'd save memory by packing the old and new $portingID together and using just one hash table. Shouldn't take long to try it and see if it's enough of a saving.

In reply to Re: How store a hash table on disk and work with it by gone2015
in thread How store a hash table on disk and work with it by ReneB

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