The node you replied to is the answer to your question. DBM::Deep is exactly the way to have a hash use disk instead of RAM.
My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re^3: How to save memory, parsing a big file. by dragonchild
in thread How to save memory, parsing a big file. by idle

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