As I said, BerkeleyDB is the most recommended solution for disk-based hashes.

Alternatives include MLDBM, SQLite_file, DBM::Deep etc.

Or you could use an RDBMS (Postgres/MySQL/other). Perhaps via Tie::DBI.

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^5: a large text file into hash by BrowserUk
in thread Reaped: a large text file into hash by NodeReaper

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