There is, on the one hand, a Core-Module Called FileDB, wich enables you to ,simply saying, put a HASH on disk, but every access to the HASH then is a Filesystem-I/O operation (wich means it is slow).
There is another Module at CPAN, called BerkeleyDB, but the documentation has many TODOs in it.
Comment on Re^2: Optimizing Iterating over a giant hash
There is another Module at CPAN, called BerkeleyDB, but the documentation has many TODOs in it.
The TODOs are 100% for redundant documentation.
Like it says
The reader is expected to be familiar with the Berkeley DB documentation. Where the interface provided here is identical to the Berkeley DB library and the... http://www.oracle.com/technology/products/berkeley-db/db/index.html