Tie::DB_File::SplitHash

Designed for support of file size limited OSes. Transparently splits 
a DB_File database into as many distinct files as desired. Distributes
hash entries between the files using a randomization algorithm. 
Has the effect of allowing DB_File hashes to grow to the full size 
of the partition. Requires 'Digest::SHA1' and 'DB_File' to be installed.

WWW: http://search.cpan.org/dist/Tie-DB_File-SplitHash/