in reply to
Re: Disk based hash (as opposed to RAM based)
in thread Disk based hash (as opposed to RAM based)
I think BrowserUk's mention of DBM::Deep is on track. It should be able to handle whatever level of depth you want to throw at it, and arbitrarily long key lengths. The fact that it's written in pure-Perl is a good feature, as its compatibility with Perl's flexible data types should be higher than is sometimes symptomatic of solutions built in the more rigid environment of lower-level statically typed languages.