Ocsipersist is an extension for ocsigen server to use a key/value store. It's used pervasively in Eliom to handle sessions and references.
The project contains several backends:
Each backend must implement the signature Ocsipersist_sig in a module named Ocsipersist. Only one backend can be used at a time, and the choice is done by linking the chosen backend.
You can install with opam:
opam install ocsipersist