Mnesia is the Erlang built-in multi-master distributed database. Unfortunately, Mnesia only ships with support for two types of data storage (ets and dets) both of which have limitations.

This project defines a new behaviour mnesia_ext, and patches mnesia to support using modules which conform to the behaviour for storage. This allows for arbitrary storage strategies to be incorporated.

As a (useful!) example tcerl contains an implementation of an ordered_set disk-based mnesia table.

Another Dukes of Erl release.