Welcome to the Couchbase memcached project.
This started as Couchbase's fork of the upstream memcached project.
It has subsequently evolved since then, so while it shares a name with
the upstream project many other things have changed, apart from the
name :) For now it's simpler to consider this as the frontend of the
Couchbase key-value engine. The primary backend of KV-engine is the
eventually persistent engine -
ep-engine.