The Memcached caching backend provides a caching layer on top of a persistent backend. It operates transparently intercepting calls to the primary backend and sets and gets data from a Memcached pool of servers lowering the load on the primary and increasing performance.
The memcached caching backend is powered by libmemcached a full featured C memcached client library.
MEMCACHED_SERVERS = <server.one:port,server.two:port,...>