• cache:
    memcached
  • Persistent Storage solution:
    dbcached     = memcached + nmdb
    nmdb           = nmdb(memcached) => QDBM/berkeley db
    memcachedb = memcached(protocol) => berkeley db
    TokyoTyrant = memcached(protocol) => TokyoCabinet
  • dbm:
    TokyoCabinet(successor of QDBM)
    QDBM
    berkeley db