Supported memcache commands
===========================

  * get(also mutiple get)
  * set, add, replace
  * incr, decr
  * delete
  * stats(malloc, maps) 

Private commands
=================

  * db_checkpoint
  * db_archive
  * rep_ismaster
  * rep_whoismaster
  * rep_set_priority
  * rep_set_ack_policy
  * rep_set_ack_timeout
  * stats(bdb, rep)