What is MemcacheDB?

MemcacheDB is a distributed key-value storage system designed for persistent. It is NOT a cache solution, but a persistent storage engine for fast and reliable key-value based object storage and retrieval. It conforms to memcache protocol(not completed, see below), so any memcached client can have connectivity with it. MemcacheDB uses Berkeley DB as a storing backend, so lots of features including transaction and replication are supported.

Features

• High performance read/write for a key-value based object
• High reliable persistent storage with transaction
• High availability data storage with replication
• Memcache protocol compatibility

Supported memcache commands

get(also mutiple get) set, add, replace append/prepend incr, decr delete stats

Private commands

rget db_checkpoint db_archive rep_set_priority stats rep stats repmgr stats repms

Some Warning

Expire time has been discarded in MemcacheDB(we are for persistent:p), so you should not use any corresponding features of clients. The daemon does nothing while you give a expire time to an item.

For more info, see: http://memcachedb.org