memcachedb是 一个开源项目，给memcached分布式缓存服务器添加了Berkeley DB的持久化存储机制和异步主辅复制机制，让memcached具备了事务恢复能力、持久化能力和分布式复制能力，非常适合于需要超高性能读写速度，但是 不需要严格事务约束，能够被持久化保存的应用场景。-”Memcachedb is a distributed key-value storage system designed

for persistent.”

A complete memcached, but

*NOT* a cache solution

Memcached is good enough for cache.

*NO* expiration

For memcache protocol compatible, still reserved, but we do nothing.

Totally for persistent

Transaction, replication, we do our best to achieve persistent.