Memcached 是一个高性能的分布式内存对象缓存系统，用于动态Web应用以减轻数据库负载。它通过在内存中缓存数据和对象来减少读取数据库的次数，从而提高动态、数据库驱动网站的速度。Memcached基于一个存储键/值对的hashmap。其守护进程（daemon ）是用C写的，但是客户端可以用任何语言来编写.-Memcached is a high-performance, distributed memory object caching system for dynamic Web applications in order to reduce database load. It does this by caching data and objects in memory to reduce the number of read the database, thereby increasing the speed of dynamic, database-driven Web site. Memcached based on a store key/value pairs hashmap. Its daemon (daemon) is written in C, but the client can be written in any language.