UDAS

UDAS 的全称：uniform  data access source

  我们应用服务器的UDAS可分为：Berkeley DB (BDB) 、OSCache、FlexCache 这三部分

 

Memcache : http://www.winterhack.com/archives/2598.html

 

Free & open source, high-performance, distributed memory object caching system , generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load .

Memcached is an in-memory key-value store for small chunks of arbitrary data (strings, objects) from results of database calls, API calls, or page rendering.

Memcached is simple yet powerful. Its simple design promotes quick deployment, ease of development, and solves many problems facing large data caches. Its API is available for most popular languages

 

google code ： http://code.google.com/p/memcached/

51CTO blog :http://huqilong.blog.51cto.com/53638/104526

 

Oracle Berkeley DB 11g

Berkeley DB enables the development of custom data management solutions, without the overhead traditionally associated with such custom projects. Berkeley DB provides a collection of well-proven building-block technologies that can be configured to address any application need from the handheld device to the datacenter, from a local storage solution to a world-wide distributed one, from kilobytes to petabytes.