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.
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