http://www.oschina.net/p/couchdb
http://www.oschina.net/p/cassandra
http://hadoop.apache.org/
http://www.oschina.net/p/memcached
http://cloud.csdn.net/a/20110303/292969.html
http://blog.nosqlfan.com/tags/cassandra
http://blog.nosqlfan.com/
http://www.open-open.com/76.htm
http://cloud.csdn.net/a/20111128/308200.html
http://www.kafka0102.com/2011/02/430.html