Twitterのデータ構造？

http://ameblo.jp/hkunimitsu/entry-10102515852.html
http://japan.cnet.com/news/media/story/0,2000056023,20374455,00.htm
http://www.publickey1.jp/blog/10/twitterdiggnosqlcassandra.html
http://japan.zdnet.com/fyi/story/0,3800100774,20409165,00.htm
http://sourceforge.jp/magazine/10/03/02/0350225
http://www.java-kuche.org/download/2009osc/GAECloud.pdf
http://twitter.com/asami224
http://www.atmarkit.co.jp/im/carc/serial/relaxer01/relaxer01.html
http://www.itmedia.co.jp/enterprise/special/dev_marulec/2008.html
http://agilecat.wordpress.com/2010/03/01/twitter-%E3%81%8C-cassandra-%E3%82%92%E9%81%B8%E3%82%93%E3%81%A0%E7%90%86%E7%94%B1-mynosql-nosql-cloud-cloudcomputing-twitter-cassandra/
http://sourceforge.jp/magazine/10/02/24/0432216
http://agilecat.wordpress.com/2010/03/09/%E3%82%A4%E3%83%99%E3%83%B3%E3%83%81%E3%83%A5%E3%82%A2%E3%83%AB%EF%BD%A5%E3%82%B3%E3%83%B3%E3%82%B7%E3%82%B9%E3%83%86%E3%83%B3%E3%82%B7%E3%83%BC%E3%81%AF%E3%81%8A%E5%A5%BD%E3%81%8D%EF%BC%9F%EF%BC%88am/
http://agilecat.wordpress.com/2010/02/10/cassandra-%E5%88%86%E6%95%A3%E3%83%87%E3%83%BC%E3%82%BF%E3%83%99%E3%83%BC%E3%82%B9%E3%81%A7%E3%81%AE%E5%89%8A%E9%99%A4%E3%81%A8%E3%81%AF%EF%BC%9F-cassandra-nosql/
NoSQL*