http://redis.io/topics/twitter-clone
http://www.elasticsearch.org/guide/reference/api/
global
1.mysql index innodb（B+-tree）http://en.wikipedia.org/wiki/B-tree
http://en.wikipedia.org/wiki/B%2B_tree
Figure 3-9 is an abstract diagram of how InnoDB and MyISAM arrange the table.
This illustration makes it easier to see how differently InnoDB and MyISAM store
data and indexes.
[img]http://dl.iteye.com/upload/attachment/539521/d560ed4a-d621-3760-b0a5-a2c270f77e10.png[/img]
http://www.elasticsearch.org/guide/reference/api/
global
1.mysql index innodb（B+-tree）http://en.wikipedia.org/wiki/B-tree
http://en.wikipedia.org/wiki/B%2B_tree
Figure 3-9 is an abstract diagram of how InnoDB and MyISAM arrange the table.
This illustration makes it easier to see how differently InnoDB and MyISAM store
data and indexes.
[img]http://dl.iteye.com/upload/attachment/539521/d560ed4a-d621-3760-b0a5-a2c270f77e10.png[/img]
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