http://www.cnblogs.com/zhangchaoyang/articles/2647905.html
http://blog.pureisle.net/archives/1618.html
http://www.csdn.net/article/2014-01-01/2817984-13-tools-let-hadoop-fly
http://blog.mortardata.com/post/82002488484/hadoop-weekly-april-7-2014
https://www.mapr.com/company/press-releases/mapr-technologies-expands-big-data-search-elasticsearch/