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课程：         https://www.coursera.org

spark:        http://www.cnblogs.com/one–way/

http://lib.csdn.net/my/structure/%E6%B7%B1%E5%BA%A6%E5%AD%A6%E4%B9%A0

http://jinnianshilongnian.iteye.com/blog/2263778

https://blogs.apache.org/flume/