streaming
http://hadoop.apache.org/common/docs/r0.21.0/cn/streaming.html#Hadoop+Streaming
http://dongxicheng.org/mapreduce/hadoop-streaming-programming/
http://dongxicheng.org/mapreduce/hadoop-streaming-advanced-programming/
http://blog.csdn.net/yfkiss/article/category/817084
pipes
http://www.wikieno.com/tag/hadoop-pipes/
http://blog.csdn.net/USTCer_9801/article/details/5945883