Hadoop in Action Chuck Lam
Publisher: Manning Publications

Quoting from Chuck Lam's 'Hadoop in Action': "A combiner doesn't necessarily improve performance. Take, for example, the following test case, which runs a Pi calculation job on the Hadoop cluster. Hadoop支持非java预言来编写程序，这就会用到Streaming的通用API。HadoopStreaming使用流与程序进行交互。从STDIN输入数据，输出到STDOUT。数据必须为文本，而且每一行被视为一条记录。 用Streaming处理键-.. A while back, a good friend of mine gave me a book on Hadoop; Hadoop in Action. The intended readers are programmers, architects, and project managers who have to process large amounts of data offline. Last week Dell Zhang kindly invited me to give a guest lecture to Birkbeck and UCL students on his Cloud Computing course. €Hadoop in Action” (LAM10) has been published in December 2010 and is therefore more up-to-date than the others. Hadoop in Action Publisher: Man nin g Publications 2011 | 325 Pages | ISBN: 1935182196 | PDF | 16 MB Hadoop in Action teaches readers how to use Hadoop and write MapReduce programs. In above case, FS action will work fine because no map-reduce opertion is perform in FS action case. January 18, 2011 Dreamtech Press Leave a comment Go to comments. Hadoop in Action teaches readers how to use Hadoop and write MapReduce programs. HiveMain.runHive(HiveMain.java:292) at org.apache.oozie.action.hadoop.HiveMain.run(HiveMain.java:269) at org.apache.oozie.action.hadoop.LauncherMain.run(LauncherMain.java:37) at org.apache.oozie.action.hadoop.