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Hadoop in Action Chuck Lam
Publisher: Manning Publications

Ǽ�写可扩展的,分布式的,海量数据处理的程序的基础. Take, for example, the following test case, which runs a Pi calculation job on the Hadoop cluster. Hadoop and its Ecosystem Components in Action. And most of those classes have been deprecated in 0.20.2. You must register at http://www.eventbrite.com/event/3859221034 in order to be admitted to the building and attend. Ǽ�写一个简单的MapReduce程序. Their interest in the tools to take advantage of the opportunity for analysis of all this data has sparked a land grab among established vendors and startups alike. This command uses a bootstrap action provided by Elastic MapReduce that will override the settings in the Hadoop site config with settings loaded from a file in S3. Apache Hadoop is ideal for organizations with a growing need to process massive application datasets. The signatures of the new classes are different. Both hadoop in action & the definitive guide, both have built their foundation from the mapred classes. Quoting from Chuck Lam's 'Hadoop in Action': "A combiner doesn't necessarily improve performance.