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Thursday, June 18, 2009

Hadoop and Distributed Computing at Yahoo!

Apache Hadoop* is an open source Java software framework for running data-intensive applications on large clusters of commodity hardware. Hadoop, which was invented by Doug Cutting (now a Yahoo! employee), is a top level Apache project. It relies on an active community of contributors from all over the world for its success.

Hadoop implements two important elements. The first is a computational paradigm called Map/Reduce, which takes an application and divides it into multiple fragments of work, each of which can be executed on any node in the cluster. The second is a distributed file system called HDFS. HDFS stores data on nodes in the cluster with the goal of providing greater bandwidth across the cluster.

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