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The Apache Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using a simple programming model. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage. Rather than rely on hardware to deliver high-avaiability, the library itself is designed to detect and handle failures at the application layer, so delivering a highly-availabile service on top of a cluster of computers, each of which may be prone to failures.
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Apache Hadoop es un framework de software que soporta aplicaciones distribuidas bajo una licencia libre.1 Permite a las aplicaciones trabajar con miles de nodos y petabytes de datos. Hadoop se inspiró en los documentos Google MapReduce y Google File System (GFS).
De la wiki
http://es.wikipedia.org/wiki/Hadoop
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