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Apache > HadoopTopWikiAboutWelcomeReleasesMailing ListsIssue TrackingWho We Are?Who Uses Hadoop?Buy StuffSponsorshipThanksPrivacy PolicyBylawsLicenseDocumentationCurrentStableRelease 1.2.1Release 2.5.2Release 0.23.11Related ProjectsAmbariAvroCassandraChukwaHamaHBaseHiveMahoutPigSparkTezZooKeeperPDFWelcome to Apache™ Hadoop®!What Is Apache Hadoop?Getting StartedDownload HadoopWho Uses Hadoop?News19 November, 2014: release 2.5.2 available12 September, 2014: release 2.5.1 available11 August, 2014: release 2.5.0 available30 June, 2014: release 2.4.1 available27 June, 2014: release 0.23.11 available07 April, 2014: release 2.4.0 available20 February, 2014: release 2.3.0 available11 December, 2013: release 0.23.10 available15 October, 2013: release 2.2.0 available25 August, 2013: release 2.1.0-beta available27 December, 2011: release 1.0.0 availableMarch 2011 - Apache Hadoop takes top prize at Media Guardian Innovation AwardsJanuary 2011 - ZooKeeper GraduatesSeptember 2010 - Hive and Pig GraduateMay 2010 - Avro and HBase GraduateJuly 2009 - New Hadoop SubprojectsMarch 2009 - ApacheCon EUNovember 2008 - ApacheCon USJuly 2008 - Hadoop Wins Terabyte Sort BenchmarkWhat Is Apache Hadoop?The Apache™ Hadoop® project develops open-source software forreliable, scalable, distributed computing.The Apache Hadoop software library is a framework thatallows for the distributed processing of large data sets across clustersof computers using simple programming models. It is designed to scale upfrom single servers to thousands of machines, each offering localcomputation and storage. Rather than rely on hardware to deliverhigh-availability, the library itself is designed to detect and handlefailures at the application layer, so delivering a highly-availableservice on top of a cluster of computers, each of which may be prone tofailures.The project includes these modules:Hadoop Common: The common utilities that support the other Hadoop modules.Hadoop Distributed File System (HDFS™): A distributed file system that provides high-throughput access to application data.Hadoop YARN: A framework for job scheduling and cluster resource management.Hadoop MapReduce: A YARN-based system for parallel processing of large data sets.Other Hadoop-related projects at Apache include:Ambari™: A web-based tool for provisioning, managing, and monitoring Apache Hadoop clusters which includes support for Hadoop HDFS, Hadoop MapReduce, Hive, HCatalog, HBase, ZooKeeper, Oozie, Pig and Sqoop. Ambari also providesa dashboard for viewing cluster health such as heatmaps and ability toview MapReduce, Pig and Hive applications visually alongwith features to diagnose their performance characteristics in a user-friendly manner.Avro™: A data serialization system.Cassandra™: A scalable multi-master database with no single points of failure.Chukwa™: A data collection system for managing large distributed systems.HBase™: A scalable, distributed databas
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