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| <h5>MapReduce</h5> |
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| <a href="../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/SharedCacheSupport.html">Support for YARN Shared Cache</a> |
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| <h5>MapReduce REST APIs</h5> |
| <ul> |
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| <a href="../../../hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapredAppMasterRest.html">MR Application Master</a> |
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| <h5>YARN</h5> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/YARN.html">Architecture</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/FairScheduler.html">Fair Scheduler</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerHA.html">ResourceManager HA</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceModel.html">Resource Model</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/NodeLabel.html">Node Labels</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/NodeAttributes.html">Node Attributes</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/WebApplicationProxy.html">Web Application Proxy</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html">Timeline Server</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/NodeManagerCgroups.html">Using CGroups</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/SecureContainer.html">Secure Containers</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/ReservationSystem.html">Reservation System</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/GracefulDecommission.html">Graceful Decommission</a> |
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| <li class="none"> |
| <a href="../../../hadoop-yarn/hadoop-yarn-site/OpportunisticContainers.html">Opportunistic Containers</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/Federation.html">YARN Federation</a> |
| </li> |
| <li class="none"> |
| <a href="../../../hadoop-yarn/hadoop-yarn-site/SharedCache.html">Shared Cache</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/UsingGpus.html">Using GPU</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/UsingFPGA.html">Using FPGA</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/PlacementConstraints.html">Placement Constraints</a> |
| </li> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/YarnUI2.html">YARN UI2</a> |
| </li> |
| </ul> |
| <h5>YARN REST APIs</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/NodeManagerRest.html">Node Manager</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServer.html#Timeline_Server_REST_API_v1">Timeline Server</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/TimelineServiceV2.html#Timeline_Service_v.2_REST_API">Timeline Service V.2</a> |
| </li> |
| </ul> |
| <h5>YARN Service</h5> |
| <ul> |
| <li class="none"> |
| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Overview.html">Overview</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/QuickStart.html">QuickStart</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/Concepts.html">Concepts</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/YarnServiceAPI.html">Yarn Service API</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/ServiceDiscovery.html">Service Discovery</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-site/yarn-service/SystemServices.html">System Services</a> |
| </li> |
| </ul> |
| <h5>Hadoop Compatible File Systems</h5> |
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| <a href="../../../hadoop-aws/tools/hadoop-aws/index.html">Amazon S3</a> |
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| <a href="../../../hadoop-azure-datalake/index.html">Azure Data Lake Storage</a> |
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| <a href="../../../hadoop-openstack/index.html">OpenStack Swift</a> |
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| <a href="../../../hadoop-cos/cloud-storage/index.html">Tencent COS</a> |
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| <h5>Auth</h5> |
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| <h5>Tools</h5> |
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| <a href="../../../hadoop-archive-logs/HadoopArchiveLogs.html">Hadoop Archive Logs</a> |
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| <a href="../../../hadoop-distcp/DistCp.html">DistCp</a> |
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| <a href="../../../hadoop-gridmix/GridMix.html">GridMix</a> |
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| <a href="../../../hadoop-rumen/Rumen.html">Rumen</a> |
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| <a href="../../../hadoop-resourceestimator/ResourceEstimator.html">Resource Estimator Service</a> |
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| <a href="../../../hadoop-project-dist/hadoop-common/Benchmarking.html">Hadoop Benchmarking</a> |
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| <a href="../../../hadoop-dynamometer/Dynamometer.html">Dynamometer</a> |
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| <h5>Reference</h5> |
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| <a href="../../../hadoop-project-dist/hadoop-common/Metrics.html">Metrics</a> |
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| </ul> |
| <h5>Configuration</h5> |
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| <a href="../../../hadoop-project-dist/hadoop-common/core-default.xml">core-default.xml</a> |
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| <a href="../../../hadoop-yarn/hadoop-yarn-common/yarn-default.xml">yarn-default.xml</a> |
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| <a href="../../../hadoop-kms/kms-default.html">kms-default.xml</a> |
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| <a href="../../../hadoop-hdfs-httpfs/httpfs-default.html">httpfs-default.xml</a> |
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| Licensed under the Apache License, Version 2.0 (the "License"); |
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| <h1>The S3N Client</h1> |
| <ul> |
| <li><a href="#How_to_migrate_to_to_the_S3A_client"> How to migrate to to the S3A client</a></li></ul> |
| |
| <p>S3N was a Hadoop filesystem client which can read or write data stored in Amazon S3. It uses URLs with the schema <tt>s3n://</tt>.</p><hr /> |
| <p><b>Hadoop’s S3N client for Amazon S3 has been superceded by the S3A connector</b></p> |
| <p><b>Please upgrade to S3A for a supported, higher-performance S3 Client</b></p><hr /> |
| <div class="section"> |
| <h2><a name="How_to_migrate_to_to_the_S3A_client"></a><a name="migrating"></a> How to migrate to to the S3A client</h2> |
| <ol style="list-style-type: decimal"> |
| |
| <li> |
| |
| <p>Keep the <tt>hadoop-aws</tt> JAR on your classpath.</p> |
| </li> |
| <li> |
| |
| <p>Add the <tt>aws-java-sdk-bundle.jar</tt> JAR which Hadoop ships with to your classpath.</p> |
| </li> |
| <li> |
| |
| <p>Change the authentication keys</p> |
| <table border="0" class="bodyTable"> |
| <thead> |
| |
| <tr class="a"> |
| <th> old key </th> |
| <th> new key </th></tr> |
| </thead><tbody> |
| |
| <tr class="b"> |
| <td> <tt>fs.s3n.awsAccessKeyId</tt> </td> |
| <td> <tt>fs.s3a.access.key</tt> </td></tr> |
| <tr class="a"> |
| <td> <tt>fs.s3n.awsSecretAccessKey</tt> </td> |
| <td> <tt>fs.s3a.secret.key</tt> </td></tr> |
| </tbody> |
| </table> |
| <p>Do make sure the property names are correct. For S3A, they are <tt>fs.s3a.access.key</tt> and <tt>fs.s3a.secret.key</tt> —you cannot just copy the S3N properties and replace <tt>s3n</tt> with <tt>s3a</tt>.</p> |
| </li> |
| <li> |
| |
| <p>Replace URLs which began with <tt>s3n://</tt> with <tt>s3a://</tt></p> |
| </li> |
| <li> |
| |
| <p>You may now remove the <tt>jets3t</tt> JAR, as it is no longer needed.</p> |
| </li> |
| </ol></div> |
| </div> |
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