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 <h1 title="Uses of Package org.apache.hadoop.mapreduce" class="title">Uses of Package<br>org.apache.hadoop.mapreduce</h1>
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 <table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing packages, and an explanation">
 <caption><span>Packages that use <a href="../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a></span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colFirst" scope="col">Package</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tbody>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.fs.s3a.commit">org.apache.hadoop.fs.s3a.commit</a></td>
 <td class="colLast">
 <div class="block">Support for committing the output of analytics jobs directly to S3.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.fs.s3a.commit.magic">org.apache.hadoop.fs.s3a.commit.magic</a></td>
 <td class="colLast">
 <div class="block">This is the "Magic" committer and support.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapred">org.apache.hadoop.mapred</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce">org.apache.hadoop.mapreduce</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.counters">org.apache.hadoop.mapreduce.counters</a></td>
 <td class="colLast">
 <div class="block">This package contains the implementations of different types of
  map-reduce counters.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.aggregate">org.apache.hadoop.mapreduce.lib.aggregate</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.chain">org.apache.hadoop.mapreduce.lib.chain</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.db">org.apache.hadoop.mapreduce.lib.db</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.fieldsel">org.apache.hadoop.mapreduce.lib.fieldsel</a></td>
 <td class="colLast">&nbsp;</td>
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 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.input">org.apache.hadoop.mapreduce.lib.input</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.jobcontrol">org.apache.hadoop.mapreduce.lib.jobcontrol</a></td>
 <td class="colLast">&nbsp;</td>
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 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.join">org.apache.hadoop.mapreduce.lib.join</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.map">org.apache.hadoop.mapreduce.lib.map</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.output">org.apache.hadoop.mapreduce.lib.output</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.partition">org.apache.hadoop.mapreduce.lib.partition</a></td>
 <td class="colLast">&nbsp;</td>
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 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.lib.reduce">org.apache.hadoop.mapreduce.lib.reduce</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.task">org.apache.hadoop.mapreduce.task</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><a href="#org.apache.hadoop.mapreduce.tools">org.apache.hadoop.mapreduce.tools</a></td>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><a href="#org.apache.hadoop.tools">org.apache.hadoop.tools</a></td>
 <td class="colLast">
 <div class="block">Command-line tools for MapReduce.</div>
 </td>
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 <caption><span>Classes in <a href="../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a> used by org.apache.hadoop.fs.s3a.commit</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Class and Description</th>
 </tr>
 <tbody>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/OutputCommitter.html#org.apache.hadoop.fs.s3a.commit">OutputCommitter</a>
 <div class="block"><code>OutputCommitter</code> describes the commit of task output for a
  Map-Reduce job.</div>
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 </tbody>
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 </li>
 <li class="blockList"><a name="org.apache.hadoop.fs.s3a.commit.magic">
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 <caption><span>Classes in <a href="../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a> used by org.apache.hadoop.fs.s3a.commit.magic</span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Class and Description</th>
 </tr>
 <tbody>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobContext.html#org.apache.hadoop.fs.s3a.commit.magic">JobContext</a>
 <div class="block">A read-only view of the job that is provided to the tasks while they
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/OutputCommitter.html#org.apache.hadoop.fs.s3a.commit.magic">OutputCommitter</a>
 <div class="block"><code>OutputCommitter</code> describes the commit of task output for a
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 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskAttemptContext.html#org.apache.hadoop.fs.s3a.commit.magic">TaskAttemptContext</a>
 <div class="block">The context for task attempts.</div>
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 <th class="colOne" scope="col">Class and Description</th>
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 <tbody>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Cluster.html#org.apache.hadoop.mapred">Cluster</a>
 <div class="block">Provides a way to access information about the map/reduce cluster.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Counter.html#org.apache.hadoop.mapred">Counter</a>
 <div class="block">A named counter that tracks the progress of a map/reduce job.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Counters.html#org.apache.hadoop.mapred">Counters</a>
 <div class="block"><code>Counters</code> holds per job/task counters, defined either by the
  Map-Reduce framework or applications.</div>
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/ID.html#org.apache.hadoop.mapred">ID</a>
 <div class="block">A general identifier, which internally stores the id
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 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/InputSplit.html#org.apache.hadoop.mapred">InputSplit</a>
 <div class="block"><code>InputSplit</code> represents the data to be processed by an
  individual <a href="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a>.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobContext.html#org.apache.hadoop.mapred">JobContext</a>
 <div class="block">A read-only view of the job that is provided to the tasks while they
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 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobID.html#org.apache.hadoop.mapred">JobID</a>
 <div class="block">JobID represents the immutable and unique identifier for
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobStatus.html#org.apache.hadoop.mapred">JobStatus</a>
 <div class="block">Describes the current status of a job.</div>
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 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/OutputCommitter.html#org.apache.hadoop.mapred">OutputCommitter</a>
 <div class="block"><code>OutputCommitter</code> describes the commit of task output for a
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 </td>
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/QueueInfo.html#org.apache.hadoop.mapred">QueueInfo</a>
 <div class="block">Class that contains the information regarding the Job Queues which are
  maintained by the Hadoop Map/Reduce framework.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskAttemptContext.html#org.apache.hadoop.mapred">TaskAttemptContext</a>
 <div class="block">The context for task attempts.</div>
 </td>
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskAttemptID.html#org.apache.hadoop.mapred">TaskAttemptID</a>
 <div class="block">TaskAttemptID represents the immutable and unique identifier for
  a task attempt.</div>
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 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskCompletionEvent.html#org.apache.hadoop.mapred">TaskCompletionEvent</a>
 <div class="block">This is used to track task completion events on
  job tracker.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskID.html#org.apache.hadoop.mapred">TaskID</a>
 <div class="block">TaskID represents the immutable and unique identifier for
  a Map or Reduce Task.</div>
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 <table class="useSummary" border="0" cellpadding="3" cellspacing="0" summary="Use table, listing classes, and an explanation">
 <caption><span>Classes in <a href="../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a> used by <a href="../../../../org/apache/hadoop/mapreduce/package-summary.html">org.apache.hadoop.mapreduce</a></span><span class="tabEnd">&nbsp;</span></caption>
 <tr>
 <th class="colOne" scope="col">Class and Description</th>
 </tr>
 <tbody>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Cluster.html#org.apache.hadoop.mapreduce">Cluster</a>
 <div class="block">Provides a way to access information about the map/reduce cluster.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/ClusterMetrics.html#org.apache.hadoop.mapreduce">ClusterMetrics</a>
 <div class="block">Status information on the current state of the Map-Reduce cluster.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Counter.html#org.apache.hadoop.mapreduce">Counter</a>
 <div class="block">A named counter that tracks the progress of a map/reduce job.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Counters.html#org.apache.hadoop.mapreduce">Counters</a>
 <div class="block"><code>Counters</code> holds per job/task counters, defined either by the
  Map-Reduce framework or applications.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/ID.html#org.apache.hadoop.mapreduce">ID</a>
 <div class="block">A general identifier, which internally stores the id
  as an integer.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/InputFormat.html#org.apache.hadoop.mapreduce">InputFormat</a>
 <div class="block"><code>InputFormat</code> describes the input-specification for a
  Map-Reduce job.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/InputSplit.html#org.apache.hadoop.mapreduce">InputSplit</a>
 <div class="block"><code>InputSplit</code> represents the data to be processed by an
  individual <a href="../../../../org/apache/hadoop/mapreduce/Mapper.html" title="class in org.apache.hadoop.mapreduce"><code>Mapper</code></a>.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Job.html#org.apache.hadoop.mapreduce">Job</a>
 <div class="block">The job submitter's view of the Job.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobContext.html#org.apache.hadoop.mapreduce">JobContext</a>
 <div class="block">A read-only view of the job that is provided to the tasks while they
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobCounter.html#org.apache.hadoop.mapreduce">JobCounter</a>&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobID.html#org.apache.hadoop.mapreduce">JobID</a>
 <div class="block">JobID represents the immutable and unique identifier for
  the job.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobPriority.html#org.apache.hadoop.mapreduce">JobPriority</a>
 <div class="block">Used to describe the priority of the running job.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/JobStatus.html#org.apache.hadoop.mapreduce">JobStatus</a>
 <div class="block">Describes the current status of a job.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Mapper.html#org.apache.hadoop.mapreduce">Mapper</a>
 <div class="block">Maps input key/value pairs to a set of intermediate key/value pairs.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/OutputCommitter.html#org.apache.hadoop.mapreduce">OutputCommitter</a>
 <div class="block"><code>OutputCommitter</code> describes the commit of task output for a
  Map-Reduce job.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/OutputFormat.html#org.apache.hadoop.mapreduce">OutputFormat</a>
 <div class="block"><code>OutputFormat</code> describes the output-specification for a
  Map-Reduce job.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Partitioner.html#org.apache.hadoop.mapreduce">Partitioner</a>
 <div class="block">Partitions the key space.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/QueueAclsInfo.html#org.apache.hadoop.mapreduce">QueueAclsInfo</a>
 <div class="block">Class to encapsulate Queue ACLs for a particular
   user.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/QueueInfo.html#org.apache.hadoop.mapreduce">QueueInfo</a>
 <div class="block">Class that contains the information regarding the Job Queues which are
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 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/QueueState.html#org.apache.hadoop.mapreduce">QueueState</a>
 <div class="block">Enum representing queue state</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/RecordReader.html#org.apache.hadoop.mapreduce">RecordReader</a>
 <div class="block">The record reader breaks the data into key/value pairs for input to the
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 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/RecordWriter.html#org.apache.hadoop.mapreduce">RecordWriter</a>
 <div class="block"><code>RecordWriter</code> writes the output &lt;key, value&gt; pairs
  to an output file.</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/Reducer.html#org.apache.hadoop.mapreduce">Reducer</a>
 <div class="block">Reduces a set of intermediate values which share a key to a smaller set of
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 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskAttemptContext.html#org.apache.hadoop.mapreduce">TaskAttemptContext</a>
 <div class="block">The context for task attempts.</div>
 </td>
 </tr>
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 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskAttemptID.html#org.apache.hadoop.mapreduce">TaskAttemptID</a>
 <div class="block">TaskAttemptID represents the immutable and unique identifier for
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskCompletionEvent.html#org.apache.hadoop.mapreduce">TaskCompletionEvent</a>
 <div class="block">This is used to track task completion events on
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 <tr class="altColor">
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 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskID.html#org.apache.hadoop.mapreduce">TaskID</a>
 <div class="block">TaskID represents the immutable and unique identifier for
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 <tr class="rowColor">
 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskInputOutputContext.html#org.apache.hadoop.mapreduce">TaskInputOutputContext</a>
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 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskTrackerInfo.html#org.apache.hadoop.mapreduce">TaskTrackerInfo</a>
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 <td class="colOne"><a href="../../../../org/apache/hadoop/mapreduce/class-use/TaskType.html#org.apache.hadoop.mapreduce">TaskType</a>
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 <tr>
 <th class="colOne" scope="col">Class and Description</th>
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