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| <pre>@InterfaceAudience.Public |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.56">TableMapReduceUtil</a> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Utility for <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred"><code>TableMap</code></a> and <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred"><code>TableReduce</code></a></div> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#LOG">LOG</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#TableMapReduceUtil--">TableMapReduceUtil</a></span>()</code> </td> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
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| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#addDependencyJars-org.apache.hadoop.mapred.JobConf-">addDependencyJars</a></span>(org.apache.hadoop.mapred.JobConf job)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>private static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#getRegionCount-org.apache.hadoop.conf.Configuration-org.apache.hadoop.hbase.TableName-">getRegionCount</a></span>(org.apache.hadoop.conf.Configuration conf, |
| <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initCredentials-org.apache.hadoop.mapred.JobConf-">initCredentials</a></span>(org.apache.hadoop.mapred.JobConf job)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initMultiTableSnapshotMapperJob-java.util.Map-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-org.apache.hadoop.fs.Path-">initMultiTableSnapshotMapperJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a>>> snapshotScans, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars, |
| org.apache.hadoop.fs.Path tmpRestoreDir)</code> |
| <div class="block">Sets up the job for reading from one or more multiple table snapshots, with one or more scans |
| per snapshot.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-">initTableMapJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job)</code> |
| <div class="block">Use this before submitting a TableMap job.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-">initTableMapJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-java.lang.Class-">initTableMapJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends org.apache.hadoop.mapred.InputFormat> inputFormat)</code> |
| <div class="block">Use this before submitting a TableMap job.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableReduceJob-java.lang.String-java.lang.Class-org.apache.hadoop.mapred.JobConf-">initTableReduceJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred">TableReduce</a>> reducer, |
| org.apache.hadoop.mapred.JobConf job)</code> |
| <div class="block">Use this before submitting a TableReduce job.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableReduceJob-java.lang.String-java.lang.Class-org.apache.hadoop.mapred.JobConf-java.lang.Class-">initTableReduceJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred">TableReduce</a>> reducer, |
| org.apache.hadoop.mapred.JobConf job, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> partitioner)</code> |
| <div class="block">Use this before submitting a TableReduce job.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableReduceJob-java.lang.String-java.lang.Class-org.apache.hadoop.mapred.JobConf-java.lang.Class-boolean-">initTableReduceJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred">TableReduce</a>> reducer, |
| org.apache.hadoop.mapred.JobConf job, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> partitioner, |
| boolean addDependencyJars)</code> |
| <div class="block">Use this before submitting a TableReduce job.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableSnapshotMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-org.apache.hadoop.fs.Path-">initTableSnapshotMapJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> snapshotName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars, |
| org.apache.hadoop.fs.Path tmpRestoreDir)</code> |
| <div class="block">Sets up the job for reading from a table snapshot.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#initTableSnapshotMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-org.apache.hadoop.fs.Path-org.apache.hadoop.hbase.util.RegionSplitter.SplitAlgorithm-int-">initTableSnapshotMapJob</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> snapshotName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf jobConf, |
| boolean addDependencyJars, |
| org.apache.hadoop.fs.Path tmpRestoreDir, |
| <a href="../../../../../org/apache/hadoop/hbase/util/RegionSplitter.SplitAlgorithm.html" title="interface in org.apache.hadoop.hbase.util">RegionSplitter.SplitAlgorithm</a> splitAlgo, |
| int numSplitsPerRegion)</code> |
| <div class="block">Sets up the job for reading from a table snapshot.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#limitNumMapTasks-java.lang.String-org.apache.hadoop.mapred.JobConf-">limitNumMapTasks</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job)</code> |
| <div class="block">Ensures that the given number of map tasks for the given job |
| configuration does not exceed the number of regions for the given table.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#limitNumReduceTasks-java.lang.String-org.apache.hadoop.mapred.JobConf-">limitNumReduceTasks</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job)</code> |
| <div class="block">Ensures that the given number of reduce tasks for the given job |
| configuration does not exceed the number of regions for the given table.</div> |
| </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#setNumMapTasks-java.lang.String-org.apache.hadoop.mapred.JobConf-">setNumMapTasks</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job)</code> |
| <div class="block">Sets the number of map tasks for the given job configuration to the |
| number of regions the given table has.</div> |
| </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#setNumReduceTasks-java.lang.String-org.apache.hadoop.mapred.JobConf-">setNumReduceTasks</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job)</code> |
| <div class="block">Sets the number of reduce tasks for the given job configuration to the |
| number of regions the given table has.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#setScannerCaching-org.apache.hadoop.mapred.JobConf-int-">setScannerCaching</a></span>(org.apache.hadoop.mapred.JobConf job, |
| int batchSize)</code> |
| <div class="block">Sets the number of rows to return and cache with each scanner iteration.</div> |
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| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job)</pre> |
| <div class="block">Use this before submitting a TableMap job. It will |
| appropriately set up the JobConf.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The table name to read from.</dd> |
| <dd><code>columns</code> - The columns to scan.</dd> |
| <dd><code>mapper</code> - The mapper class to use.</dd> |
| <dd><code>outputKeyClass</code> - The class of the output key.</dd> |
| <dd><code>outputValueClass</code> - The class of the output value.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>initTableMapJob</h4> |
| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.78">initTableMapJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars)</pre> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.99">initTableMapJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends org.apache.hadoop.mapred.InputFormat> inputFormat)</pre> |
| <div class="block">Use this before submitting a TableMap job. It will |
| appropriately set up the JobConf.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The table name to read from.</dd> |
| <dd><code>columns</code> - The columns to scan.</dd> |
| <dd><code>mapper</code> - The mapper class to use.</dd> |
| <dd><code>outputKeyClass</code> - The class of the output key.</dd> |
| <dd><code>outputValueClass</code> - The class of the output value.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dd><code>addDependencyJars</code> - upload HBase jars and jars for any of the configured |
| job classes via the distributed cache (tmpjars).</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="initMultiTableSnapshotMapperJob-java.util.Map-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-org.apache.hadoop.fs.Path-"> |
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| <h4>initMultiTableSnapshotMapperJob</h4> |
| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.142">initMultiTableSnapshotMapperJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a>>> snapshotScans, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars, |
| org.apache.hadoop.fs.Path tmpRestoreDir) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Sets up the job for reading from one or more multiple table snapshots, with one or more scans |
| per snapshot. |
| It bypasses hbase servers and read directly from snapshot files.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>snapshotScans</code> - map of snapshot name to scans on that snapshot.</dd> |
| <dd><code>mapper</code> - The mapper class to use.</dd> |
| <dd><code>outputKeyClass</code> - The class of the output key.</dd> |
| <dd><code>outputValueClass</code> - The class of the output value.</dd> |
| <dd><code>job</code> - The current job to adjust. Make sure the passed job is |
| carrying all necessary HBase configuration.</dd> |
| <dd><code>addDependencyJars</code> - upload HBase jars and jars for any of the configured |
| job classes via the distributed cache (tmpjars).</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="initTableSnapshotMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-org.apache.hadoop.fs.Path-"> |
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| <h4>initTableSnapshotMapJob</h4> |
| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.181">initTableSnapshotMapJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> snapshotName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf job, |
| boolean addDependencyJars, |
| org.apache.hadoop.fs.Path tmpRestoreDir) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Sets up the job for reading from a table snapshot. It bypasses hbase servers |
| and read directly from snapshot files.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>snapshotName</code> - The name of the snapshot (of a table) to read from.</dd> |
| <dd><code>columns</code> - The columns to scan.</dd> |
| <dd><code>mapper</code> - The mapper class to use.</dd> |
| <dd><code>outputKeyClass</code> - The class of the output key.</dd> |
| <dd><code>outputValueClass</code> - The class of the output value.</dd> |
| <dd><code>job</code> - The current job to adjust. Make sure the passed job is |
| carrying all necessary HBase configuration.</dd> |
| <dd><code>addDependencyJars</code> - upload HBase jars and jars for any of the configured |
| job classes via the distributed cache (tmpjars).</dd> |
| <dd><code>tmpRestoreDir</code> - a temporary directory to copy the snapshot files into. Current user should |
| have write permissions to this directory, and this should not be a subdirectory of rootdir. |
| After the job is finished, restore directory can be deleted.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When setting up the details fails.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/mapred/TableSnapshotInputFormat.html" title="class in org.apache.hadoop.hbase.mapred"><code>TableSnapshotInputFormat</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="initTableSnapshotMapJob-java.lang.String-java.lang.String-java.lang.Class-java.lang.Class-java.lang.Class-org.apache.hadoop.mapred.JobConf-boolean-org.apache.hadoop.fs.Path-org.apache.hadoop.hbase.util.RegionSplitter.SplitAlgorithm-int-"> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.214">initTableSnapshotMapJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> snapshotName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columns, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableMap.html" title="interface in org.apache.hadoop.hbase.mapred">TableMap</a>> mapper, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputKeyClass, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><?> outputValueClass, |
| org.apache.hadoop.mapred.JobConf jobConf, |
| boolean addDependencyJars, |
| org.apache.hadoop.fs.Path tmpRestoreDir, |
| <a href="../../../../../org/apache/hadoop/hbase/util/RegionSplitter.SplitAlgorithm.html" title="interface in org.apache.hadoop.hbase.util">RegionSplitter.SplitAlgorithm</a> splitAlgo, |
| int numSplitsPerRegion) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Sets up the job for reading from a table snapshot. It bypasses hbase servers |
| and read directly from snapshot files.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>snapshotName</code> - The name of the snapshot (of a table) to read from.</dd> |
| <dd><code>columns</code> - The columns to scan.</dd> |
| <dd><code>mapper</code> - The mapper class to use.</dd> |
| <dd><code>outputKeyClass</code> - The class of the output key.</dd> |
| <dd><code>outputValueClass</code> - The class of the output value.</dd> |
| <dd><code>jobConf</code> - The current job to adjust. Make sure the passed job is |
| carrying all necessary HBase configuration.</dd> |
| <dd><code>addDependencyJars</code> - upload HBase jars and jars for any of the configured |
| job classes via the distributed cache (tmpjars).</dd> |
| <dd><code>tmpRestoreDir</code> - a temporary directory to copy the snapshot files into. Current user should |
| have write permissions to this directory, and this should not be a subdirectory of rootdir. |
| After the job is finished, restore directory can be deleted.</dd> |
| <dd><code>splitAlgo</code> - algorithm to split</dd> |
| <dd><code>numSplitsPerRegion</code> - how many input splits to generate per one region</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When setting up the details fails.</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/mapred/TableSnapshotInputFormat.html" title="class in org.apache.hadoop.hbase.mapred"><code>TableSnapshotInputFormat</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.239">initTableReduceJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred">TableReduce</a>> reducer, |
| org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Use this before submitting a TableReduce job. It will |
| appropriately set up the JobConf.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The output table.</dd> |
| <dd><code>reducer</code> - The reducer class to use.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When determining the region count fails.</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="initTableReduceJob-java.lang.String-java.lang.Class-org.apache.hadoop.mapred.JobConf-java.lang.Class-"> |
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| <h4>initTableReduceJob</h4> |
| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.256">initTableReduceJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred">TableReduce</a>> reducer, |
| org.apache.hadoop.mapred.JobConf job, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> partitioner) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Use this before submitting a TableReduce job. It will |
| appropriately set up the JobConf.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The output table.</dd> |
| <dd><code>reducer</code> - The reducer class to use.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dd><code>partitioner</code> - Partitioner to use. Pass <code>null</code> to use |
| default partitioner.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When determining the region count fails.</dd> |
| </dl> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.275">initTableReduceJob</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a><? extends <a href="../../../../../org/apache/hadoop/hbase/mapred/TableReduce.html" title="interface in org.apache.hadoop.hbase.mapred">TableReduce</a>> reducer, |
| org.apache.hadoop.mapred.JobConf job, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang">Class</a> partitioner, |
| boolean addDependencyJars) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Use this before submitting a TableReduce job. It will |
| appropriately set up the JobConf.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The output table.</dd> |
| <dd><code>reducer</code> - The reducer class to use.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dd><code>partitioner</code> - Partitioner to use. Pass <code>null</code> to use |
| default partitioner.</dd> |
| <dd><code>addDependencyJars</code> - upload HBase jars and jars for any of the configured |
| job classes via the distributed cache (tmpjars).</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When determining the region count fails.</dd> |
| </dl> |
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| <a name="initCredentials-org.apache.hadoop.mapred.JobConf-"> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.300">initCredentials</a>(org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
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| <h4>limitNumReduceTasks</h4> |
| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.333">limitNumReduceTasks</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Ensures that the given number of reduce tasks for the given job |
| configuration does not exceed the number of regions for the given table.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The table to get the region count for.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When retrieving the table details fails.</dd> |
| </dl> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.349">limitNumMapTasks</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Ensures that the given number of map tasks for the given job |
| configuration does not exceed the number of regions for the given table.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The table to get the region count for.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When retrieving the table details fails.</dd> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.364">setNumReduceTasks</a>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> table, |
| org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Sets the number of reduce tasks for the given job configuration to the |
| number of regions the given table has.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The table to get the region count for.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When retrieving the table details fails.</dd> |
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| org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <div class="block">Sets the number of map tasks for the given job configuration to the |
| number of regions the given table has.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>table</code> - The table to get the region count for.</dd> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code> - When retrieving the table details fails.</dd> |
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| int batchSize)</pre> |
| <div class="block">Sets the number of rows to return and cache with each scanner iteration. |
| Higher caching values will enable faster mapreduce jobs at the expense of |
| requiring more heap to contain the cached rows.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>job</code> - The current job configuration to adjust.</dd> |
| <dd><code>batchSize</code> - The number of rows to return in batch with each scanner |
| iteration.</dd> |
| </dl> |
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| <pre>public static void <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.396">addDependencyJars</a>(org.apache.hadoop.mapred.JobConf job) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableMapReduceUtil.html#addDependencyJars-org.apache.hadoop.mapreduce.Job-"><code>TableMapReduceUtil.addDependencyJars(org.apache.hadoop.mapreduce.Job)</code></a></dd> |
| </dl> |
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| <pre>private static int <a href="../../../../../src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html#line.411">getRegionCount</a>(org.apache.hadoop.conf.Configuration conf, |
| <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName) |
| throws <a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd> |
| </dl> |
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