http://git-wip-us.apache.org/repos/asf/hbase-site/blob/387c1112/apidocs/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html ---------------------------------------------------------------------- diff --git a/apidocs/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html b/apidocs/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html index aee36ff..fb99697 100644 --- a/apidocs/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html +++ b/apidocs/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html @@ -18,7 +18,7 @@ catch(err) { } //--> -var methods = {"i0":10,"i1":10,"i2":10,"i3":10,"i4":10,"i5":10,"i6":10,"i7":10,"i8":10,"i9":10,"i10":10,"i11":10,"i12":10}; +var methods = {"i0":10,"i1":10,"i2":10,"i3":10,"i4":10,"i5":10,"i6":10,"i7":10,"i8":10,"i9":10,"i10":10,"i11":10,"i12":10,"i13":10,"i14":10}; var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]}; var altColor = "altColor"; var rowColor = "rowColor"; @@ -119,7 +119,7 @@ var activeTableTab = "activeTableTab"; <hr> <br> <pre>@InterfaceAudience.Public -public abstract class <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.98">TableInputFormatBase</a> +public abstract class <a href="../../../../../src-html/org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#line.109">TableInputFormatBase</a> extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<a href="../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>></pre> <div class="block">A base for <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormat.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableInputFormat</code></a>s. Receives a <a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client"><code>Connection</code></a>, a <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase"><code>TableName</code></a>, an <a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client"><code>Scan</code></a> instance that defines the input columns etc. Subclasses may use @@ -158,7 +158,18 @@ extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/a setScan(scan); } } - </pre></div> + </pre> + + + The number of InputSplits(mappers) match the number of regions in a table by default. + Set "hbase.mapreduce.tableinput.mappers.per.region" to specify how many mappers per region, set + this property will disable autobalance below.\ + Set "hbase.mapreduce.tif.input.autobalance" to enable autobalance, hbase will assign mappers + based on average region size; For regions, whose size larger than average region size may assigned + more mappers, and for smaller one, they may group together to use one mapper. If actual average + region size is too big, like 50G, it is not good to only assign 1 mapper for those large regions. + Use "hbase.mapreduce.tif.ave.regionsize" to set max average region size when enable "autobalanece", + default mas average region size is 8G.</div> </li> </ul> </div> @@ -179,22 +190,20 @@ extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/a </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; title="class or interface in java.lang">String</a></code></td> -<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#INPUT_AUTOBALANCE_MAXSKEWRATIO">INPUT_AUTOBALANCE_MAXSKEWRATIO</a></span></code> -<div class="block">Specify if ratio for data skew in M/R jobs, it goes well with the enabling hbase.mapreduce - .input.autobalance property.</div> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#MAPREDUCE_INPUT_AUTOBALANCE">MAPREDUCE_INPUT_AUTOBALANCE</a></span></code> +<div class="block">Specify if we enable auto-balance to set number of mappers in M/R jobs.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; title="class or interface in java.lang">String</a></code></td> -<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#MAPREDUCE_INPUT_AUTOBALANCE">MAPREDUCE_INPUT_AUTOBALANCE</a></span></code> -<div class="block">Specify if we enable auto-balance for input in M/R jobs.</div> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#MAX_AVERAGE_REGION_SIZE">MAX_AVERAGE_REGION_SIZE</a></span></code> +<div class="block">In auto-balance, we split input by ave region size, if calculated region size is too big, we can set it.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; title="class or interface in java.lang">String</a></code></td> -<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#TABLE_ROW_TEXTKEY">TABLE_ROW_TEXTKEY</a></span></code> -<div class="block">Specify if the row key in table is text (ASCII between 32~126), - default is true.</div> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#NUM_MAPPERS_PER_REGION">NUM_MAPPERS_PER_REGION</a></span></code> +<div class="block">Set the number of Mappers for each region, all regions have same number of Mappers</div> </td> </tr> </table> @@ -230,54 +239,68 @@ extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/a <th class="colLast" scope="col">Method and Description</th> </tr> <tr id="i0" class="altColor"> +<td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true"; title="class or interface in java.util">List</a><org.apache.hadoop.mapreduce.InputSplit></code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#calculateAutoBalancedSplits-java.util.List-long-">calculateAutoBalancedSplits</a></span>(<a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true"; title="class or interface in java.util">List</a><org.apache.hadoop.mapreduce.InputSplit> splits, + long maxAverageRegionSize)</code> +<div class="block">Calculates the number of MapReduce input splits for the map tasks.</div> +</td> +</tr> +<tr id="i1" class="rowColor"> <td class="colFirst"><code>protected void</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#closeTable--">closeTable</a></span>()</code> <div class="block">Close the Table and related objects that were initialized via <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-"><code>initializeTable(Connection, TableName)</code></a>.</div> </td> </tr> -<tr id="i1" class="rowColor"> +<tr id="i2" class="altColor"> +<td class="colFirst"><code>protected <a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true"; title="class or interface in java.util">List</a><org.apache.hadoop.mapreduce.InputSplit></code></td> +<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#createNInputSplitsUniform-org.apache.hadoop.mapreduce.InputSplit-int-">createNInputSplitsUniform</a></span>(org.apache.hadoop.mapreduce.InputSplit split, + int n)</code> +<div class="block">Create n splits for one InputSplit, For now only support uniform distribution</div> +</td> +</tr> +<tr id="i3" class="rowColor"> <td class="colFirst"><code>org.apache.hadoop.mapreduce.RecordReader<<a href="../../../../../org/apache/hadoop/hbase/io/ImmutableBytesWritable.html" title="class in org.apache.hadoop.hbase.io">ImmutableBytesWritable</a>,<a href="../../../../../org/apache/hadoop/hbase/client/Result.html" title="class in org.apache.hadoop.hbase.client">Result</a>></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#createRecordReader-org.apache.hadoop.mapreduce.InputSplit-org.apache.hadoop.mapreduce.TaskAttemptContext-">createRecordReader</a></span>(org.apache.hadoop.mapreduce.InputSplit split, org.apache.hadoop.mapreduce.TaskAttemptContext context)</code> <div class="block">Builds a <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a>.</div> </td> </tr> -<tr id="i2" class="altColor"> +<tr id="i4" class="altColor"> <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client">Admin</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getAdmin--">getAdmin</a></span>()</code> <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/Admin.html" title="interface in org.apache.hadoop.hbase.client"><code>Admin</code></a>.</div> </td> </tr> -<tr id="i3" class="rowColor"> +<tr id="i5" class="rowColor"> <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client">RegionLocator</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getRegionLocator--">getRegionLocator</a></span>()</code> <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/RegionLocator.html" title="interface in org.apache.hadoop.hbase.client"><code>RegionLocator</code></a>.</div> </td> </tr> -<tr id="i4" class="altColor"> +<tr id="i6" class="altColor"> <td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getScan--">getScan</a></span>()</code> <div class="block">Gets the scan defining the actual details like columns etc.</div> </td> </tr> -<tr id="i5" class="rowColor"> +<tr id="i7" class="rowColor"> <td class="colFirst"><code><a href="http://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true"; title="class or interface in java.util">List</a><org.apache.hadoop.mapreduce.InputSplit></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getSplits-org.apache.hadoop.mapreduce.JobContext-">getSplits</a></span>(org.apache.hadoop.mapreduce.JobContext context)</code> <div class="block">Calculates the splits that will serve as input for the map tasks.</div> </td> </tr> -<tr id="i6" class="altColor"> +<tr id="i8" class="altColor"> <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/util/Pair.html" title="class in org.apache.hadoop.hbase.util">Pair</a><byte[][],byte[][]></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getStartEndKeys--">getStartEndKeys</a></span>()</code> </td> </tr> -<tr id="i7" class="rowColor"> +<tr id="i9" class="rowColor"> <td class="colFirst"><code>protected <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client">Table</a></code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#getTable--">getTable</a></span>()</code> <div class="block">Allows subclasses to get the <a href="../../../../../org/apache/hadoop/hbase/client/Table.html" title="interface in org.apache.hadoop.hbase.client"><code>Table</code></a>.</div> </td> </tr> -<tr id="i8" class="altColor"> +<tr id="i10" class="altColor"> <td class="colFirst"><code>protected boolean</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#includeRegionInSplit-byte:A-byte:A-">includeRegionInSplit</a></span>(byte[] startKey, byte[] endKey)</code> @@ -285,26 +308,26 @@ extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/a the regions of a table.</div> </td> </tr> -<tr id="i9" class="rowColor"> +<tr id="i11" class="rowColor"> <td class="colFirst"><code>protected void</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initialize-org.apache.hadoop.mapreduce.JobContext-">initialize</a></span>(org.apache.hadoop.mapreduce.JobContext context)</code> <div class="block">Handle subclass specific set up.</div> </td> </tr> -<tr id="i10" class="altColor"> +<tr id="i12" class="altColor"> <td class="colFirst"><code>protected void</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#initializeTable-org.apache.hadoop.hbase.client.Connection-org.apache.hadoop.hbase.TableName-">initializeTable</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/Connection.html" title="interface in org.apache.hadoop.hbase.client">Connection</a> connection, <a href="../../../../../org/apache/hadoop/hbase/TableName.html" title="class in org.apache.hadoop.hbase">TableName</a> tableName)</code> <div class="block">Allows subclasses to initialize the table information.</div> </td> </tr> -<tr id="i11" class="rowColor"> +<tr id="i13" class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#setScan-org.apache.hadoop.hbase.client.Scan-">setScan</a></span>(<a href="../../../../../org/apache/hadoop/hbase/client/Scan.html" title="class in org.apache.hadoop.hbase.client">Scan</a> scan)</code> <div class="block">Sets the scan defining the actual details like columns etc.</div> </td> </tr> -<tr id="i12" class="altColor"> +<tr id="i14" class="altColor"> <td class="colFirst"><code>protected void</code></td> <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableInputFormatBase.html#setTableRecordReader-org.apache.hadoop.hbase.mapreduce.TableRecordReader-">setTableRecordReader</a></span>(<a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce">TableRecordReader</a> tableRecordReader)</code> <div class="block">Allows subclasses to set the <a href="../../../../../org/apache/hadoop/hbase/mapreduce/TableRecordReader.html" title="class in org.apache.hadoop.hbase.mapreduce"><code>TableRecordReader</code></a>.</div> @@ -338,41 +361,39 @@ extends org.apache.hadoop.mapreduce.InputFormat<<a href="../../../../../org/a <ul class="blockList"> <li class="blockList"> <h4>MAPREDUCE_INPUT_AUTOBALANCE</h4> -<pre>public static final <a href="http://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true"; 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