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From git-site-r...@apache.org
Subject [21/51] [partial] hbase-site git commit: Published site at .
Date Sat, 30 Sep 2017 15:13:41 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/d41f56fe/devapidocs/src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html b/devapidocs/src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html
index 1949f0d..3e3acbe 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/mapred/TableMapReduceUtil.html
@@ -41,345 +41,383 @@
 <span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.security.User;<a name="line.33"></a>
 <span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.security.UserProvider;<a name="line.34"></a>
 <span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.security.token.TokenUtil;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.mapred.FileInputFormat;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.apache.hadoop.mapred.InputFormat;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.hadoop.mapred.JobConf;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.mapred.OutputFormat;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.hadoop.mapred.TextInputFormat;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.hadoop.mapred.TextOutputFormat;<a name="line.41"></a>
-<span class="sourceLineNo">042</span><a name="line.42"></a>
-<span class="sourceLineNo">043</span>import java.io.IOException;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import java.util.Collection;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import java.util.Map;<a name="line.45"></a>
-<span class="sourceLineNo">046</span><a name="line.46"></a>
-<span class="sourceLineNo">047</span>/**<a name="line.47"></a>
-<span class="sourceLineNo">048</span> * Utility for {@link TableMap} and {@link TableReduce}<a name="line.48"></a>
-<span class="sourceLineNo">049</span> */<a name="line.49"></a>
-<span class="sourceLineNo">050</span>@InterfaceAudience.Public<a name="line.50"></a>
-<span class="sourceLineNo">051</span>@SuppressWarnings({ "rawtypes", "unchecked" })<a name="line.51"></a>
-<span class="sourceLineNo">052</span>public class TableMapReduceUtil {<a name="line.52"></a>
-<span class="sourceLineNo">053</span><a name="line.53"></a>
-<span class="sourceLineNo">054</span>  /**<a name="line.54"></a>
-<span class="sourceLineNo">055</span>   * Use this before submitting a TableMap job. It will<a name="line.55"></a>
-<span class="sourceLineNo">056</span>   * appropriately set up the JobConf.<a name="line.56"></a>
-<span class="sourceLineNo">057</span>   *<a name="line.57"></a>
-<span class="sourceLineNo">058</span>   * @param table  The table name to read from.<a name="line.58"></a>
-<span class="sourceLineNo">059</span>   * @param columns  The columns to scan.<a name="line.59"></a>
-<span class="sourceLineNo">060</span>   * @param mapper  The mapper class to use.<a name="line.60"></a>
-<span class="sourceLineNo">061</span>   * @param outputKeyClass  The class of the output key.<a name="line.61"></a>
-<span class="sourceLineNo">062</span>   * @param outputValueClass  The class of the output value.<a name="line.62"></a>
-<span class="sourceLineNo">063</span>   * @param job  The current job configuration to adjust.<a name="line.63"></a>
-<span class="sourceLineNo">064</span>   */<a name="line.64"></a>
-<span class="sourceLineNo">065</span>  public static void initTableMapJob(String table, String columns,<a name="line.65"></a>
-<span class="sourceLineNo">066</span>    Class&lt;? extends TableMap&gt; mapper,<a name="line.66"></a>
-<span class="sourceLineNo">067</span>    Class&lt;?&gt; outputKeyClass,<a name="line.67"></a>
-<span class="sourceLineNo">068</span>    Class&lt;?&gt; outputValueClass, JobConf job) {<a name="line.68"></a>
-<span class="sourceLineNo">069</span>    initTableMapJob(table, columns, mapper, outputKeyClass, outputValueClass, job,<a name="line.69"></a>
-<span class="sourceLineNo">070</span>      true, TableInputFormat.class);<a name="line.70"></a>
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-<span class="sourceLineNo">072</span><a name="line.72"></a>
-<span class="sourceLineNo">073</span>  public static void initTableMapJob(String table, String columns,<a name="line.73"></a>
-<span class="sourceLineNo">074</span>    Class&lt;? extends TableMap&gt; mapper,<a name="line.74"></a>
-<span class="sourceLineNo">075</span>    Class&lt;?&gt; outputKeyClass,<a name="line.75"></a>
-<span class="sourceLineNo">076</span>    Class&lt;?&gt; outputValueClass, JobConf job, boolean addDependencyJars) {<a name="line.76"></a>
-<span class="sourceLineNo">077</span>    initTableMapJob(table, columns, mapper, outputKeyClass, outputValueClass, job,<a name="line.77"></a>
-<span class="sourceLineNo">078</span>      addDependencyJars, TableInputFormat.class);<a name="line.78"></a>
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-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span>  /**<a name="line.81"></a>
-<span class="sourceLineNo">082</span>   * Use this before submitting a TableMap job. It will<a name="line.82"></a>
-<span class="sourceLineNo">083</span>   * appropriately set up the JobConf.<a name="line.83"></a>
-<span class="sourceLineNo">084</span>   *<a name="line.84"></a>
-<span class="sourceLineNo">085</span>   * @param table  The table name to read from.<a name="line.85"></a>
-<span class="sourceLineNo">086</span>   * @param columns  The columns to scan.<a name="line.86"></a>
-<span class="sourceLineNo">087</span>   * @param mapper  The mapper class to use.<a name="line.87"></a>
-<span class="sourceLineNo">088</span>   * @param outputKeyClass  The class of the output key.<a name="line.88"></a>
-<span class="sourceLineNo">089</span>   * @param outputValueClass  The class of the output value.<a name="line.89"></a>
-<span class="sourceLineNo">090</span>   * @param job  The current job configuration to adjust.<a name="line.90"></a>
-<span class="sourceLineNo">091</span>   * @param addDependencyJars upload HBase jars and jars for any of the configured<a name="line.91"></a>
-<span class="sourceLineNo">092</span>   *           job classes via the distributed cache (tmpjars).<a name="line.92"></a>
-<span class="sourceLineNo">093</span>   */<a name="line.93"></a>
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-<span class="sourceLineNo">095</span>    Class&lt;? extends TableMap&gt; mapper,<a name="line.95"></a>
-<span class="sourceLineNo">096</span>    Class&lt;?&gt; outputKeyClass,<a name="line.96"></a>
-<span class="sourceLineNo">097</span>    Class&lt;?&gt; outputValueClass, JobConf job, boolean addDependencyJars,<a name="line.97"></a>
-<span class="sourceLineNo">098</span>    Class&lt;? extends InputFormat&gt; inputFormat) {<a name="line.98"></a>
-<span class="sourceLineNo">099</span><a name="line.99"></a>
-<span class="sourceLineNo">100</span>    job.setInputFormat(inputFormat);<a name="line.100"></a>
-<span class="sourceLineNo">101</span>    job.setMapOutputValueClass(outputValueClass);<a name="line.101"></a>
-<span class="sourceLineNo">102</span>    job.setMapOutputKeyClass(outputKeyClass);<a name="line.102"></a>
-<span class="sourceLineNo">103</span>    job.setMapperClass(mapper);<a name="line.103"></a>
-<span class="sourceLineNo">104</span>    job.setStrings("io.serializations", job.get("io.serializations"),<a name="line.104"></a>
-<span class="sourceLineNo">105</span>        MutationSerialization.class.getName(), ResultSerialization.class.getName());<a name="line.105"></a>
-<span class="sourceLineNo">106</span>    FileInputFormat.addInputPaths(job, table);<a name="line.106"></a>
-<span class="sourceLineNo">107</span>    job.set(TableInputFormat.COLUMN_LIST, columns);<a name="line.107"></a>
-<span class="sourceLineNo">108</span>    if (addDependencyJars) {<a name="line.108"></a>
-<span class="sourceLineNo">109</span>      try {<a name="line.109"></a>
-<span class="sourceLineNo">110</span>        addDependencyJars(job);<a name="line.110"></a>
-<span class="sourceLineNo">111</span>      } catch (IOException e) {<a name="line.111"></a>
-<span class="sourceLineNo">112</span>        e.printStackTrace();<a name="line.112"></a>
-<span class="sourceLineNo">113</span>      }<a name="line.113"></a>
-<span class="sourceLineNo">114</span>    }<a name="line.114"></a>
-<span class="sourceLineNo">115</span>    try {<a name="line.115"></a>
-<span class="sourceLineNo">116</span>      initCredentials(job);<a name="line.116"></a>
-<span class="sourceLineNo">117</span>    } catch (IOException ioe) {<a name="line.117"></a>
-<span class="sourceLineNo">118</span>      // just spit out the stack trace?  really?<a name="line.118"></a>
-<span class="sourceLineNo">119</span>      ioe.printStackTrace();<a name="line.119"></a>
-<span class="sourceLineNo">120</span>    }<a name="line.120"></a>
-<span class="sourceLineNo">121</span>  }<a name="line.121"></a>
-<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span>  /**<a name="line.123"></a>
-<span class="sourceLineNo">124</span>   * Sets up the job for reading from one or more multiple table snapshots, with one or more scans<a name="line.124"></a>
-<span class="sourceLineNo">125</span>   * per snapshot.<a name="line.125"></a>
-<span class="sourceLineNo">126</span>   * It bypasses hbase servers and read directly from snapshot files.<a name="line.126"></a>
-<span class="sourceLineNo">127</span>   *<a name="line.127"></a>
-<span class="sourceLineNo">128</span>   * @param snapshotScans     map of snapshot name to scans on that snapshot.<a name="line.128"></a>
-<span class="sourceLineNo">129</span>   * @param mapper            The mapper class to use.<a name="line.129"></a>
-<span class="sourceLineNo">130</span>   * @param outputKeyClass    The class of the output key.<a name="line.130"></a>
-<span class="sourceLineNo">131</span>   * @param outputValueClass  The class of the output value.<a name="line.131"></a>
-<span class="sourceLineNo">132</span>   * @param job               The current job to adjust.  Make sure the passed job is<a name="line.132"></a>
-<span class="sourceLineNo">133</span>   *                          carrying all necessary HBase configuration.<a name="line.133"></a>
-<span class="sourceLineNo">134</span>   * @param addDependencyJars upload HBase jars and jars for any of the configured<a name="line.134"></a>
-<span class="sourceLineNo">135</span>   *                          job classes via the distributed cache (tmpjars).<a name="line.135"></a>
-<span class="sourceLineNo">136</span>   */<a name="line.136"></a>
-<span class="sourceLineNo">137</span>  public static void initMultiTableSnapshotMapperJob(Map&lt;String, Collection&lt;Scan&gt;&gt; snapshotScans,<a name="line.137"></a>
-<span class="sourceLineNo">138</span>      Class&lt;? extends TableMap&gt; mapper, Class&lt;?&gt; outputKeyClass, Class&lt;?&gt; outputValueClass,<a name="line.138"></a>
-<span class="sourceLineNo">139</span>      JobConf job, boolean addDependencyJars, Path tmpRestoreDir) throws IOException {<a name="line.139"></a>
-<span class="sourceLineNo">140</span>    MultiTableSnapshotInputFormat.setInput(job, snapshotScans, tmpRestoreDir);<a name="line.140"></a>
-<span class="sourceLineNo">141</span><a name="line.141"></a>
-<span class="sourceLineNo">142</span>    job.setInputFormat(MultiTableSnapshotInputFormat.class);<a name="line.142"></a>
-<span class="sourceLineNo">143</span>    if (outputValueClass != null) {<a name="line.143"></a>
-<span class="sourceLineNo">144</span>      job.setMapOutputValueClass(outputValueClass);<a name="line.144"></a>
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-<span class="sourceLineNo">154</span>    org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil.resetCacheConfig(job);<a name="line.154"></a>
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-<span class="sourceLineNo">156</span><a name="line.156"></a>
-<span class="sourceLineNo">157</span>  /**<a name="line.157"></a>
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-<span class="sourceLineNo">159</span>   * and read directly from snapshot files.<a name="line.159"></a>
-<span class="sourceLineNo">160</span>   *<a name="line.160"></a>
-<span class="sourceLineNo">161</span>   * @param snapshotName The name of the snapshot (of a table) to read from.<a name="line.161"></a>
-<span class="sourceLineNo">162</span>   * @param columns  The columns to scan.<a name="line.162"></a>
-<span class="sourceLineNo">163</span>   * @param mapper  The mapper class to use.<a name="line.163"></a>
-<span class="sourceLineNo">164</span>   * @param outputKeyClass  The class of the output key.<a name="line.164"></a>
-<span class="sourceLineNo">165</span>   * @param outputValueClass  The class of the output value.<a name="line.165"></a>
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-<span class="sourceLineNo">167</span>   * carrying all necessary HBase configuration.<a name="line.167"></a>
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-<span class="sourceLineNo">169</span>   *           job classes via the distributed cache (tmpjars).<a name="line.169"></a>
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-<span class="sourceLineNo">172</span>   * After the job is finished, restore directory can be deleted.<a name="line.172"></a>
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-<span class="sourceLineNo">187</span><a name="line.187"></a>
-<span class="sourceLineNo">188</span>  /**<a name="line.188"></a>
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-<span class="sourceLineNo">190</span>   * appropriately set up the JobConf.<a name="line.190"></a>
-<span class="sourceLineNo">191</span>   *<a name="line.191"></a>
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-<span class="sourceLineNo">206</span>   *<a name="line.206"></a>
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+<span class="sourceLineNo">119</span>      // just spit out the stack trace?  really?<a name="line.119"></a>
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+<span class="sourceLineNo">377</span>  public static void setNumMapTasks(String table, JobConf job)<a name="line.377"></a>
+<span class="sourceLineNo">378</span>  throws IOException {<a name="line.378"></a>
+<span class="sourceLineNo">379</span>    job.setNumMapTasks(MetaTableAccessor.getRegionCount(HBaseConfiguration.create(job),<a name="line.379"></a>
+<span class="sourceLineNo">380</span>      TableName.valueOf(table)));<a name="line.380"></a>
+<span class="sourceLineNo">381</span>  }<a name="line.381"></a>
+<span class="sourceLineNo">382</span><a name="line.382"></a>
+<span class="sourceLineNo">383</span>  /**<a name="line.383"></a>
+<span class="sourceLineNo">384</span>   * Sets the number of rows to return and cache with each scanner iteration.<a name="line.384"></a>
+<span class="sourceLineNo">385</span>   * Higher caching values will enable faster mapreduce jobs at the expense of<a name="line.385"></a>
+<span class="sourceLineNo">386</span>   * requiring more heap to contain the cached rows.<a name="line.386"></a>
+<span class="sourceLineNo">387</span>   *<a name="line.387"></a>
+<span class="sourceLineNo">388</span>   * @param job The current job configuration to adjust.<a name="line.388"></a>
+<span class="sourceLineNo">389</span>   * @param batchSize The number of rows to return in batch with each scanner<a name="line.389"></a>
+<span class="sourceLineNo">390</span>   * iteration.<a name="line.390"></a>
+<span class="sourceLineNo">391</span>   */<a name="line.391"></a>
+<span class="sourceLineNo">392</span>  public static void setScannerCaching(JobConf job, int batchSize) {<a name="line.392"></a>
+<span class="sourceLineNo">393</span>    job.setInt("hbase.client.scanner.caching", batchSize);<a name="line.393"></a>
+<span class="sourceLineNo">394</span>  }<a name="line.394"></a>
+<span class="sourceLineNo">395</span><a name="line.395"></a>
+<span class="sourceLineNo">396</span>  /**<a name="line.396"></a>
+<span class="sourceLineNo">397</span>   * @see org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil#addDependencyJars(org.apache.hadoop.mapreduce.Job)<a name="line.397"></a>
+<span class="sourceLineNo">398</span>   */<a name="line.398"></a>
+<span class="sourceLineNo">399</span>  public static void addDependencyJars(JobConf job) throws IOException {<a name="line.399"></a>
+<span class="sourceLineNo">400</span>    org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil.addHBaseDependencyJars(job);<a name="line.400"></a>
+<span class="sourceLineNo">401</span>    org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil.addDependencyJarsForClasses(<a name="line.401"></a>
+<span class="sourceLineNo">402</span>      job,<a name="line.402"></a>
+<span class="sourceLineNo">403</span>      job.getMapOutputKeyClass(),<a name="line.403"></a>
+<span class="sourceLineNo">404</span>      job.getMapOutputValueClass(),<a name="line.404"></a>
+<span class="sourceLineNo">405</span>      job.getOutputKeyClass(),<a name="line.405"></a>
+<span class="sourceLineNo">406</span>      job.getOutputValueClass(),<a name="line.406"></a>
+<span class="sourceLineNo">407</span>      job.getPartitionerClass(),<a name="line.407"></a>
+<span class="sourceLineNo">408</span>      job.getClass("mapred.input.format.class", TextInputFormat.class, InputFormat.class),<a name="line.408"></a>
+<span class="sourceLineNo">409</span>      job.getClass("mapred.output.format.class", TextOutputFormat.class, OutputFormat.class),<a name="line.409"></a>
+<span class="sourceLineNo">410</span>      job.getCombinerClass());<a name="line.410"></a>
+<span class="sourceLineNo">411</span>  }<a name="line.411"></a>
+<span class="sourceLineNo">412</span>}<a name="line.412"></a>
 
 
 


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