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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase.backup.mapreduce;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import java.io.IOException;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.conf.Configured;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.fs.Path;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.hadoop.hbase.Cell;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.apache.hadoop.hbase.CellUtil;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.apache.hadoop.hbase.HBaseConfiguration;</span> |
| <span class="source-line-no">027</span><span id="line-27">import org.apache.hadoop.hbase.PrivateCellUtil;</span> |
| <span class="source-line-no">028</span><span id="line-28">import org.apache.hadoop.hbase.TableName;</span> |
| <span class="source-line-no">029</span><span id="line-29">import org.apache.hadoop.hbase.client.Connection;</span> |
| <span class="source-line-no">030</span><span id="line-30">import org.apache.hadoop.hbase.client.ConnectionFactory;</span> |
| <span class="source-line-no">031</span><span id="line-31">import org.apache.hadoop.hbase.client.RegionLocator;</span> |
| <span class="source-line-no">032</span><span id="line-32">import org.apache.hadoop.hbase.client.Table;</span> |
| <span class="source-line-no">033</span><span id="line-33">import org.apache.hadoop.hbase.io.ImmutableBytesWritable;</span> |
| <span class="source-line-no">034</span><span id="line-34">import org.apache.hadoop.hbase.mapreduce.CellSortReducer;</span> |
| <span class="source-line-no">035</span><span id="line-35">import org.apache.hadoop.hbase.mapreduce.HFileInputFormat;</span> |
| <span class="source-line-no">036</span><span id="line-36">import org.apache.hadoop.hbase.mapreduce.HFileOutputFormat2;</span> |
| <span class="source-line-no">037</span><span id="line-37">import org.apache.hadoop.hbase.mapreduce.TableMapReduceUtil;</span> |
| <span class="source-line-no">038</span><span id="line-38">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">039</span><span id="line-39">import org.apache.hadoop.hbase.util.MapReduceExtendedCell;</span> |
| <span class="source-line-no">040</span><span id="line-40">import org.apache.hadoop.io.NullWritable;</span> |
| <span class="source-line-no">041</span><span id="line-41">import org.apache.hadoop.mapreduce.Job;</span> |
| <span class="source-line-no">042</span><span id="line-42">import org.apache.hadoop.mapreduce.Mapper;</span> |
| <span class="source-line-no">043</span><span id="line-43">import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;</span> |
| <span class="source-line-no">044</span><span id="line-44">import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;</span> |
| <span class="source-line-no">045</span><span id="line-45">import org.apache.hadoop.util.Tool;</span> |
| <span class="source-line-no">046</span><span id="line-46">import org.apache.hadoop.util.ToolRunner;</span> |
| <span class="source-line-no">047</span><span id="line-47">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">048</span><span id="line-48">import org.slf4j.Logger;</span> |
| <span class="source-line-no">049</span><span id="line-49">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">050</span><span id="line-50"></span> |
| <span class="source-line-no">051</span><span id="line-51">/**</span> |
| <span class="source-line-no">052</span><span id="line-52"> * A tool to split HFiles into new region boundaries as a MapReduce job. The tool generates HFiles</span> |
| <span class="source-line-no">053</span><span id="line-53"> * for later bulk importing.</span> |
| <span class="source-line-no">054</span><span id="line-54"> */</span> |
| <span class="source-line-no">055</span><span id="line-55">@InterfaceAudience.Private</span> |
| <span class="source-line-no">056</span><span id="line-56">public class MapReduceHFileSplitterJob extends Configured implements Tool {</span> |
| <span class="source-line-no">057</span><span id="line-57"> private static final Logger LOG = LoggerFactory.getLogger(MapReduceHFileSplitterJob.class);</span> |
| <span class="source-line-no">058</span><span id="line-58"> final static String NAME = "HFileSplitterJob";</span> |
| <span class="source-line-no">059</span><span id="line-59"> public final static String BULK_OUTPUT_CONF_KEY = "hfile.bulk.output";</span> |
| <span class="source-line-no">060</span><span id="line-60"> public final static String TABLES_KEY = "hfile.input.tables";</span> |
| <span class="source-line-no">061</span><span id="line-61"> public final static String TABLE_MAP_KEY = "hfile.input.tablesmap";</span> |
| <span class="source-line-no">062</span><span id="line-62"> private final static String JOB_NAME_CONF_KEY = "mapreduce.job.name";</span> |
| <span class="source-line-no">063</span><span id="line-63"></span> |
| <span class="source-line-no">064</span><span id="line-64"> public MapReduceHFileSplitterJob() {</span> |
| <span class="source-line-no">065</span><span id="line-65"> }</span> |
| <span class="source-line-no">066</span><span id="line-66"></span> |
| <span class="source-line-no">067</span><span id="line-67"> protected MapReduceHFileSplitterJob(final Configuration c) {</span> |
| <span class="source-line-no">068</span><span id="line-68"> super(c);</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> /**</span> |
| <span class="source-line-no">072</span><span id="line-72"> * A mapper that just writes out cells. This one can be used together with {@link CellSortReducer}</span> |
| <span class="source-line-no">073</span><span id="line-73"> */</span> |
| <span class="source-line-no">074</span><span id="line-74"> static class HFileCellMapper extends Mapper<NullWritable, Cell, ImmutableBytesWritable, Cell> {</span> |
| <span class="source-line-no">075</span><span id="line-75"></span> |
| <span class="source-line-no">076</span><span id="line-76"> @Override</span> |
| <span class="source-line-no">077</span><span id="line-77"> public void map(NullWritable key, Cell value, Context context)</span> |
| <span class="source-line-no">078</span><span id="line-78"> throws IOException, InterruptedException {</span> |
| <span class="source-line-no">079</span><span id="line-79"> context.write(new ImmutableBytesWritable(CellUtil.cloneRow(value)),</span> |
| <span class="source-line-no">080</span><span id="line-80"> new MapReduceExtendedCell(PrivateCellUtil.ensureExtendedCell(value)));</span> |
| <span class="source-line-no">081</span><span id="line-81"> }</span> |
| <span class="source-line-no">082</span><span id="line-82"></span> |
| <span class="source-line-no">083</span><span id="line-83"> @Override</span> |
| <span class="source-line-no">084</span><span id="line-84"> public void setup(Context context) throws IOException {</span> |
| <span class="source-line-no">085</span><span id="line-85"> // do nothing</span> |
| <span class="source-line-no">086</span><span id="line-86"> }</span> |
| <span class="source-line-no">087</span><span id="line-87"> }</span> |
| <span class="source-line-no">088</span><span id="line-88"></span> |
| <span class="source-line-no">089</span><span id="line-89"> /**</span> |
| <span class="source-line-no">090</span><span id="line-90"> * Sets up the actual job.</span> |
| <span class="source-line-no">091</span><span id="line-91"> * @param args The command line parameters.</span> |
| <span class="source-line-no">092</span><span id="line-92"> * @return The newly created job.</span> |
| <span class="source-line-no">093</span><span id="line-93"> * @throws IOException When setting up the job fails.</span> |
| <span class="source-line-no">094</span><span id="line-94"> */</span> |
| <span class="source-line-no">095</span><span id="line-95"> public Job createSubmittableJob(String[] args) throws IOException {</span> |
| <span class="source-line-no">096</span><span id="line-96"> Configuration conf = getConf();</span> |
| <span class="source-line-no">097</span><span id="line-97"> String inputDirs = args[0];</span> |
| <span class="source-line-no">098</span><span id="line-98"> String tabName = args[1];</span> |
| <span class="source-line-no">099</span><span id="line-99"> conf.setStrings(TABLES_KEY, tabName);</span> |
| <span class="source-line-no">100</span><span id="line-100"> conf.set(FileInputFormat.INPUT_DIR, inputDirs);</span> |
| <span class="source-line-no">101</span><span id="line-101"> Job job = Job.getInstance(conf,</span> |
| <span class="source-line-no">102</span><span id="line-102"> conf.get(JOB_NAME_CONF_KEY, NAME + "_" + EnvironmentEdgeManager.currentTime()));</span> |
| <span class="source-line-no">103</span><span id="line-103"> // MapReduceHFileSplitter needs ExtendedCellSerialization so that sequenceId can be propagated</span> |
| <span class="source-line-no">104</span><span id="line-104"> // when sorting cells in CellSortReducer</span> |
| <span class="source-line-no">105</span><span id="line-105"> job.getConfiguration().setBoolean(HFileOutputFormat2.EXTENDED_CELL_SERIALIZATION_ENABLED_KEY,</span> |
| <span class="source-line-no">106</span><span id="line-106"> true);</span> |
| <span class="source-line-no">107</span><span id="line-107"> job.setJarByClass(MapReduceHFileSplitterJob.class);</span> |
| <span class="source-line-no">108</span><span id="line-108"> job.setInputFormatClass(HFileInputFormat.class);</span> |
| <span class="source-line-no">109</span><span id="line-109"> job.setMapOutputKeyClass(ImmutableBytesWritable.class);</span> |
| <span class="source-line-no">110</span><span id="line-110"> String hfileOutPath = conf.get(BULK_OUTPUT_CONF_KEY);</span> |
| <span class="source-line-no">111</span><span id="line-111"> if (hfileOutPath != null) {</span> |
| <span class="source-line-no">112</span><span id="line-112"> LOG.debug("add incremental job :" + hfileOutPath + " from " + inputDirs);</span> |
| <span class="source-line-no">113</span><span id="line-113"> TableName tableName = TableName.valueOf(tabName);</span> |
| <span class="source-line-no">114</span><span id="line-114"> job.setMapperClass(HFileCellMapper.class);</span> |
| <span class="source-line-no">115</span><span id="line-115"> job.setReducerClass(CellSortReducer.class);</span> |
| <span class="source-line-no">116</span><span id="line-116"> Path outputDir = new Path(hfileOutPath);</span> |
| <span class="source-line-no">117</span><span id="line-117"> FileOutputFormat.setOutputPath(job, outputDir);</span> |
| <span class="source-line-no">118</span><span id="line-118"> job.setMapOutputValueClass(MapReduceExtendedCell.class);</span> |
| <span class="source-line-no">119</span><span id="line-119"> try (Connection conn = ConnectionFactory.createConnection(conf);</span> |
| <span class="source-line-no">120</span><span id="line-120"> Table table = conn.getTable(tableName);</span> |
| <span class="source-line-no">121</span><span id="line-121"> RegionLocator regionLocator = conn.getRegionLocator(tableName)) {</span> |
| <span class="source-line-no">122</span><span id="line-122"> HFileOutputFormat2.configureIncrementalLoad(job, table.getDescriptor(), regionLocator);</span> |
| <span class="source-line-no">123</span><span id="line-123"> }</span> |
| <span class="source-line-no">124</span><span id="line-124"> LOG.debug("success configuring load incremental job");</span> |
| <span class="source-line-no">125</span><span id="line-125"></span> |
| <span class="source-line-no">126</span><span id="line-126"> TableMapReduceUtil.addDependencyJarsForClasses(job.getConfiguration(),</span> |
| <span class="source-line-no">127</span><span id="line-127"> org.apache.hbase.thirdparty.com.google.common.base.Preconditions.class);</span> |
| <span class="source-line-no">128</span><span id="line-128"> } else {</span> |
| <span class="source-line-no">129</span><span id="line-129"> throw new IOException("No bulk output directory specified");</span> |
| <span class="source-line-no">130</span><span id="line-130"> }</span> |
| <span class="source-line-no">131</span><span id="line-131"> return job;</span> |
| <span class="source-line-no">132</span><span id="line-132"> }</span> |
| <span class="source-line-no">133</span><span id="line-133"></span> |
| <span class="source-line-no">134</span><span id="line-134"> /**</span> |
| <span class="source-line-no">135</span><span id="line-135"> * Print usage</span> |
| <span class="source-line-no">136</span><span id="line-136"> * @param errorMsg Error message. Can be null.</span> |
| <span class="source-line-no">137</span><span id="line-137"> */</span> |
| <span class="source-line-no">138</span><span id="line-138"> private void usage(final String errorMsg) {</span> |
| <span class="source-line-no">139</span><span id="line-139"> if (errorMsg != null && errorMsg.length() > 0) {</span> |
| <span class="source-line-no">140</span><span id="line-140"> System.err.println("ERROR: " + errorMsg);</span> |
| <span class="source-line-no">141</span><span id="line-141"> }</span> |
| <span class="source-line-no">142</span><span id="line-142"> System.err.println("Usage: " + NAME + " [options] <HFile inputdir(s)> <table>");</span> |
| <span class="source-line-no">143</span><span id="line-143"> System.err.println("Read all HFile's for <table> and split them to <table> region boundaries.");</span> |
| <span class="source-line-no">144</span><span id="line-144"> System.err.println("<table> table to load.\n");</span> |
| <span class="source-line-no">145</span><span id="line-145"> System.err.println("To generate HFiles for a bulk data load, pass the option:");</span> |
| <span class="source-line-no">146</span><span id="line-146"> System.err.println(" -D" + BULK_OUTPUT_CONF_KEY + "=/path/for/output");</span> |
| <span class="source-line-no">147</span><span id="line-147"> System.err.println("Other options:");</span> |
| <span class="source-line-no">148</span><span id="line-148"> System.err.println(" -D " + JOB_NAME_CONF_KEY</span> |
| <span class="source-line-no">149</span><span id="line-149"> + "=jobName - use the specified mapreduce job name for the HFile splitter");</span> |
| <span class="source-line-no">150</span><span id="line-150"> System.err.println("For performance also consider the following options:\n"</span> |
| <span class="source-line-no">151</span><span id="line-151"> + " -Dmapreduce.map.speculative=false\n" + " -Dmapreduce.reduce.speculative=false");</span> |
| <span class="source-line-no">152</span><span id="line-152"> }</span> |
| <span class="source-line-no">153</span><span id="line-153"></span> |
| <span class="source-line-no">154</span><span id="line-154"> /**</span> |
| <span class="source-line-no">155</span><span id="line-155"> * Main entry point.</span> |
| <span class="source-line-no">156</span><span id="line-156"> * @param args The command line parameters.</span> |
| <span class="source-line-no">157</span><span id="line-157"> * @throws Exception When running the job fails.</span> |
| <span class="source-line-no">158</span><span id="line-158"> */</span> |
| <span class="source-line-no">159</span><span id="line-159"> public static void main(String[] args) throws Exception {</span> |
| <span class="source-line-no">160</span><span id="line-160"> int ret = ToolRunner.run(new MapReduceHFileSplitterJob(HBaseConfiguration.create()), args);</span> |
| <span class="source-line-no">161</span><span id="line-161"> System.exit(ret);</span> |
| <span class="source-line-no">162</span><span id="line-162"> }</span> |
| <span class="source-line-no">163</span><span id="line-163"></span> |
| <span class="source-line-no">164</span><span id="line-164"> @Override</span> |
| <span class="source-line-no">165</span><span id="line-165"> public int run(String[] args) throws Exception {</span> |
| <span class="source-line-no">166</span><span id="line-166"> if (args.length < 2) {</span> |
| <span class="source-line-no">167</span><span id="line-167"> usage("Wrong number of arguments: " + args.length);</span> |
| <span class="source-line-no">168</span><span id="line-168"> return -1;</span> |
| <span class="source-line-no">169</span><span id="line-169"> }</span> |
| <span class="source-line-no">170</span><span id="line-170"> Job job = createSubmittableJob(args);</span> |
| <span class="source-line-no">171</span><span id="line-171"> int result = job.waitForCompletion(true) ? 0 : 1;</span> |
| <span class="source-line-no">172</span><span id="line-172"> return result;</span> |
| <span class="source-line-no">173</span><span id="line-173"> }</span> |
| <span class="source-line-no">174</span><span id="line-174">}</span> |
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| </div> |
| </main> |
| </body> |
| </html> |
