Example usage for org.apache.hadoop.mapred JobConf setOutputKeyClass

Introduction

In this page you can find the example usage for org.apache.hadoop.mapred JobConf setOutputKeyClass.

Prototype

public void setOutputKeyClass(Class<?> theClass) 

Source Link

Document

Set the key class for the job output data.

Usage

From source file:jobimtext.thesaurus.distributional.hadoop.mapreduce.SimCountsLog.java

License:Apache License

/**
 * The reducer step will sum all float values, i.e. the
 * weight for any (word1,word2) pair sharing a feature.
 *///  www .ja va  2  s.c  om

public static void main(String[] args) throws Exception {

    JobConf conf = HadoopUtil.generateJobConf(args);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(FloatWritable.class);

    conf.setMapperClass(Map.class);
    conf.setCombinerClass(DoubleSumReducer.class);
    conf.setReducerClass(DoubleSumReducer.class);

    conf.setInputFormat(TextInputFormat.class);
    conf.setOutputFormat(TextOutputFormat.class);

    FileInputFormat.setInputPaths(conf, new Path(args[0]));
    FileOutputFormat.setOutputPath(conf, new Path(args[1]));

    /* number of milliseconds before killing a not responding task */
    conf.set("mapred.task.timeout", "600000");

    /* change to 128mb */
    conf.set("dfs.block.size", "134217728");

    /* set the maximum number of task per node */
    int maptasks = 100;

    /* Number of map tasks to deploy on each machine. 0.5 to 2 * (cores/node) */
    conf.set("mapred.tasktracker.map.tasks.maximum", "" + maptasks);
    conf.set("mapred.tasktracker.map", "" + maptasks);
    /* The default number of map tasks per job. Typically set to a prime several
       times greater than number of available hosts. */
    conf.set("mapred.map.tasks", "" + maptasks);

    int reducetasks = 100;

    conf.set("mapred.tasktracker.reduce.tasks.maximum", "" + reducetasks);
    conf.set("mapred.tasktracker.reduce", "" + reducetasks);
    conf.set("mapred.reduce.tasks", "" + reducetasks);

    JobClient.runJob(conf);

}

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From source file:jobimtext.thesaurus.distributional.hadoop.mapreduce.TotalWords.java

License:Apache License

@SuppressWarnings("deprecation")
public static void main(String[] args) throws Exception {

    JobConf conf = HadoopUtil.generateJobConf(args);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);

    conf.setMapperClass(Map.class);
    conf.setCombinerClass(Reduce.class);
    conf.setReducerClass(Reduce.class);

    conf.setInputFormat(TextInputFormat.class);
    conf.setOutputFormat(TextOutputFormat.class);

    FileInputFormat.setInputPaths(conf, new Path(args[0]));
    FileOutputFormat.setOutputPath(conf, new Path(args[1]));

    JobClient.runJob(conf);//w w w .j av a 2s.  c om

}

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From source file:junto.algorithm.parallel.AdsorptionHadoop.java

License:Apache License

public static void main(String[] args) throws Exception {
    Hashtable config = ConfigReader.read_config(args);

    String baseInputFilePat = Defaults.GetValueOrDie(config, "hdfs_input_pattern");
    String baseOutputFilePat = Defaults.GetValueOrDie(config, "hdfs_output_base");
    int numIterations = Integer.parseInt(Defaults.GetValueOrDie(config, "iters"));

    String currInputFilePat = baseInputFilePat;
    String currOutputFilePat = "";
    for (int iter = 1; iter <= numIterations; ++iter) {
        JobConf conf = new JobConf(AdsorptionHadoop.class);
        conf.setJobName("adsorption_hadoop");

        conf.setOutputKeyClass(Text.class);
        conf.setOutputValueClass(Text.class);

        conf.setMapperClass(Map.class);
        // conf.setCombinerClass(Reduce.class);
        conf.setReducerClass(Reduce.class);

        conf.setInputFormat(TextInputFormat.class);
        conf.setOutputFormat(TextOutputFormat.class);

        // hyperparameters
        conf.set("mu1", Defaults.GetValueOrDie(config, "mu1"));
        conf.set("mu2", Defaults.GetValueOrDie(config, "mu2"));
        conf.set("mu3", Defaults.GetValueOrDie(config, "mu3"));
        conf.set("keepTopKLabels", Defaults.GetValueOrDefault((String) config.get("keep_top_k_labels"),
                Integer.toString(Integer.MAX_VALUE)));

        if (iter > 1) {
            // output from last iteration is the input for current iteration
            currInputFilePat = currOutputFilePat + "/*";
        }// w  w  w  . j  a  v  a  2s . c o  m
        FileInputFormat.setInputPaths(conf, new Path(currInputFilePat));

        currOutputFilePat = baseOutputFilePat + "_" + iter;
        FileOutputFormat.setOutputPath(conf, new Path(currOutputFilePat));

        JobClient.runJob(conf);
    }
}

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From source file:junto.algorithm.parallel.LP_ZGL_Hadoop.java

License:Apache License

public static void main(String[] args) throws Exception {
    Hashtable config = ConfigReader.read_config(args);

    String baseInputFilePat = Defaults.GetValueOrDie(config, "hdfs_input_pattern");
    String baseOutputFilePat = Defaults.GetValueOrDie(config, "hdfs_output_base");
    int numIterations = Integer.parseInt(Defaults.GetValueOrDie(config, "iters"));

    String currInputFilePat = baseInputFilePat;
    String currOutputFilePat = "";
    for (int iter = 1; iter <= numIterations; ++iter) {
        JobConf conf = new JobConf(LP_ZGL_Hadoop.class);
        conf.setJobName("lp_zgl_hadoop");

        conf.setOutputKeyClass(Text.class);
        conf.setOutputValueClass(Text.class);

        conf.setMapperClass(LP_ZGL_Map.class);
        // conf.setCombinerClass(LP_ZGL_Reduce.class);
        conf.setReducerClass(LP_ZGL_Reduce.class);

        conf.setInputFormat(TextInputFormat.class);
        conf.setOutputFormat(TextOutputFormat.class);

        // hyperparameters
        conf.set("mu1", Defaults.GetValueOrDie(config, "mu1"));
        conf.set("mu2", Defaults.GetValueOrDie(config, "mu2"));
        conf.set("keepTopKLabels", Defaults.GetValueOrDefault((String) config.get("keep_top_k_labels"),
                Integer.toString(Integer.MAX_VALUE)));

        if (iter > 1) {
            // output from last iteration is the input for current iteration
            currInputFilePat = currOutputFilePat + "/*";
        }/*from  w  ww. ja  va2  s.  c  o  m*/
        FileInputFormat.setInputPaths(conf, new Path(currInputFilePat));

        currOutputFilePat = baseOutputFilePat + "_" + iter;
        FileOutputFormat.setOutputPath(conf, new Path(currOutputFilePat));

        JobClient.runJob(conf);
    }
}

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From source file:junto.algorithm.parallel.MADHadoop.java

License:Apache License

public static void main(String[] args) throws Exception {
    Hashtable config = ConfigReader.read_config(args);

    String baseInputFilePat = Defaults.GetValueOrDie(config, "hdfs_input_pattern");
    String baseOutputFilePat = Defaults.GetValueOrDie(config, "hdfs_output_base");
    int numIterations = Integer.parseInt(Defaults.GetValueOrDie(config, "iters"));
    int numReducers = Defaults.GetValueOrDefault((String) config.get("num_reducers"), 10);

    String currInputFilePat = baseInputFilePat;
    String currOutputFilePat = "";
    for (int iter = 1; iter <= numIterations; ++iter) {
        JobConf conf = new JobConf(MADHadoop.class);
        conf.setJobName("mad_hadoop");

        conf.setOutputKeyClass(Text.class);
        conf.setOutputValueClass(Text.class);

        conf.setMapperClass(MADHadoopMap.class);
        // conf.setCombinerClass(MADHadoopReduce.class);
        conf.setReducerClass(MADHadoopReduce.class);
        conf.setNumReduceTasks(numReducers);

        conf.setInputFormat(TextInputFormat.class);
        conf.setOutputFormat(TextOutputFormat.class);

        // hyperparameters
        conf.set("mu1", Defaults.GetValueOrDie(config, "mu1"));
        conf.set("mu2", Defaults.GetValueOrDie(config, "mu2"));
        conf.set("mu3", Defaults.GetValueOrDie(config, "mu3"));
        conf.set("keepTopKLabels", Defaults.GetValueOrDefault((String) config.get("keep_top_k_labels"),
                Integer.toString(Integer.MAX_VALUE)));

        if (iter > 1) {
            // output from last iteration is the input for current iteration
            currInputFilePat = currOutputFilePat + "/*";
        }// w w  w  .  j a  v  a2  s .  co m
        FileInputFormat.setInputPaths(conf, new Path(currInputFilePat));

        currOutputFilePat = baseOutputFilePat + "_iter_" + iter;
        FileOutputFormat.setOutputPath(conf, new Path(currOutputFilePat));

        JobClient.runJob(conf);
    }
}

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From source file:kafka.etl.impl.SimpleKafkaETLJob.java

License:Apache License

protected JobConf createJobConf() throws Exception {
    JobConf jobConf = KafkaETLJob.createJobConf("SimpleKafakETL", _topic, _props, getClass());

    jobConf.setMapperClass(SimpleKafkaETLMapper.class);
    KafkaETLInputFormat.setInputPaths(jobConf, new Path(_input));

    jobConf.setOutputKeyClass(LongWritable.class);
    jobConf.setOutputValueClass(Text.class);
    jobConf.setOutputFormat(TextOutputFormat.class);
    TextOutputFormat.setCompressOutput(jobConf, false);
    Path output = new Path(_output);
    FileSystem fs = output.getFileSystem(jobConf);
    if (fs.exists(output))
        fs.delete(output);//w ww .  j  a  va2  s  . co m
    TextOutputFormat.setOutputPath(jobConf, output);

    jobConf.setNumReduceTasks(0);
    return jobConf;
}

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From source file:mapreduce.BigramCount.java

License:Apache License

/**
 * Runs this tool./*www  .ja  va  2s. c o m*/
 */
public int run(String[] args) throws Exception {
    if (args.length != 2) {
        printUsage();
        return -1;
    }

    String inputPath = args[0];
    String outputPath = args[1];

    int mapTasks = 1;//Integer.parseInt(args[2]);
    int reduceTasks = 1;//Integer.parseInt(args[3]);

    sLogger.info("Tool: BigramCount");
    sLogger.info(" - input path: " + inputPath);
    sLogger.info(" - output path: " + outputPath);
    sLogger.info(" - number of mappers: " + mapTasks);
    sLogger.info(" - number of reducers: " + reduceTasks);

    JobConf conf = new JobConf(BigramCount.class);
    conf.setJobName("BigramCount");

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(reduceTasks);

    FileInputFormat.setInputPaths(conf, new Path(inputPath));
    FileOutputFormat.setOutputPath(conf, new Path(outputPath));
    FileOutputFormat.setCompressOutput(conf, false);

    /**
     *  Note that these must match the Class arguments given in the mapper 
     */
    conf.setOutputKeyClass(WordPair.class);
    conf.setOutputValueClass(IntWritable.class);

    conf.setMapperClass(MyMapper.class);
    conf.setPartitionerClass(MyPartitioner.class);
    conf.setCombinerClass(MyReducer.class);
    conf.setReducerClass(MyReducer.class);

    // Delete the output directory if it exists already
    Path outputDir = new Path(outputPath);
    FileSystem.get(outputDir.toUri(), conf).delete(outputDir, true);

    long startTime = System.currentTimeMillis();
    JobClient.runJob(conf);
    sLogger.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");

    return 0;
}

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From source file:mapreduce.DosAttack.java

License:Apache License

private void issue() throws IOException {
    LOG.info("Starting DOS on url[{}] with clients[{}]", wsURL, numMappers);
    DosMapper.init(wsURL);// www  .j ava 2s . com
    JobConf job = new JobConf(DosAttack.class);
    job.setJarByClass(DosAttack.class);
    job.setJobName("DOS Attack");
    job.setNumReduceTasks(0);
    job.setInputFormat(NullInputFormat.class);
    job.setOutputFormat(NullOutputFormat.class);
    job.setMapperClass(DosMapper.class);
    job.setMapOutputKeyClass(NullWritable.class);
    job.setMapOutputValueClass(NullWritable.class);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(NullWritable.class);
    job.setNumMapTasks(numMappers);
    job.setInt(NUM_MAPPERS_KEY, numMappers);
    job.setInt(NUM_REQUESTS_KEY, numRequests);
    job.set(TARGET_URL_KEY, wsURL);
    JobClient.runJob(job);
}

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From source file:mapreduce2.SpeciesDriver.java

public static void main(String[] args) throws Exception {
    JobClient client = new JobClient();
    JobConf conf = new JobConf(SpeciesDriver.class);
    conf.setJobName("Page-rank Species Graph Builder");
    final File f = new File(SpeciesDriver.class.getProtectionDomain().getCodeSource().getLocation().getPath());
    String inFiles = f.getAbsolutePath().replace("/build/classes", "") + "/src/InputFiles/species_medium.txt";
    String outFiles = f.getAbsolutePath().replace("/build/classes", "") + "/src/outputFiles/Result";
    FileInputFormat.setInputPaths(conf, new Path(inFiles));
    FileOutputFormat.setOutputPath(conf, new Path(outFiles));

    //conf.setOutputKeyClass(Text.class); 
    //conf.setOutputValueClass(Text.class); 
    conf.setMapperClass(SpeciesGraphBuilderMapper.class);
    conf.setMapOutputKeyClass(Text.class);
    conf.setMapOutputValueClass(Text.class);

    //conf.setInputFormat(org.apache.hadoop.mapred.TextInputFormat.class); 
    //conf.setOutputFormat(org.apache.hadoop.mapred.SequenceFileOutputFormat.class); 
    conf.setReducerClass(SpeciesGraphBuilderReducer.class);
    //conf.setCombinerClass(SpeciesGraphBuilderReducer.class); 

    //conf.setInputPath(new Path("graph1")); 
    //conf.setOutputPath(new Path("graph2")); 
    // take the input and output from the command line
    FileInputFormat.setInputPaths(conf, new Path(inFiles));
    FileOutputFormat.setOutputPath(conf, new Path(outFiles));

    client.setConf(conf);/*  w ww  .  j  a va2 s  . c  o m*/
    try {
        JobClient.runJob(conf);
    } catch (Exception e) {
        e.printStackTrace();
    }

    inFiles = f.getAbsolutePath().replace("/build/classes", "") + "/src/outputFiles/Result/part-00000";
    for (int i = 0; i < 15; i++) {
        client = new JobClient();
        conf = new JobConf(SpeciesDriver.class);
        conf.setJobName("Species Iter");

        int count = i + 1;
        outFiles = f.getAbsolutePath().replace("/build/classes", "") + "/src/outputFiles/Result" + count;
        conf.setNumReduceTasks(5);

        conf.setOutputKeyClass(Text.class);
        conf.setOutputValueClass(Text.class);

        FileInputFormat.setInputPaths(conf, new Path(inFiles));
        FileOutputFormat.setOutputPath(conf, new Path(outFiles));

        conf.setMapperClass(SpeciesIterMapper2.class);
        conf.setReducerClass(SpeciesIterReducer2.class);
        conf.setCombinerClass(SpeciesIterReducer2.class);

        client.setConf(conf);
        try {
            JobClient.runJob(conf);
        } catch (Exception e) {
            e.printStackTrace();
        }
        inFiles = outFiles;

    }

    //Viewer
    client = new JobClient();
    conf = new JobConf(SpeciesDriver.class);
    conf.setJobName("Species Viewer");

    conf.setOutputKeyClass(FloatWritable.class);
    conf.setOutputValueClass(Text.class);

    inFiles = f.getAbsolutePath().replace("/build/classes", "") + "/src/outputFiles/Result15/part-00000";
    outFiles = f.getAbsolutePath().replace("/build/classes", "") + "/src/outputFiles/ResultFinal";

    FileInputFormat.setInputPaths(conf, new Path(inFiles));
    FileOutputFormat.setOutputPath(conf, new Path(outFiles));

    conf.setMapperClass(SpeciesViewerMapper.class);
    conf.setReducerClass(org.apache.hadoop.mapred.lib.IdentityReducer.class);

    client.setConf(conf);
    try {
        JobClient.runJob(conf);
    } catch (Exception e) {
        e.printStackTrace();
    }

}

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From source file:mapreducecountersoldapi.MapReduceCountersOldApi.java

/**
 * @param args the command line arguments
 *//*w ww. jav a2  s . c o m*/
public static void main(String[] args) throws Exception {
    if (args.length != 2) {
        System.err.println("Usage: MapReduceCounters <input path> <output path>");
        System.exit(-1);
    }

    //Job job = new Job();
    JobConf conf = new JobConf(MapReduceCountersOldApi.class);
    //job.setJarByClass(MapReduceCountersOldApi.class);
    conf.setJobName("Clics old Api");
    //int Reducers = parseInt(args[2]);
    //job.setNumReduceTasks(Reducers);
    FileInputFormat.addInputPath(conf, new Path(args[0]));
    FileOutputFormat.setOutputPath(conf, new Path(args[1]));

    conf.setMapperClass(MaxCountMapperOldApi.class);
    conf.setReducerClass(MaxCountReducerOldApi.class);

    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(LongWritable.class);

    //job.setNumReduceTasks(tasks);
    //          FileSystem fs = FileSystem.newInstance(job.getConfiguration());
    //
    //        Path inputFilePath = new Path(args[0]);
    //   Path outputFilePath = new Path(args[1]);
    //   if (fs.exists(outputFilePath)) {
    //            fs.delete(outputFilePath, true);
    //   }

    //System.exit(job.waitForCompletion(true) ? 0 : 1);
    JobClient.runJob(conf);
}

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