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

Introduction

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

Prototype

public void setMapOutputKeyClass(Class<?> theClass) 

Source Link

Document

Set the key class for the map output data.

Usage

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);/*from  ww w.  j ava2 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:mapreduceindexfiles.MapReduceIndexFiles.java

/**
 * @param args the command line arguments
 *///from   www.  j  ava  2  s . c om
public static void main(String[] args) throws IOException, InterruptedException, ClassNotFoundException {
    // TODO code application logic here
    if (args.length != 3) {
        System.out.print(args.length);
        System.err.println("Usage: MapReduceIndexFiles <input> <output> <sequence>");
        System.exit(1);
    }
    Configuration conf = new Configuration();
    conf.set("sequence", args[2]);
    //conf.set("mapred.child.java.opts", "-Xmx1000m");
    //conf.set("mapred.reduce.child.java.opts", "-Xmx1g");
    //conf.set("mapred.map.child.java.opts", "-Xmx1g");
    // conf.set("mapred.tasktracker.reduce.tasks.maximum", "10");
    //conf.set("mapred.tasktracker.map.tasks.maximum", "10");
    //conf.set("io.sort.mb", "4000");
    JobConf job = new JobConf(conf);
    job.setJarByClass(MapReduceIndexFiles.class);

    WholeFileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));
    //job.setCombinerClass(IndexFilesReducer.class);
    //job.setInputFormat(WholeFileInputFormat.class);
    job.setMapperClass(IndexFilesMapper.class);
    job.setReducerClass(IndexFilesReducer.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(Text.class);
    //job.setOutputKeyClass(Text.class);
    //job.setOutputValueClass(Text.class);
    //job.setInputFormat(FileInputFormat.class);
    //job.setOutputFormat(FileOutputFormat.class);
    //job.setNumMapTasks(10);
    //job.setNumReduceTasks(10);
    Date start = new Date();
    JobClient.runJob(job);
    Date end = new Date();
    System.out.println("The Process took " + (end.getTime() - start.getTime()) / 1000 + "seconds");
}

---

From source file:mapreducejava.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);/*from w ww  . j  a  v  a  2s .  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 < 25; 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/Result25/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:name.abhijitsarkar.hadoop.citation.CitationCombiner.java

License:Open Source License

@Override
public int run(String[] args) throws Exception {
    JobConf conf = new JobConf(getConf(), getClass());
    conf.setJobName("citation-combiner");

    /* This is to set the separator byte for KeyValueTextInputFormat */
    conf.set("key.value.separator.in.input.line", ",");

    conf.setMapperClass(CitationMapper.class);
    conf.setReducerClass(CitationReducer.class);

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

    conf.setInputFormat(KeyValueTextInputFormat.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. ja  v  a 2s. com*/

    return 0;
}

---

From source file:net.peacesoft.nutch.crawl.RaovatPostDeleteDuplicates.java

License:Apache License

public void dedup(String solrUrl, boolean noCommit) throws IOException {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    long start = System.currentTimeMillis();
    LOG.info("RaovatPostDeleteDuplicates: starting at " + sdf.format(start));
    LOG.info("RaovatPostDeleteDuplicates: Solr url: " + solrUrl);

    JobConf job = new NutchJob(getConf());

    job.set(ReSolrConstants.SERVER_URL, solrUrl);
    job.setBoolean("noCommit", noCommit);
    job.setInputFormat(RaovatPostDeleteDuplicates.SolrInputFormat.class);
    job.setOutputFormat(NullOutputFormat.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(RaovatPostDeleteDuplicates.SolrRecord.class);
    job.setMapperClass(IdentityMapper.class);
    job.setReducerClass(RaovatPostDeleteDuplicates.class);

    JobClient.runJob(job);/*  w w w .  j a  v a 2s  .c om*/

    long end = System.currentTimeMillis();
    LOG.info("RaovatPostDeleteDuplicates: finished at " + sdf.format(end) + ", elapsed: "
            + TimingUtil.elapsedTime(start, end));
}

---

From source file:nl.tudelft.graphalytics.mapreducev2.MapReduceJob.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    FileSystem dfs = FileSystem.get(getConf());
    String inPath = inputPath;//from   w ww.  j  a  va2s  . c om

    while (!isFinished()) {
        iteration++;

        // Prepare job configuration
        JobConf jobConfiguration = new JobConf(this.getConf());
        jobConfiguration.setJarByClass(this.getClass());

        jobConfiguration.setMapOutputKeyClass(getMapOutputKeyClass());
        jobConfiguration.setMapOutputValueClass(getMapOutputValueClass());

        jobConfiguration.setMapperClass(getMapperClass());
        if (getCombinerClass() != null)
            jobConfiguration.setCombinerClass(getCombinerClass());
        jobConfiguration.setReducerClass(getReducerClass());

        jobConfiguration.setOutputKeyClass(getOutputKeyClass());
        jobConfiguration.setOutputValueClass(getOutputValueClass());

        jobConfiguration.setInputFormat(getInputFormatClass());
        jobConfiguration.setOutputFormat(getOutputFormatClass());

        if (getNumMappers() != -1)
            jobConfiguration.setNumMapTasks(getNumMappers());
        if (getNumReducers() != -1)
            jobConfiguration.setNumReduceTasks(getNumReducers());

        setConfigurationParameters(jobConfiguration);

        // Set the input and output paths
        String outPath = intermediatePath + "/iteration-" + iteration;
        FileInputFormat.addInputPath(jobConfiguration, new Path(inPath));
        FileOutputFormat.setOutputPath(jobConfiguration, new Path(outPath));

        // Execute the current iteration
        RunningJob jobExecution = JobClient.runJob(jobConfiguration);
        jobExecution.waitForCompletion();

        // Remove the output of the previous job (unless it is the input graph)
        if (iteration != 1) {
            dfs.delete(new Path(inPath), true);
        }
        inPath = outPath;

        processJobOutput(jobExecution);
    }

    // Rename the last job output to the specified output path
    try {
        dfs.mkdirs(new Path(outputPath).getParent());
        dfs.rename(new Path(inPath), new Path(outputPath));
    } catch (Exception e) {
        LOG.warn("Failed to rename MapReduce job output.", e);
    }

    return 0;
}

---

From source file:nthu.scopelab.tsqr.ssvd.ABtDenseOutJob.java

License:Apache License

public static void run(Configuration conf, Path[] inputPath, Path inputBt, Path outputPath, int k, int p,
        int reduceTasks, int mis) throws Exception {

    JobConf job = new JobConf(conf, ABtDenseOutJob.class);
    job.setInputFormat(SequenceFileInputFormat.class);
    job.setOutputFormat(SequenceFileOutputFormat.class);

    job.setInt(QJob.PROP_K, k);/*from  w w w.  jav  a 2  s. c  o m*/
    job.setInt(QJob.PROP_P, p);
    job.set(PROP_BT_PATH, inputBt.toString());

    FileOutputFormat.setOutputPath(job, outputPath);
    job.setJobName("ABtDenseOutJob");

    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(LMatrixWritable.class);
    job.setOutputKeyClass(IntWritable.class);
    job.setOutputValueClass(LMatrixWritable.class);

    job.setMapperClass(ABtMapper.class);

    fileGather fgather = new fileGather(inputPath, "", FileSystem.get(job));
    mis = Checker.checkMis(mis, fgather.getInputSize(), FileSystem.get(job));
    job.setNumMapTasks(fgather.recNumMapTasks(mis));

    job.setNumReduceTasks(0);

    FileInputFormat.setInputPaths(job, inputPath);

    RunningJob rj = JobClient.runJob(job);
}

---

From source file:nthu.scopelab.tsqr.ssvd.BtJob.java

License:Apache License

public static void run(Configuration conf, Path[] inputPath, Path btPath, String qrfPath, int k, int p,
        int outerBlockHeight, int reduceTasks, boolean outputBBtProducts, String reduceSchedule, int mis)
        throws Exception {
    boolean outputQ = true;

    String stages[] = reduceSchedule.split(",");

    JobConf job = new JobConf(conf, BtJob.class);
    job.setInputFormat(SequenceFileInputFormat.class);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    job.setInt(SCHEDULE_NUM, stages.length);
    job.setInt(PROP_OUTER_PROD_BLOCK_HEIGHT, outerBlockHeight);
    job.setInt(QJob.PROP_K, k);/*from   w ww .j a  v  a 2s.c o m*/
    job.setInt(QJob.PROP_P, p);
    job.setBoolean(QmultiplyJob.OUTPUT_Q, outputQ);
    job.setBoolean(PROP_OUPTUT_BBT_PRODUCTS, outputBBtProducts);
    job.set(QmultiplyJob.QRF_DIR, qrfPath);
    FileSystem.get(job).delete(btPath, true);

    FileOutputFormat.setOutputPath(job, btPath);

    FileOutputFormat.setCompressOutput(job, true);
    FileOutputFormat.setOutputCompressorClass(job, DefaultCodec.class);
    SequenceFileOutputFormat.setOutputCompressionType(job, CompressionType.BLOCK);

    job.setJobName("BtJob");

    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(SparseRowBlockWritable.class);
    job.setOutputKeyClass(IntWritable.class);
    //job.setOutputValueClass(SparseRowBlockWritable.class);
    job.setOutputValueClass(VectorWritable.class);

    job.setMapperClass(BtMapper.class);
    job.setCombinerClass(OuterProductCombiner.class);
    job.setReducerClass(OuterProductReducer.class);

    fileGather fgather = new fileGather(inputPath, "", FileSystem.get(job));
    mis = Checker.checkMis(mis, fgather.getInputSize(), FileSystem.get(job));
    job.setNumMapTasks(fgather.recNumMapTasks(mis));

    //job.setNumReduceTasks(0);
    job.setNumReduceTasks(reduceTasks);

    FileInputFormat.setInputPaths(job, inputPath);

    if (outputQ) {
        MultipleOutputs.addNamedOutput(job, QmultiplyJob.Q_MAT, SequenceFileOutputFormat.class,
                IntWritable.class, LMatrixWritable.class);
    }
    if (outputBBtProducts) {
        MultipleOutputs.addNamedOutput(job, OUTPUT_BBT, SequenceFileOutputFormat.class, IntWritable.class,
                VectorWritable.class);
    }
    RunningJob rj = JobClient.runJob(job);
    System.out.println("Btjob Job ID: " + rj.getJobID().toString());
}

---

From source file:nthu.scopelab.tsqr.ssvd.itBtJob.java

License:Apache License

public static void run(Configuration conf, Path[] inputPath, Path btPath, String qrfPath, int k, int p,
        int outerBlockHeight, int reduceTasks, boolean outputBBtProducts, String reduceSchedule, int mis)
        throws Exception {
    boolean outputQ = true;

    String stages[] = reduceSchedule.split(",");

    JobConf job = new JobConf(conf, itBtJob.class);
    job.setInputFormat(SequenceFileInputFormat.class);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    job.setInt(SCHEDULE_NUM, stages.length);
    job.setInt(PROP_OUTER_PROD_BLOCK_HEIGHT, outerBlockHeight);
    job.setInt(QJob.PROP_K, k);/*from  ww w  . ja  va 2s . c  o m*/
    job.setInt(QJob.PROP_P, p);
    job.setBoolean(QmultiplyJob.OUTPUT_Q, outputQ);
    job.setBoolean(PROP_OUPTUT_BBT_PRODUCTS, outputBBtProducts);
    job.set(QmultiplyJob.QRF_DIR, qrfPath);
    FileSystem.get(job).delete(btPath, true);

    FileOutputFormat.setOutputPath(job, btPath);

    FileOutputFormat.setCompressOutput(job, true);
    FileOutputFormat.setOutputCompressorClass(job, DefaultCodec.class);
    SequenceFileOutputFormat.setOutputCompressionType(job, CompressionType.BLOCK);

    job.setJobName("itBtJob");

    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(SparseRowBlockWritable.class);
    job.setOutputKeyClass(IntWritable.class);
    //job.setOutputValueClass(SparseRowBlockWritable.class);
    job.setOutputValueClass(VectorWritable.class);

    job.setMapperClass(BtMapper.class);
    job.setCombinerClass(OuterProductCombiner.class);
    job.setReducerClass(OuterProductReducer.class);

    fileGather fgather = new fileGather(inputPath, "", FileSystem.get(job));
    mis = Checker.checkMis(mis, fgather.getInputSize(), FileSystem.get(job));
    job.setNumMapTasks(fgather.recNumMapTasks(mis));

    //job.setNumReduceTasks(0);
    job.setNumReduceTasks(reduceTasks);

    FileInputFormat.setInputPaths(job, inputPath);

    if (outputQ) {
        MultipleOutputs.addNamedOutput(job, QmultiplyJob.Q_MAT, SequenceFileOutputFormat.class,
                IntWritable.class, LMatrixWritable.class);
    }
    if (outputBBtProducts) {
        MultipleOutputs.addNamedOutput(job, OUTPUT_BBT, SequenceFileOutputFormat.class, IntWritable.class,
                VectorWritable.class);
    }
    RunningJob rj = JobClient.runJob(job);
    System.out.println("itBtJob Job ID: " + rj.getJobID().toString());
}

---

From source file:nthu.scopelab.tsqr.ssvd.UJob.java

License:Apache License

public void start(Configuration conf, Path inputPathQ, Path inputUHatPath, Path sigmaPath, Path outputPath,
        int k, boolean uHalfSigma, int mis) throws ClassNotFoundException, InterruptedException, IOException {
    String input = "";

    JobConf job = new JobConf(conf, UJob.class);
    jobclient = new JobClient(job);
    job.setJobName("UJob");
    job.setInputFormat(SequenceFileInputFormat.class);
    job.setOutputFormat(SequenceFileOutputFormat.class);

    job.setMapperClass(MultiplyMapper.class);

    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(LMatrixWritable.class);
    job.setMapOutputKeyClass(LongWritable.class);
    job.setMapOutputValueClass(LMatrixWritable.class);

    FileSystem fs = FileSystem.get(job);
    fileGather fgather = new fileGather(
            new Path(inputPathQ.toString().substring(0, inputPathQ.toString().lastIndexOf("/") - 1)), "Q-", fs);
    mis = Checker.checkMis(mis, fgather.getInputSize(), fs);
    job.setNumMapTasks(fgather.recNumMapTasks(mis));

    job.setNumReduceTasks(0);//w  w  w  .  j av  a2 s.c  o m
    job.set("mapreduce.output.basename", OUTPUT_U);
    job.set(PROP_UHAT_PATH, inputUHatPath.toString());
    job.set(PROP_SIGMA_PATH, sigmaPath.toString());
    if (uHalfSigma) {
        job.set(PROP_U_HALFSIGMA, "y");
    }
    job.setInt(QJob.PROP_K, k);
    FileSystem.get(job).delete(outputPath, true);
    FileOutputFormat.setOutputPath(job, outputPath);
    FileOutputFormat.setCompressOutput(job, true);
    FileOutputFormat.setOutputCompressorClass(job, DefaultCodec.class);
    SequenceFileOutputFormat.setOutputCompressionType(job, CompressionType.BLOCK);

    FileInputFormat.setInputPaths(job, inputPathQ);
    //JobClient.runJob(job);
    jobid = jobclient.submitJob(job).getID();

}

---

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