Example usage for org.apache.hadoop.mapreduce Job setNumReduceTasks

Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce Job setNumReduceTasks.

Prototype

public void setNumReduceTasks(int tasks) throws IllegalStateException 

Source Link

Document

Set the number of reduce tasks for the job.

Usage

From source file:biglayer.AutoCoder.java

License:Apache License

/**
 * Runs this tool.//from w  ww .  j a v a  2s.c  o  m
 */
@SuppressWarnings({ "static-access" })
public int run(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input path").create(INPUT));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output path").create(OUTPUT));
    options.addOption(OptionBuilder.withArgName("num").hasArg().withDescription("number of reducers")
            .create(NUM_REDUCERS));

    CommandLine cmdline;
    CommandLineParser parser = new GnuParser();

    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        return -1;
    }

    /*if (!cmdline.hasOption(INPUT) || !cmdline.hasOption(OUTPUT)) {
       System.out.println("args: " + Arrays.toString(args));
       HelpFormatter formatter = new HelpFormatter();
       formatter.setWidth(120);
       formatter.printHelp(this.getClass().getName(), options);
       ToolRunner.printGenericCommandUsage(System.out);
       return -1;
    }*/

    //String inputPath = cmdline.getOptionValue(INPUT);
    //String outputPath = cmdline.getOptionValue(OUTPUT);

    String inputPath = "qiwang321/MNIST-mingled-key/part*";
    String outputPath = "shangfu/layeroutput";

    int reduceTasks = cmdline.hasOption(NUM_REDUCERS) ? Integer.parseInt(cmdline.getOptionValue(NUM_REDUCERS))
            : 1;

    LOG.info("Tool: " + AutoCoder.class.getSimpleName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - number of reducers: " + reduceTasks);
    Configuration conf = getConf();

    conf.setInt("num_reduce_task", reduceTasks);
    conf.set("sidepath", outputPath + "_side/");

    Job job0 = Job.getInstance(conf);
    job0.setJobName(AutoCoder.class.getSimpleName());
    job0.setJarByClass(AutoCoder.class);
    job0.setNumReduceTasks(reduceTasks);

    job0.getConfiguration().setInt("layer_ind", 0);

    FileInputFormat.setInputPaths(job0, new Path(inputPath));
    FileOutputFormat.setOutputPath(job0, new Path(outputPath + "_0"));

    job0.setInputFormatClass(KeyValueTextInputFormat.class);
    job0.setOutputFormatClass(SequenceFileOutputFormat.class);

    job0.setMapOutputKeyClass(PairOfInts.class);
    job0.setMapOutputValueClass(ModelNode.class);
    job0.setOutputKeyClass(PairOfInts.class);
    job0.setOutputValueClass(ModelNode.class);

    job0.setMapperClass(MyMapper0.class);
    job0.setReducerClass(MyReducer0.class);
    job0.setPartitionerClass(MyPartitioner.class);
    // Delete the output directory if it exists already.
    Path outputDir = new Path(outputPath + "_0");
    FileSystem.get(getConf()).delete(outputDir, true);
    long startTime = System.currentTimeMillis();
    long codeStart = System.currentTimeMillis();
    double codeTimeSum = 0;
    job0.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");
    codeTimeSum += (System.currentTimeMillis() - startTime) / 1000.0;

    for (int iterations = 1; iterations < GlobalUtil.NUM_LAYER + 1; iterations++) {
        Job job1 = Job.getInstance(conf);
        job1.setJobName(AutoCoder.class.getSimpleName());
        job1.setJarByClass(AutoCoder.class);
        job1.setNumReduceTasks(reduceTasks);
        job1.getConfiguration().setInt("layer_ind", iterations);
        FileInputFormat.setInputPaths(job1, new Path(outputPath + "_" + (iterations - 1)));
        FileOutputFormat.setOutputPath(job1, new Path(outputPath + "_" + iterations + "_train"));

        LOG.info("Tool: " + AutoCoder.class.getSimpleName());
        LOG.info(" - input path: " + outputPath + "_" + (iterations - 1));
        LOG.info(" - output path: " + outputPath + "_" + iterations + "_train");
        LOG.info(" - number of reducers: " + reduceTasks);

        job1.setInputFormatClass(SequenceFileInputFormat.class);
        job1.setOutputFormatClass(SequenceFileOutputFormat.class);

        job1.setMapOutputKeyClass(PairOfInts.class);
        job1.setMapOutputValueClass(ModelNode.class);
        job1.setOutputKeyClass(PairOfInts.class);
        job1.setOutputValueClass(ModelNode.class);

        job1.setMapperClass(MyMapper.class);
        job1.setReducerClass(MyReducer_Train.class);
        job1.setPartitionerClass(MyPartitioner.class);
        // Delete the output directory if it exists already.
        outputDir = new Path(outputPath + "_" + iterations + "_train");
        FileSystem.get(getConf()).delete(outputDir, true);
        startTime = System.currentTimeMillis();
        job1.waitForCompletion(true);
        LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");
        codeTimeSum += (System.currentTimeMillis() - startTime) / 1000.0;

        Job job2 = Job.getInstance(conf);
        job2.setJobName(AutoCoder.class.getSimpleName());
        job2.setJarByClass(AutoCoder.class);
        job2.setNumReduceTasks(reduceTasks);
        job2.getConfiguration().setInt("layer_ind", iterations);
        FileInputFormat.setInputPaths(job2, new Path(outputPath + "_" + (iterations + "_train")));
        FileOutputFormat.setOutputPath(job2, new Path(outputPath + "_" + iterations));

        LOG.info("Tool: " + AutoCoder.class.getSimpleName());
        LOG.info(" - input path: " + outputPath + "_" + iterations + "_train");
        LOG.info(" - output path: " + outputPath + "_" + iterations);
        LOG.info(" - number of reducers: " + reduceTasks);

        job2.setInputFormatClass(SequenceFileInputFormat.class);
        job2.setOutputFormatClass(SequenceFileOutputFormat.class);

        job2.setMapOutputKeyClass(PairOfInts.class);
        job2.setMapOutputValueClass(ModelNode.class);
        job2.setOutputKeyClass(PairOfInts.class);
        job2.setOutputValueClass(ModelNode.class);

        job2.setMapperClass(MyMapper.class);
        job2.setReducerClass(MyReducer_GenData.class);
        job2.setPartitionerClass(MyPartitioner.class);
        // Delete the output directory if it exists already.
        outputDir = new Path(outputPath + "_" + iterations);
        FileSystem.get(getConf()).delete(outputDir, true);
        startTime = System.currentTimeMillis();
        job2.waitForCompletion(true);
        LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");
        codeTimeSum += (System.currentTimeMillis() - startTime) / 1000.0;

    }

    LOG.info(" - input path: " + outputPath + "_" + GlobalUtil.NUM_LAYER);
    LOG.info(" - output path: " + outputPath);
    reduceTasks = 1;
    LOG.info(" - number of reducers: " + reduceTasks);

    Job job_super = Job.getInstance(conf);
    job_super.setJobName(AutoCoder.class.getSimpleName());
    job_super.setJarByClass(AutoCoder.class);
    job_super.setNumReduceTasks(reduceTasks);

    FileInputFormat.setInputPaths(job_super, new Path(outputPath + "_" + GlobalUtil.NUM_LAYER));
    FileOutputFormat.setOutputPath(job_super, new Path(outputPath));

    job_super.setInputFormatClass(SequenceFileInputFormat.class);
    job_super.setOutputFormatClass(SequenceFileOutputFormat.class);

    job_super.setMapOutputKeyClass(PairOfInts.class);
    job_super.setMapOutputValueClass(ModelNode.class);
    job_super.setOutputKeyClass(NullWritable.class);
    job_super.setOutputValueClass(NullWritable.class);

    job_super.setMapperClass(MyMapper_Super.class);
    job_super.setReducerClass(MyReducer_Super.class);
    job_super.setPartitionerClass(MyPartitioner.class);

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

    startTime = System.currentTimeMillis();
    job_super.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");
    codeTimeSum += (System.currentTimeMillis() - startTime) / 1000.0;

    Log.info("Final Time: " + ((System.currentTimeMillis() - codeStart) / 1000.0) + " seconds,  " + codeTimeSum
            + " seconds.");
    //prepareNextIteration(inputPath0, outputPath,iterations,conf,reduceTasks);

    return 0;
}

---

From source file:bigmodel.AutoCoderLocal.java

License:Apache License

/**
 * Runs this tool.//from   www  .j  a  va  2 s .  c  o  m
 */
@SuppressWarnings({ "static-access" })
public int run(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input path").create(INPUT));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output path").create(OUTPUT));
    options.addOption(OptionBuilder.withArgName("num").hasArg().withDescription("number of reducers")
            .create(NUM_REDUCERS));

    CommandLine cmdline;
    CommandLineParser parser = new GnuParser();

    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        return -1;
    }

    if (!cmdline.hasOption(INPUT) || !cmdline.hasOption(OUTPUT)) {
        System.out.println("args: " + Arrays.toString(args));
        HelpFormatter formatter = new HelpFormatter();
        formatter.setWidth(120);
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    String inputPath = cmdline.getOptionValue(INPUT) + "/part-r-00000";
    String outputPath = cmdline.getOptionValue(OUTPUT);
    String dataPath = cmdline.getOptionValue(INPUT) + "/common";
    //String inputPath = "/home/qiwang321/mapreduce-data/data/in-mingled1-5/part*";
    //String outputPath = "output";
    //String dataPath = "/home/qiwang321/mapreduce-data/data/in-mingled1-5/common";
    int reduceTasks = cmdline.hasOption(NUM_REDUCERS) ? Integer.parseInt(cmdline.getOptionValue(NUM_REDUCERS))
            : 1;

    LOG.info("Tool: " + AutoCoderLocal.class.getSimpleName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - number of reducers: " + reduceTasks);
    Configuration conf = getConf();
    initialParameters(conf);

    conf.set("dataPath", dataPath);

    Job job = Job.getInstance(conf);
    job.setJobName(AutoCoderLocal.class.getSimpleName());
    job.setJarByClass(AutoCoderLocal.class);
    // set the path of the information of k clusters in this iteration
    job.getConfiguration().set("sidepath", inputPath + "/side_output");
    job.setNumReduceTasks(reduceTasks);

    dataShuffle();

    FileInputFormat.setInputPaths(job, new Path(inputPath));
    FileOutputFormat.setOutputPath(job, new Path(outputPath));
    FileInputFormat.setMinInputSplitSize(job, 1000 * 1024 * 1024);
    FileInputFormat.setMaxInputSplitSize(job, 1000 * 1024 * 1024);

    job.setInputFormatClass(TextInputFormat.class);
    job.setOutputFormatClass(SequenceFileOutputFormat.class);

    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(ModelNode.class);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(SuperModel.class);

    job.setMapperClass(MyMapper.class);
    job.setReducerClass(MyReducer.class);
    job.setPartitionerClass(MyPartitioner.class);

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

    long startTime = System.currentTimeMillis();
    job.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");

    //prepareNextIteration(inputPath0, outputPath,iterations,conf,reduceTasks);

    return 0;
}

---

From source file:bigsidemodel.AutoCoder.java

License:Apache License

/**
 * Runs this tool./*w ww.  ja  v a2  s  . c  o m*/
 */
@SuppressWarnings({ "static-access" })
public int run(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input path").create(INPUT));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output path").create(OUTPUT));
    options.addOption(OptionBuilder.withArgName("num").hasArg().withDescription("number of reducers")
            .create(NUM_REDUCERS));

    CommandLine cmdline;
    CommandLineParser parser = new GnuParser();

    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        return -1;
    }

    /*if (!cmdline.hasOption(INPUT) || !cmdline.hasOption(OUTPUT)) {
       System.out.println("args: " + Arrays.toString(args));
       HelpFormatter formatter = new HelpFormatter();
       formatter.setWidth(120);
       formatter.printHelp(this.getClass().getName(), options);
       ToolRunner.printGenericCommandUsage(System.out);
       return -1;
    }*/

    //String inputPath = cmdline.getOptionValue(INPUT);
    //String outputPath = cmdline.getOptionValue(OUTPUT);

    String inputPath = "qiwang321/best5-mingled-key-56x56/part*";
    String outputPath = "shangfu/bigoutput";
    int reduceTasks = cmdline.hasOption(NUM_REDUCERS) ? Integer.parseInt(cmdline.getOptionValue(NUM_REDUCERS))
            : 1;

    LOG.info("Tool: " + AutoCoder.class.getSimpleName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath + "0");
    LOG.info(" - number of reducers: " + reduceTasks);
    Configuration conf = getConf();
    conf.setInt("num_reduce_task", reduceTasks);
    conf.set("sidepath", outputPath + "_side/");

    Job job0 = Job.getInstance(conf);
    job0.setJobName(AutoCoder.class.getSimpleName());
    job0.setJarByClass(AutoCoder.class);
    // set the path of the information of k clusters in this iteration
    job0.setNumReduceTasks(reduceTasks);

    FileInputFormat.setInputPaths(job0, new Path(inputPath));
    FileOutputFormat.setOutputPath(job0, new Path(outputPath + "0"));

    job0.setInputFormatClass(KeyValueTextInputFormat.class);
    job0.setOutputFormatClass(SequenceFileOutputFormat.class);

    job0.setMapOutputKeyClass(PairOfInts.class);
    job0.setMapOutputValueClass(DataNode.class);
    job0.setOutputKeyClass(PairOfInts.class);
    job0.setOutputValueClass(DataNode.class);

    job0.setMapperClass(MyMapper0.class);
    job0.setReducerClass(MyReducer0.class);
    job0.setPartitionerClass(MyPartitioner.class);

    // Delete the output directory if it exists already.
    Path outputDir = new Path(outputPath + "0");
    FileSystem.get(getConf()).delete(outputDir, true);

    long codeStart = System.currentTimeMillis();
    double jobTimeSum = 0;

    long startTime = System.currentTimeMillis();
    job0.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");
    jobTimeSum += (System.currentTimeMillis() - startTime) / 1000.0;

    //======= Job 1
    LOG.info("Tool: " + AutoCoder.class.getSimpleName());
    LOG.info(" - input path: " + outputPath + "0");
    LOG.info(" - output path: " + outputPath + "1");
    LOG.info(" - number of reducers: " + 1);
    int nModel = reduceTasks;
    reduceTasks = 1;

    Job job1 = Job.getInstance(conf);
    job1.setJobName(AutoCoder.class.getSimpleName());
    job1.setJarByClass(AutoCoder.class);
    // set the path of the information of k clusters in this iteration
    job1.setNumReduceTasks(reduceTasks);

    FileInputFormat.setInputPaths(job1, new Path(outputPath + "0"));
    FileOutputFormat.setOutputPath(job1, new Path(outputPath + "1"));

    job1.setInputFormatClass(SequenceFileInputFormat.class);
    job1.setOutputFormatClass(SequenceFileOutputFormat.class);

    job1.setMapOutputKeyClass(PairOfInts.class);
    job1.setMapOutputValueClass(DataNode.class);
    job1.setOutputKeyClass(NullWritable.class);
    job1.setOutputValueClass(NullWritable.class);

    job1.setMapperClass(MyMapper1.class);
    job1.setReducerClass(MyReducer1.class);
    job1.setPartitionerClass(MyPartitioner.class);

    // Delete the output directory if it exists already.
    outputDir = new Path(outputPath + "1");
    FileSystem.get(getConf()).delete(outputDir, true);

    startTime = System.currentTimeMillis();
    job1.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");
    jobTimeSum += (System.currentTimeMillis() - startTime) / 1000.0;
    LOG.info("Final Time: " + ((System.currentTimeMillis() - codeStart) / 1000.0) + " seconds,  " + jobTimeSum
            + " seconds.");

    return 0;
}

---

From source file:binningbycategories.BinningbyCategories.java

/**
 * @param args the command line arguments
 * @throws java.lang.Exception/*from w ww  . j  a v a 2 s . c  o m*/
 */
public static void main(String[] args) throws Exception {
    Configuration conf = new Configuration();
    Job job = new Job(conf, "Binning");
    job.setJarByClass(BinningbyCategories.class);
    job.setMapperClass(YouTubeBinMapper.class);
    job.setNumReduceTasks(0);

    TextInputFormat.setInputPaths(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    // Configure the MultipleOutputs by adding an output called "bins"
    // With the proper output format and mapper key/value pairs
    MultipleOutputs.addNamedOutput(job, "bins", TextOutputFormat.class, Text.class, NullWritable.class);

    // Enable the counters for the job
    // If there is a significant number of different named outputs, this
    // should be disabled
    MultipleOutputs.setCountersEnabled(job, true);

    System.exit(job.waitForCompletion(true) ? 0 : 2);
}

---

From source file:BinningByState.Driver.java

public static void main(String args[]) throws IOException, InterruptedException, ClassNotFoundException {
    Configuration conf = new Configuration();
    Job job = Job.getInstance(conf, "BinningByState");
    MultipleOutputs.addNamedOutput(job, "bins", TextOutputFormat.class, Text.class, NullWritable.class);
    MultipleOutputs.setCountersEnabled(job, true);
    job.setJarByClass(Driver.class);
    job.setMapperClass(BinningMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(NullWritable.class);
    job.setNumReduceTasks(0);
    //        job.setOutputKeyClass(Text.class);
    //        job.setOutputValueClass(NullWritable.class);
    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    System.exit(job.waitForCompletion(true) ? 0 : 1);
}

---

From source file:br.com.lassal.nqueens.grid.job.GenerateSolutions.java

public int run(String[] args) throws Exception {
    // Configuration processed by ToolRunner
    Configuration conf = getConf();

    // Create a JobConf using the processed conf
    Job job = new Job(conf, "nqueens-gensolutions");
    job.setJarByClass(GenerateSolutions.class);

    // este job nao possui reduce tasks
    job.setNumReduceTasks(0);

    int queensNumber = Integer.parseInt(args[0]);

    this.setWorkingFolder(queensNumber, job);

    job.setMapperClass(br.com.lassal.nqueens.grid.mapreduce.NQueenPartialShotMapper.class);

    // Submit the job, then poll for progress until the job is complete
    boolean result = job.waitForCompletion(true);
    return result ? 0 : 1;

}

---

From source file:bulkload.ImportTsv.java

License:Apache License

/**
 * Sets up the actual job./*from   w  w w  . j av a 2  s  .  c o m*/
 * 
 * @param conf
 *            The current configuration.
 * @param args
 *            The command line parameters.
 * @return The newly created job.
 * @throws IOException
 *             When setting up the job fails.
 */
public static Job createSubmittableJob(Configuration conf, String[] args) throws IOException {

    Job job = null;
    try (Connection connection = ConnectionFactory.createConnection(conf)) {
        try (Admin admin = connection.getAdmin()) {
            // Support non-XML supported characters
            // by re-encoding the passed separator as a Base64 string.
            String actualSeparator = conf.get(SEPARATOR_CONF_KEY);
            if (actualSeparator != null) {
                conf.set(SEPARATOR_CONF_KEY, Base64.encodeBytes(actualSeparator.getBytes()));
            }
            TableName tableName = TableName.valueOf(args[0]);
            if (!admin.tableExists(tableName)) {
                String errorMsg = format("Table '%s' does not exist.", tableName);
                LOG.error(errorMsg);
                throw new TableNotFoundException(errorMsg);
            }
            Path inputDir = new Path(args[1]);
            String jobName = conf.get(JOB_NAME_CONF_KEY, NAME + "_" + tableName.getNameAsString());
            job = Job.getInstance(conf, jobName);
            job.setJarByClass(TsvImporter.class);
            FileInputFormat.setInputPaths(job, inputDir);
            job.setInputFormatClass(TextInputFormat.class);
            job.setMapperClass(TsvImporter.class);

            String hfileOutPath = conf.get(BULK_OUTPUT_CONF_KEY);
            if (hfileOutPath != null) {
                try (HTable table = (HTable) connection.getTable(tableName)) {
                    Path outputDir = new Path(hfileOutPath);
                    FileSystem fs = FileSystem.get(conf);
                    if (fs.exists(outputDir)) {
                        if (!fs.delete(outputDir, true)) {
                            throw new IllegalStateException("delete path:" + outputDir + " failed");
                        }
                    }
                    FileOutputFormat.setOutputPath(job, outputDir);
                    job.setMapOutputKeyClass(ImmutableBytesWritable.class);
                    job.setMapOutputValueClass(Put.class);
                    job.setReducerClass(PutSortReducer.class);
                    HFileOutputFormat2.configureIncrementalLoad(job, table, table);
                }
            } else {
                // No reducers. Just write straight to table. Call
                // initTableReducerJob
                // to set up the TableOutputFormat.
                TableMapReduceUtil.initTableReducerJob(tableName.getNameAsString(), null, job);
                job.setNumReduceTasks(0);

                //               TableMapReduceUtil.addDependencyJars(job);
                //               TableMapReduceUtil.addDependencyJars(job.getConfiguration(),
                //                     com.google.common.base.Function.class /* Guava used by TsvParser */);
            }

            // Workaround to remove unnecessary hadoop dependencies
            String[] jars = job.getConfiguration().get("tmpjars").split(",", -1);
            StringBuilder filteredJars = new StringBuilder();
            for (String j : jars) {
                String[] parts = j.split("/", -1);
                String fileName = parts[parts.length - 1];
                if (fileName.indexOf("hadoop-") != 0) {
                    filteredJars.append(j);
                    filteredJars.append(",");
                }
            }
            job.getConfiguration().set("tmpjars", filteredJars.toString());
        }
    }

    return job;
}

---

From source file:ca.uwaterloo.cs.bigdata2017w.assignment0.PerfectX.java

License:Apache License

/**
 * Runs this tool.// w w w.j  a v  a2  s  . c o m
 */
@Override
public int run(String[] argv) throws Exception {
    final Args args = new Args();
    CmdLineParser parser = new CmdLineParser(args, ParserProperties.defaults().withUsageWidth(100));

    try {
        parser.parseArgument(argv);
    } catch (CmdLineException e) {
        System.err.println(e.getMessage());
        parser.printUsage(System.err);
        return -1;
    }

    LOG.info("Tool: " + PerfectX.class.getSimpleName());
    LOG.info(" - input path: " + args.input);
    LOG.info(" - output path: " + args.output);
    LOG.info(" - number of reducers: " + args.numReducers);
    LOG.info(" - use in-mapper combining: " + args.imc);

    Configuration conf = getConf();
    Job job = Job.getInstance(conf);
    job.setJobName(PerfectX.class.getSimpleName());
    job.setJarByClass(PerfectX.class);

    job.setNumReduceTasks(args.numReducers);

    FileInputFormat.setInputPaths(job, new Path(args.input));
    FileOutputFormat.setOutputPath(job, new Path(args.output));

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    job.setOutputFormatClass(TextOutputFormat.class);

    job.setMapperClass(args.imc ? MyMapperIMC.class : MyMapper.class);
    job.setCombinerClass(MyReducer.class);
    job.setReducerClass(MyReducer.class);

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

    long startTime = System.currentTimeMillis();
    job.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");

    return 0;
}

---

From source file:ca.uwaterloo.cs.bigdata2017w.assignment0.WordCount.java

License:Apache License

/**
 * Runs this tool.//from   w w  w .  j av  a 2 s.  co m
 */
@Override
public int run(String[] argv) throws Exception {
    final Args args = new Args();
    CmdLineParser parser = new CmdLineParser(args, ParserProperties.defaults().withUsageWidth(100));

    try {
        parser.parseArgument(argv);
    } catch (CmdLineException e) {
        System.err.println(e.getMessage());
        parser.printUsage(System.err);
        return -1;
    }

    LOG.info("Tool: " + WordCount.class.getSimpleName());
    LOG.info(" - input path: " + args.input);
    LOG.info(" - output path: " + args.output);
    LOG.info(" - number of reducers: " + args.numReducers);
    LOG.info(" - use in-mapper combining: " + args.imc);

    Configuration conf = getConf();
    Job job = Job.getInstance(conf);
    job.setJobName(WordCount.class.getSimpleName());
    job.setJarByClass(WordCount.class);

    job.setNumReduceTasks(args.numReducers);

    FileInputFormat.setInputPaths(job, new Path(args.input));
    FileOutputFormat.setOutputPath(job, new Path(args.output));

    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(IntWritable.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(IntWritable.class);
    job.setOutputFormatClass(TextOutputFormat.class);

    job.setMapperClass(args.imc ? MyMapperIMC.class : MyMapper.class);
    job.setCombinerClass(MyReducer.class);
    job.setReducerClass(MyReducer.class);

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

    long startTime = System.currentTimeMillis();
    job.waitForCompletion(true);
    LOG.info("Job Finished in " + (System.currentTimeMillis() - startTime) / 1000.0 + " seconds");

    return 0;
}

---

From source file:ca.uwaterloo.cs.bigdata2017w.assignment4.BuildPersonalizedPageRankRecords.java

License:Apache License

/**
 * Runs this tool.//from w  w w .  j  a  v  a2s . c o  m
 */
@SuppressWarnings({ "static-access" })
public int run(String[] args) throws Exception {
    Options options = new Options();

    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input path").create(INPUT));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output path").create(OUTPUT));
    options.addOption(
            OptionBuilder.withArgName("num").hasArg().withDescription("number of nodes").create(NUM_NODES));
    options.addOption(
            OptionBuilder.withArgName("sources").hasArg().withDescription("source nodes").create(SOURCES));

    CommandLine cmdline;
    CommandLineParser parser = new GnuParser();

    try {
        cmdline = parser.parse(options, args);
    } catch (ParseException exp) {
        System.err.println("Error parsing command line: " + exp.getMessage());
        return -1;
    }

    if (!cmdline.hasOption(INPUT) || !cmdline.hasOption(OUTPUT) || !cmdline.hasOption(NUM_NODES)) {
        System.out.println("args: " + Arrays.toString(args));
        HelpFormatter formatter = new HelpFormatter();
        formatter.setWidth(120);
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    String inputPath = cmdline.getOptionValue(INPUT);
    String outputPath = cmdline.getOptionValue(OUTPUT);
    int n = Integer.parseInt(cmdline.getOptionValue(NUM_NODES));
    String sourcesString = cmdline.getOptionValue(SOURCES);
    String[] sources = sourcesString.split(",");
    for (int i = 0; i < sources.length; i++) {
        sources[i] = sources[i].trim();
    }

    LOG.info("Tool name: " + BuildPersonalizedPageRankRecords.class.getSimpleName());
    LOG.info(" - inputDir: " + inputPath);
    LOG.info(" - outputDir: " + outputPath);
    LOG.info(" - numNodes: " + n);
    LOG.info(" - use sources: " + sourcesString);

    Configuration conf = getConf();
    conf.setInt(NODE_CNT_FIELD, n);
    conf.setInt("mapred.min.split.size", 1024 * 1024 * 1024);
    conf.setStrings(SOURCES, sources);

    Job job = Job.getInstance(conf);
    job.setJobName(BuildPersonalizedPageRankRecords.class.getSimpleName() + ":" + inputPath);
    job.setJarByClass(BuildPersonalizedPageRankRecords.class);

    job.setNumReduceTasks(0);

    FileInputFormat.addInputPath(job, new Path(inputPath));
    FileOutputFormat.setOutputPath(job, new Path(outputPath));

    job.setInputFormatClass(TextInputFormat.class);
    job.setOutputFormatClass(SequenceFileOutputFormat.class);

    job.setMapOutputKeyClass(IntWritable.class);
    job.setMapOutputValueClass(PageRankNode.class);

    job.setOutputKeyClass(IntWritable.class);
    job.setOutputValueClass(PageRankNode.class);

    job.setMapperClass(MyMapper.class);

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

    job.waitForCompletion(true);

    return 0;
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19
• 20
• 21
• 22
• 23
• 24
• 25
• 26
• 27
• 28
• 29
• 30
• 31
• 32
• 33
• 34
• 35
• 36
• 37
• 38
• 39
• 40
• 41
• 42
• 43
• 44
• 45
• 46
• 47
• 48
• 49
• 50
• »