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

List of usage examples for org.apache.hadoop.mapred JobConf setJobName

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Introduction

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

Prototype

public void setJobName(String name)

Source Link

Document

Set the user-specified job name.

Usage

From source file:edu.umd.cloud9.collection.spinn3r.DemoCountSpinn3rEnglishPosts.java

License:Apache License

/**
 * Runs this tool./*from w w w  .ja v  a2s  .co m*/
 */
public int run(String[] args) throws Exception {
    if (args.length != 2) {
        printUsage();
        return -1;
    }

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

    sLogger.info("input dir: " + inputPath);
    sLogger.info("output dir: " + outputPath);

    JobConf conf = new JobConf(DemoCountSpinn3rEnglishPosts.class);
    conf.setJobName("DemoCountSpinn3rEnglishPosts");

    conf.setNumReduceTasks(0);

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

    conf.setInputFormat(Spinn3rItemInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);

    conf.setMapperClass(MyMapper.class);

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

    JobClient.runJob(conf);

    // clean up
    FileSystem.get(conf).delete(new Path(outputPath), true);

    return 0;
}

From source file:edu.umd.cloud9.collection.trec.BuildTrecForwardIndex.java

License:Apache License

/**
 * Runs this tool./* w  ww. ja  v a 2 s.c o  m*/
 */
public int run(String[] args) throws Exception {
    if (args.length != 4) {
        printUsage();
        return -1;
    }

    JobConf conf = new JobConf(getConf(), BuildTrecForwardIndex.class);
    FileSystem fs = FileSystem.get(getConf());

    String collectionPath = args[0];
    String outputPath = args[1];
    String indexFile = args[2];
    String mappingFile = args[3];

    LOG.info("Tool name: " + BuildTrecForwardIndex.class.getCanonicalName());
    LOG.info(" - collection path: " + collectionPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - index file: " + indexFile);
    LOG.info(" - mapping file: " + mappingFile);

    conf.setJobName(BuildTrecForwardIndex.class.getSimpleName());

    conf.set("mapred.child.java.opts", "-Xmx1024m");
    conf.setNumReduceTasks(1);

    if (conf.get("mapred.job.tracker").equals("local")) {
        conf.set(DOCNO_MAPPING_FILE_PROPERTY, mappingFile);
    } else {
        DistributedCache.addCacheFile(new URI(mappingFile), conf);
    }

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

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

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(IdentityReducer.class);

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

    RunningJob job = JobClient.runJob(conf);

    Counters counters = job.getCounters();
    int numDocs = (int) counters.findCounter(Count.DOCS).getCounter();

    String inputFile = outputPath + "/" + "part-00000";

    LOG.info("Writing " + numDocs + " doc offseta to " + indexFile);
    FSLineReader reader = new FSLineReader(inputFile, fs);

    FSDataOutputStream writer = fs.create(new Path(indexFile), true);

    writer.writeUTF(edu.umd.cloud9.collection.trec.TrecForwardIndex.class.getCanonicalName());
    writer.writeUTF(collectionPath);
    writer.writeInt(numDocs);

    int cnt = 0;
    Text line = new Text();
    while (reader.readLine(line) > 0) {
        String[] arr = line.toString().split("\\t");
        long offset = Long.parseLong(arr[1]);
        int len = Integer.parseInt(arr[2]);

        writer.writeLong(offset);
        writer.writeInt(len);

        cnt++;
        if (cnt % 100000 == 0) {
            LOG.info(cnt + " docs");
        }
    }
    reader.close();
    writer.close();
    LOG.info(cnt + " docs total. Done!");

    if (numDocs != cnt) {
        throw new RuntimeException("Unexpected number of documents in building forward index!");
    }

    return 0;
}

From source file:edu.umd.cloud9.collection.trec.DemoCountTrecDocuments.java

License:Apache License

/**
 * Runs this tool.//from w  w  w  . j  av a 2s.c om
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String inputPath = args[0];
    String outputPath = args[1];
    String mappingFile = args[2];

    LOG.info("Tool: " + DemoCountTrecDocuments.class.getCanonicalName());
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output dir: " + outputPath);
    LOG.info(" - docno mapping file: " + mappingFile);

    JobConf conf = new JobConf(getConf(), DemoCountTrecDocuments.class);
    conf.setJobName(DemoCountTrecDocuments.class.getSimpleName());

    conf.setNumReduceTasks(0);

    // Pass in the class name as a String; this is makes the mapper general in being able to load
    // any collection of Indexable objects that has docid/docno mapping specified by a DocnoMapping
    // object.
    conf.set("DocnoMappingClass", edu.umd.cloud9.collection.trec.TrecDocnoMapping.class.getCanonicalName());

    // Put the mapping file in the distributed cache so each map worker will have it.
    DistributedCache.addCacheFile(new URI(mappingFile), conf);

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

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

    conf.setMapperClass(MyMapper.class);

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

    JobClient.runJob(conf);

    return 0;
}

From source file:edu.umd.cloud9.collection.trec.NumberTrecDocuments.java

License:Apache License

/**
 * Runs this tool.//  w w  w .  j a  va  2 s. c o  m
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String inputPath = args[0];
    String outputPath = args[1];
    String outputFile = args[2];

    LOG.info("Tool: " + NumberTrecDocuments.class.getCanonicalName());
    LOG.info(" - Input path: " + inputPath);
    LOG.info(" - Output path: " + outputPath);
    LOG.info(" - Output file: " + outputFile);

    JobConf conf = new JobConf(getConf(), NumberTrecDocuments.class);
    conf.setJobName(NumberTrecDocuments.class.getSimpleName());

    conf.setNumMapTasks(100); // Arbitrary number; doesn't matter.
    conf.setNumReduceTasks(1);

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

    conf.setInputFormat(TrecDocumentInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);
    conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(MyReducer.class);

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

    JobClient.runJob(conf);

    String input = outputPath + (outputPath.endsWith("/") ? "" : "/") + "/part-00000";
    TrecDocnoMapping.writeMappingData(new Path(input), new Path(outputFile), FileSystem.get(getConf()));

    return 0;
}

From source file:edu.umd.cloud9.collection.trecweb.NumberTrecWebDocuments.java

License:Apache License

public int run(String[] args) throws Exception {
    if (args.length != 4) {
        System.out.println("usage: [input] [output-dir] [output-file] [num-mappers]");
        System.exit(-1);//from w ww .  j  a  v  a  2 s.  c  om
    }

    String inputPath = args[0];
    String outputPath = args[1];
    String outputFile = args[2];
    int mapTasks = Integer.parseInt(args[3]);

    LOG.info("Tool name: " + NumberTrecWebDocuments.class.getCanonicalName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - output file: " + outputFile);
    LOG.info(" - number of mappers: " + mapTasks);

    JobConf conf = new JobConf(getConf(), NumberTrecWebDocuments.class);
    conf.setJobName(NumberTrecWebDocuments.class.getSimpleName());

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(1);

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

    conf.setInputFormat(SequenceFileInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(IntWritable.class);
    conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(MyReducer.class);

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

    JobClient.runJob(conf);

    writeMappingData(new Path(outputPath + "/part-00000"), new Path(outputFile), FileSystem.get(conf));

    return 0;
}

From source file:edu.umd.cloud9.collection.trecweb.RepackGov2Documents.java

License:Apache License

/**
 * Runs this tool./*ww  w  .ja v a 2 s.c  om*/
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String basePath = args[0];
    String outputPath = args[1];
    String compressionType = args[2];

    if (!compressionType.equals("block") && !compressionType.equals("record")
            && !compressionType.equals("none")) {
        System.err.println("Error: \"" + compressionType + "\" unknown compression type!");
        System.exit(-1);
    }

    // this is the default block size
    int blocksize = 1000000;

    JobConf conf = new JobConf(RepackGov2Documents.class);
    conf.setJobName("RepackGov2Documents");

    sLogger.info("Tool name: RepackGov2Documents");
    sLogger.info(" - base path: " + basePath);
    sLogger.info(" - output path: " + outputPath);
    sLogger.info(" - compression type: " + compressionType);

    if (compressionType.equals("block")) {
        sLogger.info(" - block size: " + blocksize);
    }

    int mapTasks = 10;

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(500);

    // 272
    for (int i = 0; i <= 272; i++) {
        String path = basePath + "/GX";
        String indexNum = Integer.toString(i);
        if (indexNum.length() == 1) {
            path += "00";
        }
        if (indexNum.length() == 2) {
            path += "0";
        }
        path += indexNum;
        FileInputFormat.addInputPath(conf, new Path(path));
    }

    SequenceFileOutputFormat.setOutputPath(conf, new Path(outputPath));

    if (compressionType.equals("none")) {
        SequenceFileOutputFormat.setCompressOutput(conf, false);
    } else {
        SequenceFileOutputFormat.setCompressOutput(conf, true);

        if (compressionType.equals("record")) {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.RECORD);
        } else {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.BLOCK);
            conf.setInt("io.seqfile.compress.blocksize", blocksize);
        }
    }

    conf.setInputFormat(TrecWebDocumentInputFormat.class);
    conf.setOutputFormat(SequenceFileOutputFormat.class);
    conf.setOutputKeyClass(LongWritable.class);
    conf.setOutputValueClass(TrecWebDocument.class);

    conf.setMapperClass(MyMapper.class);

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

    JobClient.runJob(conf);

    return 0;
}

From source file:edu.umd.cloud9.collection.trecweb.RepackWt10gDocuments.java

License:Apache License

/**
 * Runs this tool.// w  w  w . jav a  2s  . co m
 */
public int run(String[] args) throws Exception {
    if (args.length != 3) {
        printUsage();
        return -1;
    }

    String basePath = args[0];
    String outputPath = args[1];
    String compressionType = args[2];

    if (!compressionType.equals("block") && !compressionType.equals("record")
            && !compressionType.equals("none")) {
        System.err.println("Error: \"" + compressionType + "\" unknown compression type!");
        System.exit(-1);
    }

    // this is the default block size
    int blocksize = 1000000;

    JobConf conf = new JobConf(RepackWt10gDocuments.class);
    conf.setJobName("RepackWt10gDocuments");

    sLogger.info("Tool name: RepackWt10gDocuments");
    sLogger.info(" - base path: " + basePath);
    sLogger.info(" - output path: " + outputPath);
    sLogger.info(" - compression type: " + compressionType);

    if (compressionType.equals("block")) {
        sLogger.info(" - block size: " + blocksize);
    }

    int mapTasks = 10;

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(50);

    for (int i = 1; i <= 104; i++) {
        String path = basePath + "/WTX";
        String indexNum = Integer.toString(i);
        if (indexNum.length() == 1) {
            path += "00";
        }
        if (indexNum.length() == 2) {
            path += "0";
        }
        path += indexNum;
        FileInputFormat.addInputPath(conf, new Path(path));
    }

    SequenceFileOutputFormat.setOutputPath(conf, new Path(outputPath));

    if (compressionType.equals("none")) {
        SequenceFileOutputFormat.setCompressOutput(conf, false);
    } else {
        SequenceFileOutputFormat.setCompressOutput(conf, true);

        if (compressionType.equals("record")) {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.RECORD);
        } else {
            SequenceFileOutputFormat.setOutputCompressionType(conf, SequenceFile.CompressionType.BLOCK);
            conf.setInt("io.seqfile.compress.blocksize", blocksize);
        }
    }

    conf.setInputFormat(TrecWebDocumentInputFormat.class);
    conf.setOutputFormat(SequenceFileOutputFormat.class);
    conf.setOutputKeyClass(LongWritable.class);
    conf.setOutputValueClass(TrecWebDocument.class);

    conf.setMapperClass(MyMapper.class);

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

    JobClient.runJob(conf);

    return 0;
}

From source file:edu.umd.cloud9.collection.wikipedia.BuildWikipediaDocnoMapping.java

License:Apache License

@SuppressWarnings("static-access")
@Override//w  ww  .ja  v a  2  s.c o  m
public int run(String[] args) throws Exception {
    Options options = new Options();
    options.addOption(
            OptionBuilder.withArgName("path").hasArg().withDescription("XML dump file").create(INPUT_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("tmp output directory")
            .create(OUTPUT_PATH_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("output file")
            .create(OUTPUT_FILE_OPTION));
    options.addOption(OptionBuilder.withArgName("en|sv|de|cs|es|zh|ar|tr").hasArg()
            .withDescription("two-letter language code").create(LANGUAGE_OPTION));
    options.addOption(KEEP_ALL_OPTION, false, "keep all pages");

    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_OPTION) || !cmdline.hasOption(OUTPUT_PATH_OPTION)
            || !cmdline.hasOption(OUTPUT_FILE_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    String language = null;
    if (cmdline.hasOption(LANGUAGE_OPTION)) {
        language = cmdline.getOptionValue(LANGUAGE_OPTION);
        if (language.length() != 2) {
            System.err.println("Error: \"" + language + "\" unknown language!");
            return -1;
        }
    }

    String inputPath = cmdline.getOptionValue(INPUT_OPTION);
    String outputPath = cmdline.getOptionValue(OUTPUT_PATH_OPTION);
    String outputFile = cmdline.getOptionValue(OUTPUT_FILE_OPTION);
    boolean keepAll = cmdline.hasOption(KEEP_ALL_OPTION);

    LOG.info("Tool name: " + this.getClass().getName());
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - output file: " + outputFile);
    LOG.info(" - keep all pages: " + keepAll);
    LOG.info(" - language: " + language);

    JobConf conf = new JobConf(getConf(), BuildWikipediaDocnoMapping.class);
    conf.setJobName(String.format("BuildWikipediaDocnoMapping[%s: %s, %s: %s, %s: %s]", INPUT_OPTION, inputPath,
            OUTPUT_FILE_OPTION, outputFile, LANGUAGE_OPTION, language));

    conf.setBoolean(KEEP_ALL_OPTION, keepAll);
    if (language != null) {
        conf.set("wiki.language", language);
    }
    conf.setNumReduceTasks(1);

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

    conf.setInputFormat(WikipediaPageInputFormat.class);
    conf.setOutputKeyClass(IntWritable.class);
    conf.setOutputValueClass(IntWritable.class);
    conf.setOutputFormat(TextOutputFormat.class);

    conf.setMapperClass(MyMapper.class);
    conf.setReducerClass(MyReducer.class);

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

    RunningJob job = JobClient.runJob(conf);
    Counters c = job.getCounters();
    long cnt = keepAll ? c.getCounter(PageTypes.TOTAL) : c.getCounter(PageTypes.ARTICLE);

    WikipediaDocnoMapping.writeDocnoMappingData(FileSystem.get(conf), outputPath + "/part-00000", (int) cnt,
            outputFile);

    return 0;
}

From source file:edu.umd.cloud9.collection.wikipedia.BuildWikipediaForwardIndex.java

License:Apache License

@SuppressWarnings("static-access")
@Override//from w  w  w. j  a v  a 2  s.  co m
public int run(String[] args) throws Exception {
    Options options = new Options();
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("input").create(INPUT_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("tmp output directory")
            .create(OUTPUT_OPTION));
    options.addOption(
            OptionBuilder.withArgName("path").hasArg().withDescription("index file").create(INDEX_FILE_OPTION));
    options.addOption(OptionBuilder.withArgName("en|sv|de|cs|es|zh|ar|tr").hasArg()
            .withDescription("two-letter language code").create(LANGUAGE_OPTION));

    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_OPTION) || !cmdline.hasOption(OUTPUT_OPTION)
            || !cmdline.hasOption(INDEX_FILE_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

    Path inputPath = new Path(cmdline.getOptionValue(INPUT_OPTION));
    String outputPath = cmdline.getOptionValue(OUTPUT_OPTION);
    String indexFile = cmdline.getOptionValue(INDEX_FILE_OPTION);

    if (!inputPath.isAbsolute()) {
        System.err.println("Error: " + INPUT_OPTION + " must be an absolute path!");
        return -1;
    }

    String language = null;
    if (cmdline.hasOption(LANGUAGE_OPTION)) {
        language = cmdline.getOptionValue(LANGUAGE_OPTION);
        if (language.length() != 2) {
            System.err.println("Error: \"" + language + "\" unknown language!");
            return -1;
        }
    }

    JobConf conf = new JobConf(getConf(), BuildWikipediaForwardIndex.class);
    FileSystem fs = FileSystem.get(conf);

    LOG.info("Tool name: " + this.getClass().getName());
    LOG.info(" - input path: " + inputPath);
    LOG.info(" - output path: " + outputPath);
    LOG.info(" - index file: " + indexFile);
    LOG.info("Note: This tool only works on block-compressed SequenceFiles!");
    LOG.info(" - language: " + language);

    conf.setJobName(String.format("BuildWikipediaForwardIndex[%s: %s, %s: %s, %s: %s]", INPUT_OPTION, inputPath,
            INDEX_FILE_OPTION, indexFile, LANGUAGE_OPTION, language));

    conf.setNumReduceTasks(1);

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

    if (language != null) {
        conf.set("wiki.language", language);
    }

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

    conf.setMapRunnerClass(MyMapRunner.class);
    conf.setReducerClass(IdentityReducer.class);

    // delete the output directory if it exists already
    fs.delete(new Path(outputPath), true);

    RunningJob job = JobClient.runJob(conf);

    Counters counters = job.getCounters();
    int blocks = (int) counters.getCounter(Blocks.Total);

    LOG.info("number of blocks: " + blocks);

    LOG.info("Writing index file...");
    LineReader reader = new LineReader(fs.open(new Path(outputPath + "/part-00000")));
    FSDataOutputStream out = fs.create(new Path(indexFile), true);

    out.writeUTF("edu.umd.cloud9.collection.wikipedia.WikipediaForwardIndex");
    out.writeUTF(inputPath.toString());
    out.writeInt(blocks);

    int cnt = 0;
    Text line = new Text();
    while (reader.readLine(line) > 0) {
        String[] arr = line.toString().split("\\s+");

        int docno = Integer.parseInt(arr[0]);
        int offset = Integer.parseInt(arr[1]);
        short fileno = Short.parseShort(arr[2]);

        out.writeInt(docno);
        out.writeInt(offset);
        out.writeShort(fileno);

        cnt++;

        if (cnt % 100000 == 0) {
            LOG.info(cnt + " blocks written");
        }
    }

    reader.close();
    out.close();

    if (cnt != blocks) {
        throw new RuntimeException("Error: mismatch in block count!");
    }

    return 0;
}

From source file:edu.umd.cloud9.collection.wikipedia.BuildWikipediaLinkGraph.java

License:Apache License

private void task1(String inputPath, String outputPath, int partitions) throws IOException {
    LOG.info("Exracting edges...");
    LOG.info(" - input: " + inputPath);
    LOG.info(" - output: " + outputPath);

    JobConf conf = new JobConf(getConf(), BuildWikipediaLinkGraph.class);
    conf.setJobName(String.format("BuildWikipediaLinkGraph:Edges[input: %s, output: %s, num_partitions: %d]",
            inputPath, outputPath, partitions));

    conf.setNumReduceTasks(partitions);// ww w . j  av  a 2 s . co  m

    SequenceFileInputFormat.addInputPath(conf, new Path(inputPath));
    TextOutputFormat.setOutputPath(conf, new Path(outputPath));

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

    conf.setMapOutputKeyClass(PairOfStringInt.class);
    conf.setMapOutputValueClass(Text.class);

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

    conf.setMapperClass(MyMapper1.class);
    conf.setReducerClass(MyReducer1.class);
    conf.setPartitionerClass(MyPartitioner1.class);

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

    JobClient.runJob(conf);
}