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

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

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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:edu.ucsb.cs.partitioning.cosine.CosinePartitioning.java

License:Apache License

/**
 * Sets MapReduce input configurations for the core cosine partitioning job.
 *//*from ww w.  j a va 2  s .  c  o  m*/
public static JobConf setMapReduce(JobConf job, Class mapper, Class reducer) {
    job.setMapperClass(mapper);
    job.setMapOutputKeyClass(IntIntWritable.class);
    job.setMapOutputValueClass(IdFeatureWeightArrayWritable.class);
    job.setNumReduceTasks(job.getInt(Config.NUM_PARTITIONS_PROPERTY, Config.NUM_PARTITIONS_VALUE));
    job.setReducerClass(reducer);
    job.setOutputKeyClass(IntIntWritable.class);
    job.setOutputValueClass(IdFeatureWeightArrayWritable.class);
    return job;
}

From source file:edu.ucsb.cs.partitioning.lsh.LshPartitionMain.java

License:Apache License

public static void main(String args[]) throws ParseException, IOException {

    JobConf job = new JobConf();
    job.setJarByClass(LshPartitionMain.class);
    job.setJobName(LshPartitionMain.class.getSimpleName());
    GenericOptionsParser gop = new GenericOptionsParser(job, args);
    args = gop.getRemainingArgs();/*from ww  w  .j  av  a 2 s  . c om*/

    job.setMapperClass(LshMapper.class);
    job.setMapOutputKeyClass(IntArrayWritable.class); // signatures
    job.setMapOutputValueClass(LongWritable.class); // doc IDs
    job.setNumReduceTasks(job.getInt(NUM_REDUCERS_PROPERTY, NUM_REDUCERS_VALUE));
    job.setReducerClass(LshReducer.class);
    job.setOutputKeyClass(IntWritable.class);
    job.setOutputValueClass(Text.class);

    String inputDir = args[0];
    if (inputDir == null) {
        throw new UnsupportedOperationException("ERROR: input directory not set.");
    }
    FileInputFormat.addInputPath(job, new Path(inputDir));
    Path outputPath = new Path("lsh-jaccard-buckets");
    FileOutputFormat.setOutputPath(job, outputPath);
    FileSystem.get(job).delete(outputPath, true);

    LshTable lshTable = new LshTable(job.getInt(K_PROPERTY, K_VALUE), job.getInt(L_PROPERTY, L_VALUE), 1024,
            job.getLong(NUM_FEATURES_PROPERTY, NUM_FEATURES_VALUE),
            job.getFloat(THRESHOLD_PROPERTY, THRESHOLD_VALUE));

    writeLsh(job, outputPath.getFileSystem(job), lshTable);

    run(job);

}

From source file:edu.ucsb.cs.preprocessing.sequence.SeqWriter.java

License:Apache License

/**
 * Runs a MR job with maps only to convert input directory of numeric valued
 * records to hadoop sequence format. It assumes a text input of format of
 * [id feature weight ..] to be the format of input.
 *//*from www  .  j ava 2s.c o  m*/
public static void writeSequence() throws IOException {

    JobConf job = new JobConf();
    job.setJobName("Convert text vectors to hadoop seqeunce ");
    job.setJarByClass(SeqWriter.class);

    job.setMapperClass(SeqMapper.class);
    job.setNumReduceTasks(0);
    job.setMapOutputKeyClass(LongWritable.class);
    job.setMapOutputValueClass(FeatureWeightArrayWritable.class);
    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(FeatureWeightArrayWritable.class);

    job.setInputFormat(TextInputFormat.class);
    TextInputFormat.addInputPath(job, new Path(INPUT_DIR));
    FileSystem.get(job).delete(new Path(HashPagesDriver.IDS_FILE2), true);
    Path outputPath = new Path(OUTPUT_DIR);
    FileSystem.get(job).delete(outputPath, true);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    SequenceFileOutputFormat.setOutputPath(job, outputPath);

    JobSubmitter.run(job, "PREPROCESS", -1);
}

From source file:edu.ucsb.cs.sort.length.LengthSortMain.java

License:Apache License

/**
 * Sets the job configurations including the mapper and reducer classes to
 * do the sorting based on vector lengths.
 *///from   ww  w  .  j  av  a 2  s  .  com
public static void main(String[] args) throws IOException {

    JobConf job = new JobConf();
    new GenericOptionsParser(job, args);
    job.setJobName(LengthSortMain.class.getSimpleName());
    job.setJarByClass(LengthSortMain.class);
    job.setMapperClass(LengthSortMapper.class);
    job.setMapOutputKeyClass(FloatWritable.class);
    job.setMapOutputValueClass(IdFeatureWeightArrayWritable.class);

    job.setPartitionerClass(LengthRangePartitioner.class);

    job.setReducerClass(LengthSortReducer.class);
    job.setNumReduceTasks(job.getInt(SortDriver.NUM_REDUCE_PROPERTY, SortDriver.NUM_REDUCE_VALUE));
    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(FeatureWeightArrayWritable.class);
    //
    // set input & output
    //
    String inputDir = SortDriver.INPUT_DIR;
    if (inputDir == null) {
        throw new UnsupportedOperationException("ERROR: input path not set");
    }
    job.setInputFormat(SequenceFileInputFormat.class);
    SequenceFileInputFormat.addInputPath(job, new Path(inputDir));
    Path outputPath = new Path(SortDriver.OUTPUT_DIR);
    FileSystem.get(job).delete(outputPath, true);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    FileOutputFormat.setOutputPath(job, outputPath);

    //
    // run
    //
    JobSubmitter.run(job, "Sort By Vector Lenghts", -1);
}

From source file:edu.ucsb.cs.sort.maxw.MaxwSortMain.java

License:Apache License

/**
 * Main method sets the job configurations including the mapper and reducer
 * classes to do the sorting./*  w  w  w.j  av a 2 s. co m*/
 */
public static void main(String[] args) throws IOException {

    JobConf job = new JobConf();
    new GenericOptionsParser(job, args);
    // ToolRunner.printGenericCommandUsage(System.out);
    job.setJobName(MaxwSortMain.class.getSimpleName());
    job.setJarByClass(MaxwSortMain.class);
    job.setMapperClass(MaxwSortMapper.class);
    job.setMapOutputKeyClass(FloatWritable.class);
    job.setMapOutputValueClass(IdFeatureWeightArrayWritable.class);

    job.setPartitionerClass(MaxwRangePartitioner.class);

    job.setReducerClass(MaxwSortReducer.class);
    job.setNumReduceTasks(job.getInt(SortDriver.NUM_REDUCE_PROPERTY, SortDriver.NUM_REDUCE_VALUE));
    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(FeatureWeightArrayWritable.class);
    //
    // set input & output
    //
    String inputDir = SortDriver.INPUT_DIR;
    if (inputDir == null) {
        throw new UnsupportedOperationException("ERROR: input path not set");
    }
    job.setInputFormat(SequenceFileInputFormat.class);
    SequenceFileInputFormat.addInputPath(job, new Path(inputDir));
    Path outputPath = new Path(SortDriver.OUTPUT_DIR);
    FileSystem.get(job).delete(outputPath, true);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    FileOutputFormat.setOutputPath(job, outputPath);
    //
    // run
    //
    JobSubmitter.run(job, "Sort By infinity-Norm", -1);
}

From source file:edu.ucsb.cs.sort.norm.NormSortMain.java

License:Apache License

/**
 * Main method sets the job configurations including the mapper and reducer
 * classes to do the sorting. Some of the produced partitions might be
 * merged later to reflect the number of partitions chosen by the user.
 *//*  w ww  .  j  a  v a2  s. co m*/
public static void main(String[] args) throws IOException {

    JobConf job = new JobConf();
    new GenericOptionsParser(job, args);
    job.setJobName("NormSort");
    job.setJarByClass(NormSortMain.class);
    job.setMapperClass(NormSortMapper.class);
    job.setMapOutputKeyClass(FloatWritable.class);
    job.setMapOutputValueClass(IdFeatureWeightArrayWritable.class);

    job.setPartitionerClass(NormRangePartitioner.class);

    job.setReducerClass(NormSortReducer.class);
    job.setNumReduceTasks(job.getInt(SortDriver.NUM_REDUCE_PROPERTY, SortDriver.NUM_REDUCE_VALUE));
    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(FeatureWeightArrayWritable.class);
    //
    // set input & output
    //
    String inputDir = SortDriver.INPUT_DIR;
    if (inputDir == null) {
        throw new UnsupportedOperationException("ERROR: input path not set");
    }
    job.setInputFormat(SequenceFileInputFormat.class);
    SequenceFileInputFormat.addInputPath(job, new Path(inputDir));
    Path outputPath = new Path(SortDriver.OUTPUT_DIR);
    FileSystem.get(job).delete(outputPath, true);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    FileOutputFormat.setOutputPath(job, outputPath);
    //
    // run
    //
    JobSubmitter.run(job, "Sort By p-norm", -1);
}

From source file:edu.ucsb.cs.sort.signature.SigSortMain.java

License:Apache License

/**
 * Sets the job configurations including the mapper and reducer classes to
 * do the sorting based signatures.//from w w w . jav a 2  s  .  c om
 */
public static void main(String[] args) throws IOException {

    JobConf job = new JobConf();
    new GenericOptionsParser(job, args);
    job.setJobName(SigSortMain.class.getSimpleName());
    job.setJarByClass(SigSortMain.class);
    job.setMapperClass(SigSortMapper.class);
    job.setMapOutputKeyClass(BitSignature.class);
    job.setMapOutputValueClass(LongWritable.class);

    job.setPartitionerClass(SigRangePartitioner.class);

    job.setReducerClass(SigSortReducer.class);
    job.setNumReduceTasks(job.getInt(SortDriver.NUM_REDUCE_PROPERTY, SortDriver.NUM_REDUCE_VALUE));
    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(BitSignature.class);
    //
    // set input & output
    //
    String inputDir = SortDriver.INPUT_DIR;
    if (inputDir == null) {
        throw new UnsupportedOperationException("ERROR: input path not set");
    }
    job.setInputFormat(SequenceFileInputFormat.class);
    SequenceFileInputFormat.addInputPath(job, new Path(inputDir));
    Path outputPath = new Path(OUTPUT_PATH);
    FileSystem.get(job).delete(outputPath, true);
    job.setOutputFormat(SequenceFileOutputFormat.class);
    FileOutputFormat.setOutputPath(job, outputPath);

    //
    // run
    //
    JobSubmitter.run(job, "Sort By Signature Bytes", -1);
}

From source file:edu.umd.cloud9.collection.aquaint2.DemoCountAquaint2Documents.java

License:Apache License

/**
 * Runs this tool.//from   w w w  . j  a  v a2 s .c  o m
 */
public int run(String[] args) throws Exception {
    if (args.length != 4) {
        printUsage();
        return -1;
    }

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

    System.out.println("input dir: " + inputPath);
    System.out.println("output dir: " + outputPath);
    System.out.println("mapping file: " + mappingFile);
    System.out.println("number of mappers: " + mapTasks);

    JobConf conf = new JobConf(DemoCountAquaint2Documents.class);
    conf.setJobName("DemoCountAquaint2Documents");

    conf.setNumMapTasks(mapTasks);
    conf.setNumReduceTasks(0);

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

    conf.setInputFormat(Aquaint2DocumentInputFormatOld.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.aquaint2.NumberAquaint2Documents.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];
    int mapTasks = 10;

    LOG.info("Tool: " + NumberAquaint2Documents.class.getCanonicalName());
    LOG.info(" - Input path: " + inputPath);
    LOG.info(" - Output path: " + outputPath);
    LOG.info(" - Output file: " + outputFile);

    JobConf conf = new JobConf(NumberAquaint2Documents.class);
    conf.setJobName(NumberAquaint2Documents.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(Aquaint2DocumentInputFormat.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);

    Aquaint2DocnoMapping.writeDocnoData(new Path(outputPath + "/part-00000"), new Path(outputFile),
            FileSystem.get(conf));

    return 0;
}

From source file:edu.umd.cloud9.collection.clue.ClueWarcForwardIndexBuilder.java

License:Apache License

/**
 * Runs this tool.//from ww  w .ja  va2  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("(required) collection path (must be block-compressed SequenceFiles)")
            .create(COLLECTION_OPTION));
    options.addOption(OptionBuilder.withArgName("path").hasArg().withDescription("(required) output index path")
            .create(INDEX_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(COLLECTION_OPTION) || !cmdline.hasOption(INDEX_OPTION)) {
        HelpFormatter formatter = new HelpFormatter();
        formatter.printHelp(this.getClass().getName(), options);
        ToolRunner.printGenericCommandUsage(System.out);
        return -1;
    }

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

    String collectionPath = cmdline.getOptionValue(COLLECTION_OPTION);
    String indexFile = cmdline.getOptionValue(INDEX_OPTION);

    LOG.info("Tool name: " + ClueWarcForwardIndexBuilder.class.getSimpleName());
    LOG.info(" - collection path: " + collectionPath);
    LOG.info(" - index file: " + indexFile);
    LOG.info("Note: This tool only works on block-compressed SequenceFiles!");

    Random random = new Random();
    Path outputPath = new Path(
            "tmp-" + ClueWarcForwardIndexBuilder.class.getSimpleName() + "-" + random.nextInt(10000));

    conf.setJobName(ClueWarcForwardIndexBuilder.class.getSimpleName() + ":" + collectionPath);

    conf.setNumMapTasks(100);
    conf.setNumReduceTasks(1);

    // Note, we have to add the files one by one, otherwise, SequenceFileInputFormat
    // thinks its a MapFile.
    for (FileStatus status : fs.listStatus(new Path(collectionPath))) {
        FileInputFormat.addInputPath(conf, status.getPath());
    }
    FileOutputFormat.setOutputPath(conf, outputPath);
    FileOutputFormat.setCompressOutput(conf, false);

    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(outputPath, true);

    RunningJob job = JobClient.runJob(conf);

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

    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(ClueWarcForwardIndex.class.getCanonicalName());
    out.writeUTF(collectionPath);
    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!");
    }

    fs.delete(outputPath, true);
    return 0;
}