Example usage for org.apache.hadoop.mapred Counters findCounter

Introduction

In this page you can find the example usage for org.apache.hadoop.mapred Counters findCounter.

Prototype

@Deprecated
public Counter findCounter(String group, int id, String name) 

Source Link

Document

Find a counter by using strings

Usage

From source file:edu.umd.cloud9.collection.medline.NumberMedlineCitations.java

License:Apache License

/**
 * Runs this tool./* ww  w . j  a  v a2s .co m*/
 */
public int run(String[] args) throws Exception {
    if (args.length != 4) {
        printUsage();
        return -1;
    }

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

    sLogger.info("Tool name: NumberMedlineCitations");
    sLogger.info(" - Input path: " + inputPath);
    sLogger.info(" - Output path: " + outputPath);
    sLogger.info(" - Output file: " + outputFile);
    sLogger.info("Launching with " + mapTasks + " mappers...");

    JobConf conf = new JobConf(getConf(), NumberMedlineCitations.class);
    conf.setJobName("NumberMedlineCitations");

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

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

    conf.setInputFormat(MedlineCitationInputFormat.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);

    // write out various properties
    Counters counters = job.getCounters();
    Counter counter = counters.findCounter("edu.umd.cloud9.collection.medline.NumberMedlineCitations$Citations",
            0, "");

    int numdocs = (int) counter.getCounter();
    sLogger.info("total number of docs: " + numdocs);

    MedlineDocnoMapping.writeDocidData(outputPath + "/part-00000", outputFile);

    return 0;
}

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From source file:ivory.core.index.MergeGlobalStatsAcrossIndexSegments.java

License:Apache License

public int runTool() throws Exception {

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

    String collectionName = conf.get("Ivory.CollectionName");
    String indexPaths = conf.get("Ivory.IndexPaths");
    String dataOutputPath = conf.get("Ivory.DataOutputPath");
    int dfThreshold = conf.getInt("Ivory.DfThreshold", 0);

    // first, compute size of global term space
    Path tmpPaths = new Path("/tmp/index-paths.txt");

    FSDataOutputStream out = fs.create(tmpPaths, true);
    for (String s : indexPaths.split(",")) {
        out.write(new String(s + "\n").getBytes());
    }//from  w  ww.j av  a  2s.  c  om
    out.close();

    LOG.info("Job: ComputeNumberOfTermsAcrossIndexSegments");
    conf.setJobName("ComputeNumberOfTermsAcrossIndexSegments:" + collectionName);

    FileInputFormat.addInputPath(conf, tmpPaths);

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

    conf.set("mapred.child.java.opts", "-Xmx2048m");

    conf.setInputFormat(NLineInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(PairOfIntLong.class);
    conf.setOutputFormat(NullOutputFormat.class);

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

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

    Counters counters = job.getCounters();

    long totalNumTerms = counters.findCounter("org.apache.hadoop.mapred.Task$Counter", 6, "REDUCE_INPUT_GROUPS")
            .getCounter();

    LOG.info("total number of terms in global dictionary = " + totalNumTerms);

    // now build the dictionary
    fs.delete(new Path(dataOutputPath), true);

    conf = new JobConf(getConf(), MergeGlobalStatsAcrossIndexSegments.class);

    LOG.info("Job: MergeGlobalStatsAcrossIndexSegments");
    conf.setJobName("MergeGlobalStatsAcrossIndexSegments:" + collectionName);

    FileInputFormat.addInputPath(conf, tmpPaths);

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

    conf.set("mapred.child.java.opts", "-Xmx2048m");

    conf.setInputFormat(NLineInputFormat.class);
    conf.setOutputKeyClass(Text.class);
    conf.setOutputValueClass(PairOfIntLong.class);
    conf.setOutputFormat(NullOutputFormat.class);

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

    conf.setLong("Ivory.IndexNumberOfTerms", (int) totalNumTerms);

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

    // compute some # docs, collection length, avg doc length
    long collectionLength = 0;
    int docCount = 0;
    for (String index : indexPaths.split(",")) {
        LOG.info("reading stats for " + index);

        RetrievalEnvironment env = new RetrievalEnvironment(index, fs);

        long l = env.readCollectionLength();
        int n = env.readCollectionDocumentCount();

        LOG.info(" - CollectionLength: " + l);
        LOG.info(" - CollectionDocumentCount: " + n);

        collectionLength += l;
        docCount += n;
    }

    float avgdl = (float) collectionLength / docCount;

    LOG.info("all index segments: ");
    LOG.info(" - CollectionLength: " + collectionLength);
    LOG.info(" - CollectionDocumentCount: " + docCount);
    LOG.info(" - AverageDocumentLenght: " + avgdl);

    RetrievalEnvironment env = new RetrievalEnvironment(dataOutputPath, fs);

    env.writeCollectionAverageDocumentLength(avgdl);
    env.writeCollectionLength(collectionLength);
    env.writeCollectionDocumentCount(docCount);

    return 0;
}

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