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

Introduction

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

Prototype

public void setMemoryForMapTask(long mem) 

Source Link

Usage

From source file:de.tudarmstadt.lt.n2n.hadoop.FlipJoBims.java

License:Apache License

public static void main(String[] args) throws Exception {

    JobConf conf = new JobConf(FlipJoBims.class);

    /* begin necessary for UKP cluster */
    conf.setMemoryForMapTask(1000L); // 1 GB /* necessary for UKP cdh3 */
    conf.setMemoryForReduceTask(1000L); // 1 GB /* necessary for UKP cdh3 */
    FileOutputFormat.setCompressOutput(conf, true); // compress output
    FileOutputFormat.setOutputCompressorClass(conf,
            org.apache.hadoop.io.compress.BZip2Codec.class); /* use the bzip2 codec for compression */
    conf.setCompressMapOutput(true); // compress mapper output
    /* end necessary for UKP cluster */

    conf.setJobName(FlipJoBims.class.getSimpleName());
    args = new GenericOptionsParser(conf, args).getRemainingArgs();

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

    conf.setMapperClass(FlipJoBims.Map.class);
    conf.setNumReduceTasks(0);/*w w  w . j  a  v a2  s.c o m*/
    // conf.setReducerClass(IdentityReducer.class);

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

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

    FileInputFormat.setInputPaths(conf, new Path(args[0]));
    FileOutputFormat.setOutputPath(conf, new Path(args[1]));

    JobClient.runJob(conf);

}

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From source file:de.tudarmstadt.lt.n2n.hadoop.pipetests.GoogleSyntacticsJob5.java

License:Apache License

@Override
public void configure(JobConf job) {
    String extractorConfigurationFiles = job.get(SHARED_CONSTANTS.PARAM_EXTRACTORCONFIGS);
    if (extractorConfigurationFiles == null) {
        extractorConfigurationFiles = StringUtils.join(SHARED_CONSTANTS.DEFAULT_EXTRACTOR_CONFIGURATIONS, ',');
        System.out.format("Extractorconfigurationfile parameter not set. Assuming -D%s=%s %n",
                SHARED_CONSTANTS.PARAM_EXTRACTORCONFIGS, extractorConfigurationFiles);
        job.set(SHARED_CONSTANTS.PARAM_EXTRACTORCONFIGS, extractorConfigurationFiles);
    }// ww w  .  j  a  v  a2 s. c  om
    try {
        String[] extractorConfigurationFilesArr = extractorConfigurationFiles.split(",");
        for (int i = 0; i < extractorConfigurationFilesArr.length; i++)
            DistributedCache.addFileToClassPath(new Path(extractorConfigurationFilesArr[i]), job);
    } catch (IOException e) {
        e.printStackTrace();
    }
    Text2CASInputFormat.setDocumentTextExtractorClass(job, KeyPlusValueAsDocumentExtractor.class);
    job.setMapperClass(JoBimMapper.class);
    job.setReducerClass(JoBimReducer.class);
    job.setOutputFormat(TextOutputFormat.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(NullWritable.class);
    job.setMemoryForMapTask(4096);
    job.setMemoryForReduceTask(4096);
    job.set("mapred.child.java.opts", "-Xmx4096m");
    job.setNumReduceTasks(1); // reset to default
}

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