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

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

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Introduction

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

Prototype

public void setNumReduceTasks(int n)

Source Link

Document

Set the requisite number of reduce tasks for this job.

Usage

From source file:edu.yale.cs.hadoopdb.benchmark.SelectionTaskDB.java

License:Apache License

@Override
protected JobConf configureJob(String... args) throws Exception {

    JobConf conf = new JobConf(this.getClass());
    conf.setJobName("selection_db");

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

    conf.setMapperClass(Map.class);
    conf.setNumReduceTasks(0);

    if (args.length < 2) {
        throw new RuntimeException("Incorrect arguments provided for " + this.getClass());
    }//  w  w w  .j  a v a  2s.  c o m

    conf.set(PAGE_RANK_VALUE_PARAM, args[0]);

    // OUTPUT properties
    Path outputPath = new Path(args[1]);
    HDFSUtil.deletePath(outputPath);
    FileOutputFormat.setOutputPath(conf, outputPath);

    conf.set(DBConst.DB_RELATION_ID, "Rankings");
    conf.set(DBConst.DB_RECORD_READER, RankingsRecord.class.getName());
    conf.set(DBConst.DB_SQL_QUERY, "SELECT pageURL, pageRank FROM Rankings " + "WHERE pageRank > "
            + conf.get(PAGE_RANK_VALUE_PARAM) + ";");

    return conf;
}

From source file:edu.yale.cs.hadoopdb.benchmark.SelectionTaskHDFS.java

License:Apache License

@Override
protected JobConf configureJob(String... args) throws IOException {

    JobConf conf = new JobConf(getConf(), this.getClass());
    conf.setJobName("selection_hdfs");

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

    conf.setMapperClass(Map.class);
    conf.setNumReduceTasks(0);

    conf.setInputFormat(TextInputFormat.class);
    conf.setOutputFormat(TextOutputFormat.class);
    if (args.length < 3) {
        throw new RuntimeException("Incorrect arguments provided for " + this.getClass());
    }/* ww  w  .j  a  v a  2s  . c om*/

    conf.set(PAGE_RANK_VALUE_PARAM, args[0]);
    FileInputFormat.setInputPaths(conf, new Path(args[1]));

    // OUTPUT properties
    Path outputPath = new Path(args[2]);
    HDFSUtil.deletePath(outputPath);
    FileOutputFormat.setOutputPath(conf, outputPath);

    return conf;

}

From source file:edu.yale.cs.hadoopdb.dataloader.GlobalHasher.java

License:Apache License

@Override
protected JobConf configureJob(String... args) throws Exception {

    JobConf conf = new JobConf(getConf(), this.getClass());
    conf.setJobName("GlobalHasher");

    conf.setMapOutputKeyClass(UnsortableInt.class);
    conf.setMapOutputValueClass(Text.class);
    conf.setOutputKeyClass(NullWritable.class);
    conf.setOutputValueClass(Text.class);

    conf.setMapperClass(GlobalHasher.Map.class);
    conf.setReducerClass(GlobalHasher.Reduce.class);

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

    if (args.length < 5) {
        throw new RuntimeException("Incorrect arguments provided for " + this.getClass());
    }//from  w ww.  j  a  va2s .c  o m

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

    // OUTPUT properties
    Path outputPath = new Path(args[1]);
    HDFSUtil.deletePath(outputPath);
    FileOutputFormat.setOutputPath(conf, outputPath);

    int partNo = Integer.parseInt(args[2]);
    conf.setNumReduceTasks(partNo);

    conf.set(DELIMITER_PARAM, args[3]);

    int hashFieldPos = Integer.parseInt(args[4]);
    conf.setInt(HASH_FIELD_POS_PARAM, hashFieldPos);

    return conf;
}

From source file:eu.larkc.iris.Main.java

License:Apache License

private JobConf setupJob(Configuration conf) {
    JobConf jobConf = new JobConf(conf, Main.class);

    // run the job here.

    /* REAL CLUSTER */
    jobConf.set("dfs.blocksize", "536870912");
    jobConf.set("dfs.namenode.handler.count", "40");
    //jobConf.set("dfs.replication", "1");
    jobConf.set("mapreduce.reduce.shuffle.parallelcopies", "10");
    jobConf.set("mapreduce.task.io.sort.factor", "100");
    jobConf.set("mapreduce.task.io.sort.mb", "1024");
    jobConf.set("io.file.buffer.size", "131072");
    jobConf.set("mapred.child.java.opts", "-Xmx2560m");
    jobConf.set("mapred.child.ulimit", "4194304");
    jobConf.set("mapred.min.split.size", "536870912");
    jobConf.set("mapreduce.input.fileinputformat.split.minsize", "536870912");
    jobConf.set("mapreduce.reduce.merge.inmem.threshold", "0");
    /**///from   www . ja v a  2  s  .co m

    /* compression settings 
    jobConf.set("mapreduce.map.output.compress", "false");
    jobConf.set("mapreduce.output.fileoutputformat.compress", "true");
    jobConf.set("mapreduce.output.fileoutputformat.compression.type", "BLOCK");
     ~~~ */

    //!!!IMPORTANT, if not : Caused by: java.io.FileNotFoundException: File does not exist: hdfs://ec2-50-19-191-200.compute-1.amazonaws.com:8020/user/root/lubm/facts/lubm50/data
    jobConf.setBoolean("mapred.input.dir.recursive", true);

    jobConf.set("cascading.serialization.tokens",
            "130=eu.larkc.iris.storage.IRIWritable,131=eu.larkc.iris.storage.StringTermWritable");
    defaultConfiguration.flowProperties.put("cascading.serialization.tokens",
            "130=eu.larkc.iris.storage.IRIWritable,131=eu.larkc.iris.storage.StringTermWritable");

    /*
     if( System.getProperty("log4j.logger") != null )
        defaultConfiguration.flowProperties.put( "log4j.logger", System.getProperty("log4j.logger") );
    */

    //jobConf.set("mapred.min.split.size", "134217728");
    //jobConf.set("mapred.child.java.opts", "-Xms64m -Xmx512m");
    jobConf.setMapSpeculativeExecution(false);
    jobConf.setReduceSpeculativeExecution(false);

    //FIXME
    //jobConf.setNumMapTasks(8);
    jobConf.setNumReduceTasks(32);

    FlowConnector.setDebugLevel(defaultConfiguration.flowProperties, DebugLevel.VERBOSE);
    MultiMapReducePlanner.setJobConf(defaultConfiguration.flowProperties, jobConf);

    //Flow.setJobPollingInterval(defaultConfiguration.flowProperties, 500);

    return jobConf;
}

From source file:eu.scape_project.tb.chutney.ChutneyDriver.java

License:Apache License

/**
 * This method sets up and runs the job on Hadoop
 * @param args The passed through command line arguments
 *///  w ww  .ja  v a2s  .  c  om
public int run(String[] args) {

    CommandLineParser parser = new PosixParser();
    Options options = new Options();
    options.addOption("n", "jobname", true, "name to assign to the hadoop job");
    options.addOption("i", "inputlist", true,
            "text file containing list of input files (ensure no trailing carriage returns)");
    options.addOption("t", "jobtype", true,
            "type of job; CLJ (command line job), TSJ (Taverna Server job), TCL (Taverna command line job), XML (XML defined command line job), XWR (XML workflow report)");
    options.addOption("x", "xmlcode", true, "xml definition of job to run for XML jobs");
    options.addOption("h", "help", false, "help text");

    JobConf conf = new JobConf(ChutneyDriver.class);

    String input = null;
    String xmlcode = null;

    CommandLine com;
    try {
        com = parser.parse(options, args);
        if (com.hasOption("help")) {
            throw (new ParseException(""));
        }

        String jobName = Settings.JOB_NAME + "default";
        if (com.hasOption("jobname")) {
            //set the job name to something better than the default
            jobName = Settings.JOB_NAME + com.getOptionValue("jobname");
        }
        conf.setJobName(jobName);

        JobType jobType = JobType.CommandLineJob;
        if (com.hasOption("jobtype")) {
            String value = com.getOptionValue("jobtype").toUpperCase();
            if (value.equals(CommandLineJob.getShortJobType())) {
                jobType = CommandLineJob.getJobType();
            } else if (value.equals(TavernaCommandLineJob.getShortJobType())) {
                jobType = TavernaCommandLineJob.getJobType();
            } else if (value.equals(TavernaServerJob.getShortJobType())) {
                jobType = TavernaServerJob.getJobType();
            } else if (value.equals(XMLCommandLineJob.getShortJobType())) {
                jobType = XMLCommandLineJob.getJobType();
            } else if (value.equals(XMLWorkflowReport.getShortJobType())) {
                jobType = XMLWorkflowReport.getJobType();
            }
        }
        System.out.println("JobType: " + jobType.toString());
        conf.set(Settings.JOBTYPE_CONF_SETTING, jobType.toString());

        if (com.hasOption("xmlcode")) {
            //jobType == JobType.XMLCommandLineJob
            xmlcode = com.getOptionValue("xmlcode");
            //if it is a local file get the full path
            if (new File(xmlcode).exists())
                xmlcode = new File(xmlcode).getAbsolutePath();
            conf.set(Settings.XMLCODE_CONF_SETTING, xmlcode);
        }
        if ((jobType == JobType.XMLCommandLineJob) & (xmlcode == null)) {
            //i.e. no code specified
            System.out.println("No XML code specified on the command line");
            return -1;
        }

        if (com.hasOption("inputlist")) {
            input = com.getOptionValue("inputlist");
        }
        if (input.equals(null)) {
            System.out.println("no input given");
            return -2;
        }

    } catch (ParseException e) {
        HelpFormatter help = new HelpFormatter();
        help.printHelp("hadoop jar TavernaHadoopWrapper.jar", options);
        return -1;
    }

    //using matchbox it may take a while to process the jobs
    //set a longer timeout than the default (10 mins)
    //six hours should be more than enough :/        MMM*SS*MS
    //QAJob testing for 9 tests on ANJO files can take ~4.5hrs+
    conf.set("mapred.task.timeout", Integer.toString(360 * 60 * 1000));

    FileInputFormat.setInputPaths(conf, new Path(input));
    FileOutputFormat.setOutputPath(conf, new Path(conf.getJobName()));

    //set the mapper to this class' mapper
    conf.setMapperClass(Chutney.class);
    //we don't want to reduce
    //conf.setReducerClass(Reducer.class);

    //this input format should split the input by one line per map by default.
    conf.setInputFormat(NLineInputFormat.class);
    conf.setInt("mapred.line.input.format.linespermap", 1);

    //sets how the output is written cf. OutputFormat
    //we can use nulloutputformat if we are writing our own output
    conf.setOutputFormat(TextOutputFormat.class);

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

    //this sets maximum jvm reuse
    conf.set("mapred.job.reuse.jvm.num.tasks", "-1");

    //we only want one reduce task
    conf.setNumReduceTasks(1);

    try {
        JobClient.runJob(conf);
    } catch (IOException ioe) {
        ioe.printStackTrace();
        return -1;
    }

    return 0;
}

From source file:eu.stratosphere.myriad.driver.hadoop.MyriadDriverHadoopJob.java

License:Apache License

private JobConf createJobConf() {
    // create job
    JobConf conf = new JobConf(getConf());

    conf.setJarByClass(MyriadDriverHadoopJob.class);
    conf.setJobName(String.format("%s", this.parameters.getDGenName()));

    conf.setOutputKeyClass(NullWritable.class);
    conf.setOutputValueClass(Text.class);

    conf.setMapperClass(IdentityMapper.class);
    conf.setNumReduceTasks(0);

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

    // input format configuration
    MyriadInputFormat.setDriverJobParameters(conf, this.parameters);
    // output format configuration
    FileOutputFormat.setOutputPath(conf, new Path(this.parameters.getJobOutputPath()));

    return conf;/*ww w . j av  a  2 s.  c o m*/
}

From source file:FormatStorage1.MergeFileUtil.java

License:Open Source License

public static void run(String inputdir, String outputdir, Configuration conf) throws IOException {
    JobConf job = new JobConf(conf);
    job.setJobName("MergeFileUtil");
    job.setJarByClass(MergeFileUtil.class);
    FileSystem fs = null;//from  ww w .ja va 2  s .  com
    fs = FileSystem.get(job);
    if (fs.exists(new Path(outputdir))) {
        throw new IOException("outputdir: " + outputdir + " exist!!!");
    }

    FileStatus[] fss = fs.listStatus(new Path(inputdir));

    if (fss == null || fss.length <= 0) {
        throw new IOException("no input files");
    }

    IFormatDataFile ifdf = new IFormatDataFile(job);
    ifdf.open(fss[0].getPath().toString());
    job.set("ifdf.head.info", ifdf.fileInfo().head().toStr());
    ifdf.close();

    long wholesize = 0;
    for (FileStatus status : fss) {
        wholesize += status.getLen();
    }

    job.setNumReduceTasks(0);

    FileInputFormat.setInputPaths(job, inputdir);
    FileOutputFormat.setOutputPath(job, new Path(outputdir));

    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(IRecord.class);

    job.setMapperClass(MergeMap.class);

    job.setInputFormat(CombineFormatStorageFileInputFormat.class);
    job.setOutputFormat(MergeIFormatOutputFormat.class);

    JobClient jc = new JobClient(job);
    RunningJob rjob = jc.submitJob(job);
    try {

        String lastReport = "";
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss,SSS");
        long reportTime = System.currentTimeMillis();
        long maxReportInterval = 3 * 1000;

        while (!rjob.isComplete()) {
            Thread.sleep(1000);

            int mapProgress = Math.round(rjob.mapProgress() * 100);
            int reduceProgress = Math.round(rjob.reduceProgress() * 100);

            String report = " map = " + mapProgress + "%,  reduce = " + reduceProgress + "%";

            if (!report.equals(lastReport) || System.currentTimeMillis() >= reportTime + maxReportInterval) {

                String output = dateFormat.format(Calendar.getInstance().getTime()) + report;
                System.err.println(output);
                lastReport = report;
                reportTime = System.currentTimeMillis();
            }
        }
        LOG.info(rjob.getJobState());

    } catch (IOException e1) {
        e1.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

From source file:FormatStorage1.MergeFileUtil.java

License:Open Source License

public static void runold(String inputdir, String outputdir, Configuration conf) throws IOException {
    JobConf job = new JobConf(conf);
    job.setJobName("MergeFileUtil");
    job.setJarByClass(MergeFileUtil.class);
    FileSystem fs = null;/*from  w ww.java2 s  .c  om*/
    fs = FileSystem.get(job);
    if (fs.exists(new Path(outputdir))) {
        throw new IOException("outputdir: " + outputdir + " exist!!!");
    }

    FileStatus[] fss = fs.listStatus(new Path(inputdir));

    if (fss == null || fss.length <= 0) {
        throw new IOException("no input files");
    }

    for (FileStatus status : fss) {
        if (status.isDir()) {
            throw new IOException("!!!input dir contains directory:\t" + status.getPath().toString());
        }
    }

    IFormatDataFile ifdf = new IFormatDataFile(job);
    ifdf.open(fss[0].getPath().toString());
    job.set("ifdf.head.info", ifdf.fileInfo().head().toStr());
    ifdf.close();

    long wholesize = 0;
    for (FileStatus status : fss) {
        wholesize += status.getLen();
    }

    long fl = 512 * 1024 * 1024;
    int reduces = (int) (wholesize / fl + 1);
    job.setNumReduceTasks(reduces);

    FileInputFormat.setInputPaths(job, inputdir);
    FileOutputFormat.setOutputPath(job, new Path(outputdir));

    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(IRecord.class);

    job.setMapperClass(MergeMap.class);
    job.setReducerClass(MergeReduce.class);

    job.setInputFormat(MergeIFormatInputFormat.class);
    job.setOutputFormat(MergeIFormatOutputFormat.class);

    JobClient jc = new JobClient(job);
    RunningJob rjob = jc.submitJob(job);
    try {

        String lastReport = "";
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss,SSS");
        long reportTime = System.currentTimeMillis();
        long maxReportInterval = 3 * 1000;

        while (!rjob.isComplete()) {
            Thread.sleep(1000);

            int mapProgress = Math.round(rjob.mapProgress() * 100);
            int reduceProgress = Math.round(rjob.reduceProgress() * 100);

            String report = " map = " + mapProgress + "%,  reduce = " + reduceProgress + "%";

            if (!report.equals(lastReport) || System.currentTimeMillis() >= reportTime + maxReportInterval) {

                String output = dateFormat.format(Calendar.getInstance().getTime()) + report;
                System.err.println(output);
                lastReport = report;
                reportTime = System.currentTimeMillis();
            }
        }
        LOG.info(rjob.getJobState());

    } catch (IOException e1) {
        e1.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

From source file:FormatStorage1.MergeFileUtil1.java

License:Open Source License

public static void run(String inputdir, String outputdir, Configuration conf) throws IOException {
    JobConf job = new JobConf(conf);
    job.setJobName("MergeFileUtil1");
    job.setJarByClass(MergeFileUtil1.class);
    FileSystem fs = null;//from w w w . ja  v a2s  .com
    fs = FileSystem.get(job);
    if (fs.exists(new Path(outputdir))) {
        throw new IOException("outputdir: " + outputdir + " exist!!!");
    }

    FileStatus[] fss = fs.listStatus(new Path(inputdir));

    if (fss == null || fss.length <= 0) {
        throw new IOException("no input files");
    }

    IFormatDataFile ifdf = new IFormatDataFile(job);
    ifdf.open(fss[0].getPath().toString());
    job.set("ifdf.head.info", ifdf.fileInfo().head().toStr());
    ifdf.close();

    long wholesize = 0;
    for (FileStatus status : fss) {
        wholesize += status.getLen();
    }

    job.setNumReduceTasks(0);

    FileInputFormat.setInputPaths(job, inputdir);
    FileOutputFormat.setOutputPath(job, new Path(outputdir));

    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(IRecord.class);

    job.setMapperClass(MergeMap.class);

    job.setInputFormat(CombineFormatStorageFileInputFormat.class);
    job.setOutputFormat(MergeIFormatOutputFormat1.class);

    JobClient jc = new JobClient(job);
    RunningJob rjob = jc.submitJob(job);
    try {

        String lastReport = "";
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss,SSS");
        long reportTime = System.currentTimeMillis();
        long maxReportInterval = 3 * 1000;

        while (!rjob.isComplete()) {
            Thread.sleep(1000);

            int mapProgress = Math.round(rjob.mapProgress() * 100);
            int reduceProgress = Math.round(rjob.reduceProgress() * 100);

            String report = " map = " + mapProgress + "%,  reduce = " + reduceProgress + "%";

            if (!report.equals(lastReport) || System.currentTimeMillis() >= reportTime + maxReportInterval) {

                String output = dateFormat.format(Calendar.getInstance().getTime()) + report;
                System.err.println(output);
                lastReport = report;
                reportTime = System.currentTimeMillis();
            }
        }
        LOG.info(rjob.getJobState());

    } catch (IOException e1) {
        e1.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

From source file:FormatStorage1.MergeFileUtil1.java

License:Open Source License

public static void runold(String inputdir, String outputdir, Configuration conf) throws IOException {
    JobConf job = new JobConf(conf);
    job.setJobName("MergeFileUtil");
    job.setJarByClass(MergeFileUtil1.class);
    FileSystem fs = null;//  w  w w .j a v a  2s.com
    fs = FileSystem.get(job);
    if (fs.exists(new Path(outputdir))) {
        throw new IOException("outputdir: " + outputdir + " exist!!!");
    }

    FileStatus[] fss = fs.listStatus(new Path(inputdir));

    if (fss == null || fss.length <= 0) {
        throw new IOException("no input files");
    }

    for (FileStatus status : fss) {
        if (status.isDir()) {
            throw new IOException("!!!input dir contains directory:\t" + status.getPath().toString());
        }
    }

    IFormatDataFile ifdf = new IFormatDataFile(job);
    ifdf.open(fss[0].getPath().toString());
    job.set("ifdf.head.info", ifdf.fileInfo().head().toStr());
    ifdf.close();

    long wholesize = 0;
    for (FileStatus status : fss) {
        wholesize += status.getLen();
    }

    long fl = 512 * 1024 * 1024;
    int reduces = (int) (wholesize / fl + 1);
    job.setNumReduceTasks(reduces);

    FileInputFormat.setInputPaths(job, inputdir);
    FileOutputFormat.setOutputPath(job, new Path(outputdir));

    job.setOutputKeyClass(LongWritable.class);
    job.setOutputValueClass(IRecord.class);

    job.setMapperClass(MergeMap.class);
    job.setReducerClass(MergeReduce.class);

    job.setInputFormat(MergeIFormatInputFormat.class);
    job.setOutputFormat(MergeIFormatOutputFormat.class);

    JobClient jc = new JobClient(job);
    RunningJob rjob = jc.submitJob(job);
    try {

        String lastReport = "";
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss,SSS");
        long reportTime = System.currentTimeMillis();
        long maxReportInterval = 3 * 1000;

        while (!rjob.isComplete()) {
            Thread.sleep(1000);

            int mapProgress = Math.round(rjob.mapProgress() * 100);
            int reduceProgress = Math.round(rjob.reduceProgress() * 100);

            String report = " map = " + mapProgress + "%,  reduce = " + reduceProgress + "%";

            if (!report.equals(lastReport) || System.currentTimeMillis() >= reportTime + maxReportInterval) {

                String output = dateFormat.format(Calendar.getInstance().getTime()) + report;
                System.err.println(output);
                lastReport = report;
                reportTime = System.currentTimeMillis();
            }
        }
        LOG.info(rjob.getJobState());

    } catch (IOException e1) {
        e1.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}