Example usage for org.apache.hadoop.mapreduce.lib.output FileOutputFormat setOutputPath

List of usage examples for org.apache.hadoop.mapreduce.lib.output FileOutputFormat setOutputPath

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Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce.lib.output FileOutputFormat setOutputPath.

Prototype

public static void setOutputPath(Job job, Path outputDir)

Source Link

Document

Set the Path of the output directory for the map-reduce job.

Usage

From source file:com.asakusafw.runtime.stage.output.StageOutputDriver.java

License:Apache License

/**
 * Sets the output specification for this job.
 * @param job current job/*from   w w  w  .j  a  v  a  2s .  c  o  m*/
 * @param outputPath base output path
 * @param outputList each output information
 * @throws IOException if failed to configure the output specification
 * @throws IllegalArgumentException if some parameters were {@code null}
 * @since 0.2.5
 */
public static void set(Job job, String outputPath, Collection<StageOutput> outputList) throws IOException {
    if (job == null) {
        throw new IllegalArgumentException("job must not be null"); //$NON-NLS-1$
    }
    if (outputPath == null) {
        throw new IllegalArgumentException("outputPath must not be null"); //$NON-NLS-1$
    }
    if (outputList == null) {
        throw new IllegalArgumentException("outputList must not be null"); //$NON-NLS-1$
    }
    List<StageOutput> brigeOutputs = new ArrayList<>();
    List<StageOutput> normalOutputs = new ArrayList<>();
    boolean sawFileOutput = false;
    boolean sawTemporaryOutput = false;
    for (StageOutput output : outputList) {
        Class<? extends OutputFormat<?, ?>> formatClass = output.getFormatClass();
        if (BridgeOutputFormat.class.isAssignableFrom(formatClass)) {
            brigeOutputs.add(output);
        } else {
            normalOutputs.add(output);
        }
    }
    if (brigeOutputs.isEmpty() == false) {
        BridgeOutputFormat.set(job, brigeOutputs);
    }
    for (StageOutput output : normalOutputs) {
        String name = output.getName();
        Class<?> keyClass = output.getKeyClass();
        Class<?> valueClass = output.getValueClass();
        Class<? extends OutputFormat<?, ?>> formatClass = output.getFormatClass();
        sawFileOutput |= FileOutputFormat.class.isAssignableFrom(formatClass);
        sawTemporaryOutput |= TemporaryOutputFormat.class.isAssignableFrom(formatClass);
        addOutput(job, name, formatClass, keyClass, valueClass);
    }
    if (sawFileOutput) {
        FileOutputFormat.setOutputPath(job, new Path(outputPath));
    }
    if (sawTemporaryOutput) {
        TemporaryOutputFormat.setOutputPath(job, new Path(outputPath));
    }
}

From source file:com.asakusafw.testdriver.file.FileDeployer.java

License:Apache License

/**
 * Opens output for the specified {@link OutputFormat}.
 * @param <V> value type//from   www .  j  ava  2  s  . c  o  m
 * @param definition target model definition
 * @param destination output location
 * @param output format
 * @return the opened {@link ModelOutput}
 * @throws IOException if failed to open the target output
 * @throws IllegalArgumentException if some parameters were {@code null}
 */
public <V> ModelOutput<V> openOutput(DataModelDefinition<V> definition, final String destination,
        FileOutputFormat<? super NullWritable, ? super V> output) throws IOException {
    assert destination != null;
    assert output != null;
    LOG.debug("Opening {} using {}", destination, output.getClass().getName());
    Job job = Job.getInstance(configuration);
    job.setOutputKeyClass(NullWritable.class);
    job.setOutputValueClass(definition.getModelClass());
    final File temporaryDir = File.createTempFile("asakusa", ".tempdir");
    if (temporaryDir.delete() == false || temporaryDir.mkdirs() == false) {
        throw new IOException("Failed to create temporary directory");
    }
    LOG.debug("Using staging deploy target: {}", temporaryDir);
    URI uri = temporaryDir.toURI();
    FileOutputFormat.setOutputPath(job, new Path(uri));
    TaskAttemptContext context = new TaskAttemptContextImpl(job.getConfiguration(),
            new TaskAttemptID(new TaskID(new JobID(), TaskType.MAP, 0), 0));
    FileOutputFormatDriver<V> result = new FileOutputFormatDriver<V>(context, output, NullWritable.get()) {
        @Override
        public void close() throws IOException {
            super.close();
            deploy(destination, temporaryDir);
        }
    };
    return result;
}

From source file:com.asp.tranlog.ImportTsv.java

License:Apache License

/**
 * Sets up the actual job.//from  w ww  .  java  2 s . c  om
 * 
 * @param conf
 *            The current configuration.
 * @param args
 *            The command line parameters.
 * @return The newly created job.
 * @throws IOException
 *             When setting up the job fails.
 */
public static Job createSubmittableJob(Configuration conf, String[] args)
        throws IOException, ClassNotFoundException {

    // Support non-XML supported characters
    // by re-encoding the passed separator as a Base64 string.
    String actualSeparator = conf.get(SEPARATOR_CONF_KEY);
    if (actualSeparator != null) {
        conf.set(SEPARATOR_CONF_KEY, new String(Base64.encodeBytes(actualSeparator.getBytes())));
    }

    // See if a non-default Mapper was set
    String mapperClassName = conf.get(MAPPER_CONF_KEY);
    Class mapperClass = mapperClassName != null ? Class.forName(mapperClassName) : DEFAULT_MAPPER;

    String tableName = args[0];
    Path inputDir = new Path(args[1]);
    Job job = new Job(conf, NAME + "_" + tableName);
    job.setJarByClass(mapperClass);
    FileInputFormat.setInputPaths(job, inputDir);

    String inputCodec = conf.get(INPUT_LZO_KEY);
    if (inputCodec == null) {
        FileInputFormat.setMaxInputSplitSize(job, 67108864l); // max split
        // size =
        // 64m
        job.setInputFormatClass(TextInputFormat.class);
    } else {
        if (inputCodec.equalsIgnoreCase("lzo"))
            job.setInputFormatClass(LzoTextInputFormat.class);
        else {
            usage("not supported compression codec!");
            System.exit(-1);
        }
    }

    job.setMapperClass(mapperClass);

    String hfileOutPath = conf.get(BULK_OUTPUT_CONF_KEY);
    if (hfileOutPath != null) {
        HTable table = new HTable(conf, tableName);
        job.setReducerClass(PutSortReducer.class);
        Path outputDir = new Path(hfileOutPath);
        FileOutputFormat.setOutputPath(job, outputDir);
        job.setMapOutputKeyClass(ImmutableBytesWritable.class);
        job.setMapOutputValueClass(Put.class);
        HFileOutputFormat.configureIncrementalLoad(job, table);
    } else {
        // No reducers. Just write straight to table. Call
        // initTableReducerJob
        // to set up the TableOutputFormat.
        TableMapReduceUtil.initTableReducerJob(tableName, null, job);
        job.setNumReduceTasks(0);
    }

    TableMapReduceUtil.addDependencyJars(job);
    TableMapReduceUtil.addDependencyJars(job.getConfiguration(), com.google.common.base.Function.class /*
                                                                                                       * Guava used by TsvParser
                                                                                                       */);
    return job;
}

From source file:com.avira.couchdoop.demo.ImportDriver.java

License:Apache License

@Override
public int run(String[] args) throws Exception {
    if (args.length != 1) {
        System.err.println("Usage: <output_path>");
        return 1;
    }//  ww w.  j a va 2 s .c om
    String output = args[0];

    Job job = Job.getInstance(getConf());
    job.setJarByClass(this.getClass());

    // User classpath takes precedence in favor of Hadoop classpath.
    // This is because the Couchbase client requires a newer version of
    // org.apache.httpcomponents:httpcore.
    job.setUserClassesTakesPrecedence(true);

    // Input
    job.setInputFormatClass(CouchbaseViewInputFormat.class);

    // Mapper
    job.setMapperClass(ImportMapper.class);

    // Reducer
    job.setNumReduceTasks(0);

    // Output
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    FileOutputFormat.setOutputPath(job, new Path(output));

    if (!job.waitForCompletion(true)) {
        return 2;
    }

    return 0;
}

From source file:com.avira.couchdoop.jobs.CouchbaseViewImporter.java

License:Apache License

public Job configureJob(Configuration conf, String output) throws IOException {
    conf.setInt("mapreduce.map.failures.maxpercent", 5);
    conf.setInt("mapred.max.map.failures.percent", 5);
    conf.setInt("mapred.max.tracker.failures", 20);

    Job job = Job.getInstance(conf);//from  w w w .j a va  2s  .  co  m
    job.setJarByClass(CouchbaseViewImporter.class);

    // Input
    job.setInputFormatClass(CouchbaseViewInputFormat.class);

    // Mapper
    job.setMapperClass(CouchbaseViewToFileMapper.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(Text.class);

    // Reducer
    job.setNumReduceTasks(0);

    // Output
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(Text.class);
    FileOutputFormat.setOutputPath(job, new Path(output));

    return job;
}

From source file:com.awcoleman.BouncyCastleGenericCDRHadoop.BasicDriverMapReduce.java

License:Apache License

public int run(String[] args) throws Exception {

    if (args.length < 2) {
        System.out.println("Missing input and output filenames. Exiting.");
        System.exit(1);//  w w w. j  a  v a  2  s. c  o  m
    }

    Job job = new Job(super.getConf());
    job.setJarByClass(BasicDriverMapReduce.class);
    job.setJobName("BasicDriver1");
    job.setMapperClass(BasicMapper.class);
    job.setReducerClass(BasicReducer.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(LongWritable.class);
    job.setInputFormatClass(RawFileAsBinaryInputFormat.class);
    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    return job.waitForCompletion(true) ? 0 : 1;
}

From source file:com.awcoleman.BouncyCastleGenericCDRHadoopWithWritable.BasicDriverMapReduce.java

License:Apache License

public int run(String[] args) throws Exception {

    if (args.length < 2) {
        System.out.println("Missing input and output filenames. Exiting.");
        System.exit(1);/* w w w .ja va2 s.  c o m*/
    }

    @SuppressWarnings("deprecation")
    Job job = new Job(super.getConf());
    job.setJarByClass(BasicDriverMapReduce.class);
    job.setJobName("BasicDriverMapReduce");
    job.setMapperClass(BasicMapper.class);
    job.setReducerClass(BasicReducer.class);
    job.setMapOutputKeyClass(Text.class);
    job.setMapOutputValueClass(CallDetailRecord.class);
    job.setOutputKeyClass(Text.class);
    job.setOutputValueClass(LongWritable.class);
    job.setInputFormatClass(RawFileAsBinaryInputFormat.class);
    FileInputFormat.addInputPath(job, new Path(args[0]));
    FileOutputFormat.setOutputPath(job, new Path(args[1]));

    return job.waitForCompletion(true) ? 0 : 1;
}

From source file:com.awcoleman.ExampleJobSummaryLogWithOutput.BinRecToAvroRecDriver.java

License:Apache License

public int run(String[] args) throws Exception {

    String input = null;/*from ww  w .j  a va  2s . com*/
    String output = null;

    if (args.length < 2) {
        System.err.printf("Usage: %s <input> <output>\n", this.getClass().getSimpleName());
        return -1;
    } else {
        input = args[0];
        output = args[1];
    }

    Job job = Job.getInstance(getConf(), "BinRecToAvroRecDriver");
    Configuration conf = job.getConfiguration();

    //Add job log to hold Driver logging (and any summary info about the dataset,job, or counters we want to write)
    String fapath = createTempFileAppender(job);

    //get schema
    Schema outSchema = ReflectData.get().getSchema(com.awcoleman.examples.avro.BinRecForPartitions.class);
    job.getConfiguration().set("outSchema", outSchema.toString());

    //Job conf settings
    job.setJarByClass(BinRecToAvroRecDriver.class);
    job.setMapperClass(Map.class);
    job.setReducerClass(Reduce.class);
    job.setInputFormatClass(BinRecInputFormat.class);
    job.setOutputFormatClass(AvroKeyOutputFormat.class);
    AvroJob.setOutputKeySchema(job, outSchema);

    AvroJob.setMapOutputKeySchema(job, Schema.create(Schema.Type.STRING));
    AvroJob.setMapOutputValueSchema(job, outSchema);

    //Job output compression
    FileOutputFormat.setCompressOutput(job, true);
    job.getConfiguration().set(AvroJob.CONF_OUTPUT_CODEC, DataFileConstants.DEFLATE_CODEC);

    //Input and Output Paths
    FileInputFormat.setInputPaths(job, new Path(input));
    Path outPath = new Path(output);
    FileOutputFormat.setOutputPath(job, outPath);
    outPath.getFileSystem(conf).delete(outPath, true);

    boolean jobCompletionStatus = job.waitForCompletion(true);

    //Print Custom Counters before exiting
    Counters counters = job.getCounters();
    for (MYJOB_CNTRS customCounter : MYJOB_CNTRS.values()) {
        Counter thisCounter = counters.findCounter(customCounter);
        System.out.println("Custom Counter " + customCounter + "=" + thisCounter.getValue());
    }

    long mycnt1 = job.getCounters()
            .findCounter("com.awcoleman.TestingGettingContainerLogger.BinRecToAvroRecDriver$MYJOB_CNTRS",
                    "MYCNT1")
            .getValue();
    long mycnt2 = job.getCounters()
            .findCounter("com.awcoleman.TestingGettingContainerLogger.BinRecToAvroRecDriver$MYJOB_CNTRS",
                    "MYCNT2")
            .getValue();
    long mycnt3 = job.getCounters()
            .findCounter("com.awcoleman.TestingGettingContainerLogger.BinRecToAvroRecDriver$MYJOB_CNTRS",
                    "MYCNT3")
            .getValue();

    long myfakekpi = mycnt1 - mycnt2;

    String msgMyfakekpi = "The Fake KPI of the Dataset: " + String.format("%,d", myfakekpi);
    System.out.println(msgMyfakekpi);
    logger.info(msgMyfakekpi);

    //Finished, so move job log to HDFS in _log dir, clean
    copyTempFileAppenderToHDFSOutpath(job, fapath, output);

    return jobCompletionStatus ? 0 : 1;
}

From source file:com.baidu.cloud.bmr.mapreduce.AccessLogAnalyzer.java

License:Open Source License

public static void main(String[] args) {
    Configuration conf = new Configuration();
    if (args.length != 2) {
        System.err.println("Usage: AccessLogAnalyzer <input path> <output path>");
        System.exit(-1);//from  www.j a  v  a  2 s . c  om
    }
    String inputPath = args[0];
    String outputPath = args[1];
    try {
        Job job = new Job(conf, "AccessLogAnalyzer");
        job.setJarByClass(AccessLogAnalyzer.class);
        job.setMapperClass(AccessLogAnalyzerMapper.class);
        job.setReducerClass(AccessLogAnalyzerReducer.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(IntWritable.class);
        FileInputFormat.setInputPaths(job, inputPath);
        FileOutputFormat.setOutputPath(job, new Path(outputPath));
        System.exit(job.waitForCompletion(true) ? 0 : 1);
    } catch (IOException | ClassNotFoundException | InterruptedException e) {
    }
}

From source file:com.bark.hadoop.lab3.PageRank.java

@Override
public int run(String args[]) {
    String tmp = "/tmp/" + new Date().getTime();
    //        long timeStamp = new Date().getTime();
    try {/*w  w  w . j  av a2 s .co  m*/
        /**
         * Job 1: Parse XML input and read title,links
         */
        Configuration conf = new Configuration();
        conf.set("xmlinput.start", "<page>");
        conf.set("xmlinput.end", "</page>");

        Job job = Job.getInstance(conf);
        job.setJarByClass(PageRank.class);

        // specify a mapper
        job.setMapperClass(RedLinkMapper.class);

        // specify a reducer
        job.setReducerClass(RedLinkReducer.class);

        // specify output types
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);

        // specify input and output DIRECTORIES
        FileInputFormat.addInputPath(job, new Path(args[0]));
        job.setInputFormatClass(XmlInputFormat.class);

        FileOutputFormat.setOutputPath(job, new Path((args[1] + tmp + "/job1")));
        job.setOutputFormatClass(TextOutputFormat.class);

        job.waitForCompletion(true);
    } catch (InterruptedException | ClassNotFoundException | IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error during mapreduce job1.");
        return 2;
    }
    /**
     * Job 2: Adjacency outGraph
     */
    try {
        Configuration conf2 = new Configuration();

        Job job2 = Job.getInstance(conf2);
        job2.setJarByClass(PageRank.class);

        // specify a mapper
        job2.setMapperClass(AdjMapper.class);

        // specify a reducer
        job2.setReducerClass(AdjReducer.class);

        // specify output types
        job2.setOutputKeyClass(Text.class);
        job2.setOutputValueClass(Text.class);

        // specify input and output DIRECTORIES
        FileInputFormat.addInputPath(job2, new Path((args[1] + tmp + "/job1")));
        job2.setInputFormatClass(TextInputFormat.class);

        FileOutputFormat.setOutputPath(job2, new Path((args[1] + tmp + "/job2")));
        job2.setOutputFormatClass(TextOutputFormat.class);

        job2.waitForCompletion(true);
    } catch (InterruptedException | ClassNotFoundException | IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error during mapreduce job2.");
        return 2;
    }
    /**
     * Job 3: PageCount
     */
    try {
        Configuration conf3 = new Configuration();
        /**
         * Change output separator to "=" instead of default \t for this job
         */
        conf3.set("mapreduce.output.textoutputformat.separator", "=");

        Job job3 = Job.getInstance(conf3);
        job3.setJarByClass(PageRank.class);

        // specify a mapper
        job3.setMapperClass(PageCountMapper.class);

        // specify a reducer
        job3.setReducerClass(PageCountReducer.class);

        // specify output types
        job3.setOutputKeyClass(Text.class);
        job3.setOutputValueClass(IntWritable.class);

        // specify input and output DIRECTORIES
        FileInputFormat.addInputPath(job3, new Path((args[1] + tmp + "/job2")));
        job3.setInputFormatClass(TextInputFormat.class);

        FileOutputFormat.setOutputPath(job3, new Path((args[1] + tmp + "/job3")));
        job3.setOutputFormatClass(TextOutputFormat.class);

        job3.waitForCompletion(true);
    } catch (InterruptedException | ClassNotFoundException | IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error during mapreduce job3.");
        return 2;
    }
    /**
     * Job 4: PageRank
     */
    for (int i = 1; i < 9; i++) {
        try {
            Configuration conf4 = new Configuration();
            /**
             * Read number of nodes from the output of job 3 : pageCount
             */
            Path path = new Path((args[1] + tmp + "/job3"));
            FileSystem fs = path.getFileSystem(conf4);
            RemoteIterator<LocatedFileStatus> ri = fs.listFiles(path, true);

            int n = 0;
            Pattern pt = Pattern.compile("(\\d+)");
            while (ri.hasNext()) {
                LocatedFileStatus lfs = ri.next();
                if (lfs.isFile() && n == 0) {
                    FSDataInputStream inputStream = fs.open(lfs.getPath());
                    BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
                    String s = null;
                    while ((s = br.readLine()) != null) {
                        Matcher mt = pt.matcher(s);
                        if (mt.find()) {
                            n = new Integer(mt.group(1));
                            break;
                        }
                    }
                }
            }
            /**
             * Done reading number of nodes, make it available to MapReduce
             * job key: N
             */
            conf4.setInt("N", n);

            Job job4 = Job.getInstance(conf4);
            job4.setJarByClass(PageRank.class);

            // specify a mapper
            job4.setMapperClass(PageRankMapper.class);

            // specify a reducer
            job4.setReducerClass(PageRankReducer.class);

            // specify output types
            job4.setOutputKeyClass(Text.class);
            job4.setOutputValueClass(Text.class);

            // specify input and output DIRECTORIES
            if (i == 1) {
                FileInputFormat.addInputPath(job4, new Path((args[1] + tmp + "/job2")));
            } else {
                FileInputFormat.addInputPath(job4, new Path((args[1] + tmp + "/job4/" + (i - 1))));
            }
            job4.setInputFormatClass(TextInputFormat.class);

            FileOutputFormat.setOutputPath(job4, new Path((args[1] + tmp + "/job4/" + i)));
            job4.setOutputFormatClass(TextOutputFormat.class);
            job4.waitForCompletion(true);
        } catch (InterruptedException | ClassNotFoundException | IOException ex) {
            Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
            System.err.println("Error during mapreduce job4.");
            return 2;
        }
    }
    /**
     * Job 5: Sort iteration 1 and iteration 8
     */
    int returnCode = 0;
    for (int i = 0; i < 2; i++) {
        try {
            Configuration conf5 = new Configuration();

            /**
             * Read number of nodes from the output of job 3 : pageCount
             */
            Path path = new Path((args[1] + tmp + "/job3"));
            FileSystem fs = path.getFileSystem(conf5);
            RemoteIterator<LocatedFileStatus> ri = fs.listFiles(path, true);

            int n = 0;
            Pattern pt = Pattern.compile("(\\d+)");
            while (ri.hasNext()) {
                LocatedFileStatus lfs = ri.next();
                if (lfs.isFile() && n == 0) {
                    FSDataInputStream inputStream = fs.open(lfs.getPath());
                    BufferedReader br = new BufferedReader(new InputStreamReader(inputStream));
                    String s = null;
                    while ((s = br.readLine()) != null) {
                        Matcher mt = pt.matcher(s);
                        if (mt.find()) {
                            n = new Integer(mt.group(1));
                            break;
                        }
                    }
                }
            }
            /**
             * Done reading number of nodes, make it available to MapReduce
             * job key: N
             */
            conf5.setInt("N", n);

            Job job5 = Job.getInstance(conf5);
            /**
             * one reducer only
             */
            job5.setNumReduceTasks(1);
            job5.setSortComparatorClass(MyWritableComparator.class);
            job5.setJarByClass(PageRank.class);

            // specify a mapper
            job5.setMapperClass(SortMapper.class);
            job5.setMapOutputKeyClass(DoubleWritable.class);
            job5.setMapOutputValueClass(Text.class);

            // specify a reducer
            job5.setReducerClass(SortReducer.class);

            // specify output types
            job5.setOutputKeyClass(Text.class);
            job5.setOutputValueClass(DoubleWritable.class);

            // specify input and output DIRECTORIES
            int y = 7 * i + 1;
            FileInputFormat.addInputPath(job5, new Path((args[1] + tmp + "/job4/" + y)));
            job5.setInputFormatClass(TextInputFormat.class);

            FileOutputFormat.setOutputPath(job5, new Path((args[1] + tmp + "/job5/" + y)));
            job5.setOutputFormatClass(TextOutputFormat.class);

            returnCode = job5.waitForCompletion(true) ? 0 : 1;
        } catch (InterruptedException | ClassNotFoundException | IOException ex) {
            Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
            System.err.println("Error during mapreduce job5.");
            return 2;
        }
    }
    /**
     * Copy necessary output files to args[1]        /**
     * Copy necessary output files to args[1]
     */

    /**
     * Rename and copy OutLinkGraph
     */
    try {
        Configuration conf = new Configuration();

        Path outLinkGraph = new Path((args[1] + tmp + "/job2/part-r-00000"));
        FileSystem outLinkGraphFS = outLinkGraph.getFileSystem(conf);

        Path output = new Path(args[1] + "/results/PageRank.outlink.out");
        FileSystem outputFS = output.getFileSystem(conf);
        org.apache.hadoop.fs.FileUtil.copy(outLinkGraphFS, outLinkGraph, outputFS, output, false, true, conf);
    } catch (IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error while copying results.");
        return 2;
    }

    /**
     * Rename and copy total number of pages
     */
    try {
        Configuration conf = new Configuration();

        Path outLinkGraph = new Path((args[1] + tmp + "/job3/part-r-00000"));
        FileSystem outLinkGraphFS = outLinkGraph.getFileSystem(conf);

        Path output = new Path(args[1] + "/results/PageRank.n.out");
        FileSystem outputFS = output.getFileSystem(conf);
        org.apache.hadoop.fs.FileUtil.copy(outLinkGraphFS, outLinkGraph, outputFS, output, false, true, conf);
    } catch (IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error while copying results.");
        return 2;
    }

    /**
     * Rename and copy iteration 1
     */
    try {
        Configuration conf = new Configuration();

        Path outLinkGraph = new Path((args[1] + tmp + "/job5/1/part-r-00000"));
        FileSystem outLinkGraphFS = outLinkGraph.getFileSystem(conf);

        Path output = new Path(args[1] + "/results/PageRank.iter1.out");
        FileSystem outputFS = output.getFileSystem(conf);
        org.apache.hadoop.fs.FileUtil.copy(outLinkGraphFS, outLinkGraph, outputFS, output, false, true, conf);
    } catch (IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error while copying results.");
        return 2;
    }

    /**
     * Rename and copy iteration 8
     */
    try {
        Configuration conf = new Configuration();

        Path outLinkGraph = new Path((args[1] + tmp + "/job5/8/part-r-00000"));
        FileSystem outLinkGraphFS = outLinkGraph.getFileSystem(conf);

        Path output = new Path(args[1] + "/results/PageRank.iter8.out");
        FileSystem outputFS = output.getFileSystem(conf);
        org.apache.hadoop.fs.FileUtil.copy(outLinkGraphFS, outLinkGraph, outputFS, output, false, true, conf);
    } catch (IOException ex) {
        Logger.getLogger(PageRank.class.getName()).log(Level.SEVERE, ex.toString(), ex);
        System.err.println("Error while copying results.");
        return 2;
    }
    return returnCode;
}