Example usage for org.apache.hadoop.mapreduce MRJobConfig COMBINE_CLASS

Introduction

In this page you can find the example usage for org.apache.hadoop.mapreduce MRJobConfig COMBINE_CLASS_ATTR.

Prototype

String COMBINE_CLASS_ATTR

To view the source code for org.apache.hadoop.mapreduce MRJobConfig COMBINE_CLASS_ATTR.

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Usage

From source file:org.apache.ignite.internal.processors.hadoop.GridHadoopUtils.java

License:Apache License

/**
 * Creates JobInfo from hadoop configuration.
 *
 * @param cfg Hadoop configuration./*from  w ww  .ja  v a  2s. co m*/
 * @return Job info.
 * @throws IgniteCheckedException If failed.
 */
public static GridHadoopDefaultJobInfo createJobInfo(Configuration cfg) throws IgniteCheckedException {
    JobConf jobConf = new JobConf(cfg);

    boolean hasCombiner = jobConf.get("mapred.combiner.class") != null
            || jobConf.get(MRJobConfig.COMBINE_CLASS_ATTR) != null;

    int numReduces = jobConf.getNumReduceTasks();

    jobConf.setBooleanIfUnset("mapred.mapper.new-api", jobConf.get(OLD_MAP_CLASS_ATTR) == null);

    if (jobConf.getUseNewMapper()) {
        String mode = "new map API";

        ensureNotSet(jobConf, "mapred.input.format.class", mode);
        ensureNotSet(jobConf, OLD_MAP_CLASS_ATTR, mode);

        if (numReduces != 0)
            ensureNotSet(jobConf, "mapred.partitioner.class", mode);
        else
            ensureNotSet(jobConf, "mapred.output.format.class", mode);
    } else {
        String mode = "map compatibility";

        ensureNotSet(jobConf, MRJobConfig.INPUT_FORMAT_CLASS_ATTR, mode);
        ensureNotSet(jobConf, MRJobConfig.MAP_CLASS_ATTR, mode);

        if (numReduces != 0)
            ensureNotSet(jobConf, MRJobConfig.PARTITIONER_CLASS_ATTR, mode);
        else
            ensureNotSet(jobConf, MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, mode);
    }

    if (numReduces != 0) {
        jobConf.setBooleanIfUnset("mapred.reducer.new-api", jobConf.get(OLD_REDUCE_CLASS_ATTR) == null);

        if (jobConf.getUseNewReducer()) {
            String mode = "new reduce API";

            ensureNotSet(jobConf, "mapred.output.format.class", mode);
            ensureNotSet(jobConf, OLD_REDUCE_CLASS_ATTR, mode);
        } else {
            String mode = "reduce compatibility";

            ensureNotSet(jobConf, MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, mode);
            ensureNotSet(jobConf, MRJobConfig.REDUCE_CLASS_ATTR, mode);
        }
    }

    Map<String, String> props = new HashMap<>();

    for (Map.Entry<String, String> entry : jobConf)
        props.put(entry.getKey(), entry.getValue());

    return new GridHadoopDefaultJobInfo(jobConf.getJobName(), jobConf.getUser(), hasCombiner, numReduces,
            props);
}

From source file:org.apache.ignite.internal.processors.hadoop.HadoopUtils.java

License:Apache License

/**
 * Creates JobInfo from hadoop configuration.
 *
 * @param cfg Hadoop configuration./*  w ww.  j av  a  2 s  .  com*/
 * @return Job info.
 * @throws IgniteCheckedException If failed.
 */
public static HadoopDefaultJobInfo createJobInfo(Configuration cfg) throws IgniteCheckedException {
    JobConf jobConf = new JobConf(cfg);

    boolean hasCombiner = jobConf.get("mapred.combiner.class") != null
            || jobConf.get(MRJobConfig.COMBINE_CLASS_ATTR) != null;

    int numReduces = jobConf.getNumReduceTasks();

    jobConf.setBooleanIfUnset("mapred.mapper.new-api", jobConf.get(OLD_MAP_CLASS_ATTR) == null);

    if (jobConf.getUseNewMapper()) {
        String mode = "new map API";

        ensureNotSet(jobConf, "mapred.input.format.class", mode);
        ensureNotSet(jobConf, OLD_MAP_CLASS_ATTR, mode);

        if (numReduces != 0)
            ensureNotSet(jobConf, "mapred.partitioner.class", mode);
        else
            ensureNotSet(jobConf, "mapred.output.format.class", mode);
    } else {
        String mode = "map compatibility";

        ensureNotSet(jobConf, MRJobConfig.INPUT_FORMAT_CLASS_ATTR, mode);
        ensureNotSet(jobConf, MRJobConfig.MAP_CLASS_ATTR, mode);

        if (numReduces != 0)
            ensureNotSet(jobConf, MRJobConfig.PARTITIONER_CLASS_ATTR, mode);
        else
            ensureNotSet(jobConf, MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, mode);
    }

    if (numReduces != 0) {
        jobConf.setBooleanIfUnset("mapred.reducer.new-api", jobConf.get(OLD_REDUCE_CLASS_ATTR) == null);

        if (jobConf.getUseNewReducer()) {
            String mode = "new reduce API";

            ensureNotSet(jobConf, "mapred.output.format.class", mode);
            ensureNotSet(jobConf, OLD_REDUCE_CLASS_ATTR, mode);
        } else {
            String mode = "reduce compatibility";

            ensureNotSet(jobConf, MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, mode);
            ensureNotSet(jobConf, MRJobConfig.REDUCE_CLASS_ATTR, mode);
        }
    }

    Map<String, String> props = new HashMap<>();

    for (Map.Entry<String, String> entry : jobConf)
        props.put(entry.getKey(), entry.getValue());

    return new HadoopDefaultJobInfo(jobConf.getJobName(), jobConf.getUser(), hasCombiner, numReduces, props);
}

From source file:org.gridgain.grid.kernal.processors.hadoop.GridHadoopUtils.java

License:Open Source License

/**
 * Creates JobInfo from hadoop configuration.
 *
 * @param cfg Hadoop configuration.//from   ww w .j  ava  2s . c o  m
 * @return Job info.
 * @throws GridException If failed.
 */
public static GridHadoopDefaultJobInfo createJobInfo(Configuration cfg) throws GridException {
    JobConf jobConf = new JobConf(cfg);

    boolean hasCombiner = jobConf.get("mapred.combiner.class") != null
            || jobConf.get(MRJobConfig.COMBINE_CLASS_ATTR) != null;

    int numReduces = jobConf.getNumReduceTasks();

    jobConf.setBooleanIfUnset("mapred.mapper.new-api", jobConf.get(OLD_MAP_CLASS_ATTR) == null);

    if (jobConf.getUseNewMapper()) {
        String mode = "new map API";

        ensureNotSet(jobConf, "mapred.input.format.class", mode);
        ensureNotSet(jobConf, OLD_MAP_CLASS_ATTR, mode);

        if (numReduces != 0)
            ensureNotSet(jobConf, "mapred.partitioner.class", mode);
        else
            ensureNotSet(jobConf, "mapred.output.format.class", mode);
    } else {
        String mode = "map compatibility";

        ensureNotSet(jobConf, MRJobConfig.INPUT_FORMAT_CLASS_ATTR, mode);
        ensureNotSet(jobConf, MRJobConfig.MAP_CLASS_ATTR, mode);

        if (numReduces != 0)
            ensureNotSet(jobConf, MRJobConfig.PARTITIONER_CLASS_ATTR, mode);
        else
            ensureNotSet(jobConf, MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, mode);
    }

    if (numReduces != 0) {
        jobConf.setBooleanIfUnset("mapred.reducer.new-api", jobConf.get(OLD_REDUCE_CLASS_ATTR) == null);

        if (jobConf.getUseNewReducer()) {
            String mode = "new reduce API";

            ensureNotSet(jobConf, "mapred.output.format.class", mode);
            ensureNotSet(jobConf, OLD_REDUCE_CLASS_ATTR, mode);
        } else {
            String mode = "reduce compatibility";

            ensureNotSet(jobConf, MRJobConfig.OUTPUT_FORMAT_CLASS_ATTR, mode);
            ensureNotSet(jobConf, MRJobConfig.REDUCE_CLASS_ATTR, mode);
        }
    }

    Map<String, String> props = new HashMap<>();

    for (Map.Entry<String, String> entry : jobConf)
        props.put(entry.getKey(), entry.getValue());

    return new GridHadoopDefaultJobInfo(jobConf.getJobName(), jobConf.getUser(), hasCombiner, numReduces,
            props);
}

Example usage for org.apache.hadoop.mapreduce MRJobConfig COMBINE_CLASS_ATTR

Introduction

Prototype

Usage