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Java TaskAttemptID.getTaskType方法代码示例

本文整理汇总了Java中org.apache.hadoop.mapreduce.TaskAttemptID.getTaskType方法的典型用法代码示例。如果您正苦于以下问题:Java TaskAttemptID.getTaskType方法的具体用法?Java TaskAttemptID.getTaskType怎么用?Java TaskAttemptID.getTaskType使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在org.apache.hadoop.mapreduce.TaskAttemptID的用法示例。


在下文中一共展示了TaskAttemptID.getTaskType方法的3个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Java代码示例。

示例1: map

import org.apache.hadoop.mapreduce.TaskAttemptID; //导入方法依赖的package包/类
public void map(Object key, Text value, Context context)
        throws IOException, InterruptedException {
  // Make one mapper slower for speculative execution
  TaskAttemptID taid = context.getTaskAttemptID();
  long sleepTime = 100;
  Configuration conf = context.getConfiguration();
  boolean test_speculate_map =
          conf.getBoolean(MRJobConfig.MAP_SPECULATIVE, false);

  // IF TESTING MAPPER SPECULATIVE EXECUTION:
  //   Make the "*_m_000000_0" attempt take much longer than the others.
  //   When speculative execution is enabled, this should cause the attempt
  //   to be killed and restarted. At that point, the attempt ID will be
  //   "*_m_000000_1", so sleepTime will still remain 100ms.
  if ( (taid.getTaskType() == TaskType.MAP) && test_speculate_map
        && (taid.getTaskID().getId() == 0) && (taid.getId() == 0)) {
    sleepTime = 10000;
  }
  try{
    Thread.sleep(sleepTime);
  } catch(InterruptedException ie) {
    // Ignore
  }
  context.write(value, new IntWritable(1));
}
 
开发者ID:naver,项目名称:hadoop,代码行数:26,代码来源:TestSpeculativeExecution.java

示例2: reduce

import org.apache.hadoop.mapreduce.TaskAttemptID; //导入方法依赖的package包/类
public void reduce(Text key, Iterable<IntWritable> values, 
                       Context context) throws IOException, InterruptedException {
  // Make one reducer slower for speculative execution
  TaskAttemptID taid = context.getTaskAttemptID();
  long sleepTime = 100;
  Configuration conf = context.getConfiguration();
  boolean test_speculate_reduce =
            conf.getBoolean(MRJobConfig.REDUCE_SPECULATIVE, false);

  // IF TESTING REDUCE SPECULATIVE EXECUTION:
  //   Make the "*_r_000000_0" attempt take much longer than the others.
  //   When speculative execution is enabled, this should cause the attempt
  //   to be killed and restarted. At that point, the attempt ID will be
  //   "*_r_000000_1", so sleepTime will still remain 100ms.
  if ( (taid.getTaskType() == TaskType.REDUCE) && test_speculate_reduce
        && (taid.getTaskID().getId() == 0) && (taid.getId() == 0)) {
    sleepTime = 10000;
  }
  try{
    Thread.sleep(sleepTime);
  } catch(InterruptedException ie) {
    // Ignore
  }
  context.write(key,new IntWritable(0));
}
 
开发者ID:naver,项目名称:hadoop,代码行数:26,代码来源:TestSpeculativeExecution.java

示例3: maskAttemptID

import org.apache.hadoop.mapreduce.TaskAttemptID; //导入方法依赖的package包/类
/**
 * Mask the job ID part in a {@link TaskAttemptID}.
 * 
 * @param attemptId
 *          raw {@link TaskAttemptID} read from trace
 * @return masked {@link TaskAttemptID} with empty {@link JobID}.
 */
private TaskAttemptID maskAttemptID(TaskAttemptID attemptId) {
  JobID jobId = new JobID();
  TaskType taskType = attemptId.getTaskType();
  TaskID taskId = attemptId.getTaskID();
  return new TaskAttemptID(jobId.getJtIdentifier(), jobId.getId(), taskType,
      taskId.getId(), attemptId.getId());
}
 
开发者ID:naver,项目名称:hadoop,代码行数:15,代码来源:ZombieJob.java


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