Java Code Examples for org.apache.hadoop.mapreduce.ClusterMetrics#getReduceSlotCapacity()

The following examples show how to use org.apache.hadoop.mapreduce.ClusterMetrics#getReduceSlotCapacity() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: DistSum.java    From hadoop with Apache License 2.0 6 votes vote down vote up 
/**
 * Choose a Machine in runtime according to the cluster status.
 */
private Machine chooseMachine(Configuration conf) throws IOException {
  final int parts = conf.getInt(N_PARTS, Integer.MAX_VALUE);
  try {
    for(;; Thread.sleep(2000)) {
      //get cluster status
      final ClusterMetrics status = cluster.getClusterStatus();
      final int m = 
        status.getMapSlotCapacity() - status.getOccupiedMapSlots();
      final int r = 
        status.getReduceSlotCapacity() - status.getOccupiedReduceSlots();
      if (m >= parts || r >= parts) {
        //favor ReduceSide machine
        final Machine value = r >= parts?
            ReduceSide.INSTANCE: MapSide.INSTANCE;
        Util.out.println("  " + this + " is " + value + " (m=" + m + ", r=" + r + ")");
        return value;
      }
    }
  } catch (InterruptedException e) {
    throw new IOException(e);
  }    
}
Example 2
Source File: DistSum.java    From big-c with Apache License 2.0 6 votes vote down vote up 
/**
 * Choose a Machine in runtime according to the cluster status.
 */
private Machine chooseMachine(Configuration conf) throws IOException {
  final int parts = conf.getInt(N_PARTS, Integer.MAX_VALUE);
  try {
    for(;; Thread.sleep(2000)) {
      //get cluster status
      final ClusterMetrics status = cluster.getClusterStatus();
      final int m = 
        status.getMapSlotCapacity() - status.getOccupiedMapSlots();
      final int r = 
        status.getReduceSlotCapacity() - status.getOccupiedReduceSlots();
      if (m >= parts || r >= parts) {
        //favor ReduceSide machine
        final Machine value = r >= parts?
            ReduceSide.INSTANCE: MapSide.INSTANCE;
        Util.out.println("  " + this + " is " + value + " (m=" + m + ", r=" + r + ")");
        return value;
      }
    }
  } catch (InterruptedException e) {
    throw new IOException(e);
  }    
}