本文整理汇总了Java中org.apache.hadoop.mapreduce.ClusterMetrics.getReduceSlotCapacity方法的典型用法代码示例。如果您正苦于以下问题：Java ClusterMetrics.getReduceSlotCapacity方法的具体用法？Java ClusterMetrics.getReduceSlotCapacity怎么用？Java ClusterMetrics.getReduceSlotCapacity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类org.apache.hadoop.mapreduce.ClusterMetrics的用法示例。
在下文中一共展示了ClusterMetrics.getReduceSlotCapacity方法的2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: chooseMachine
import org.apache.hadoop.mapreduce.ClusterMetrics; //导入方法依赖的package包/类
/**
* 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);
}
}
示例2: getClusterStatus
import org.apache.hadoop.mapreduce.ClusterMetrics; //导入方法依赖的package包/类
/**
* Get status information about the Map-Reduce cluster.
*
* @return the status information about the Map-Reduce cluster as an object
* of {@link ClusterStatus}.
* @throws IOException
*/
public ClusterStatus getClusterStatus() throws IOException {
try {
ClusterMetrics metrics = cluster.getClusterStatus();
return new ClusterStatus(metrics.getTaskTrackerCount(),
metrics.getBlackListedTaskTrackerCount(), cluster.getTaskTrackerExpiryInterval(),
metrics.getOccupiedMapSlots(),
metrics.getOccupiedReduceSlots(), metrics.getMapSlotCapacity(),
metrics.getReduceSlotCapacity(),
cluster.getJobTrackerStatus(),
metrics.getDecommissionedTaskTrackerCount());
} catch (InterruptedException ie) {
throw new IOException(ie);
}
}