org.apache.hadoop.mapred
Class ClusterStatus

java.lang.Object
  extended by org.apache.hadoop.mapred.ClusterStatus
All Implemented Interfaces:
Writable

public class ClusterStatus
extends Object
implements Writable

Summarizes the size and current state of the cluster.

Author:
Owen O'Malley

Method Summary
 int getMapTasks()
          The number of currently running map tasks.
 int getMaxTasks()
          The maximum capacity for running tasks in the cluster.
 int getReduceTasks()
          The number of current running reduce tasks.
 int getTaskTrackers()
          The number of task trackers in the cluster.
 void readFields(DataInput in)
          Reads the fields of this object from in.
 void write(DataOutput out)
          Writes the fields of this object to out.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

getTaskTrackers

public int getTaskTrackers()
The number of task trackers in the cluster.


getMapTasks

public int getMapTasks()
The number of currently running map tasks.


getReduceTasks

public int getReduceTasks()
The number of current running reduce tasks.


getMaxTasks

public int getMaxTasks()
The maximum capacity for running tasks in the cluster.


write

public void write(DataOutput out)
           throws IOException
Description copied from interface: Writable
Writes the fields of this object to out.

Specified by:
write in interface Writable
Throws:
IOException

readFields

public void readFields(DataInput in)
                throws IOException
Description copied from interface: Writable
Reads the fields of this object from in. For efficiency, implementations should attempt to re-use storage in the existing object where possible.

Specified by:
readFields in interface Writable
Throws:
IOException


Copyright © 2006 The Apache Software Foundation