org.apache.hadoop.mapred
Class ClusterStatus

java.lang.Object
  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