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java.lang.Object org.apache.hadoop.mapred.ClusterStatus
public class ClusterStatus
Status information on the current state of the Map-Reduce cluster.
ClusterStatus
provides clients with information such as:
JobTracker
.
Clients can query for the latest ClusterStatus
, via
JobClient.getClusterStatus()
.
JobClient
Method Summary | |
---|---|
JobTracker.State |
getJobTrackerState()
Get the current state of the JobTracker ,
as JobTracker.State |
int |
getMapTasks()
Get the number of currently running map tasks in the cluster. |
int |
getMaxMapTasks()
Get the maximum capacity for running map tasks in the cluster. |
int |
getMaxReduceTasks()
Get the maximum capacity for running reduce tasks in the cluster. |
int |
getReduceTasks()
Get the number of currently running reduce tasks in the cluster. |
int |
getTaskTrackers()
Get the number of task trackers in the cluster. |
void |
readFields(DataInput in)
Deserialize the fields of this object from in . |
void |
write(DataOutput out)
Serialize 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 |
---|
public int getTaskTrackers()
public int getMapTasks()
public int getReduceTasks()
public int getMaxMapTasks()
public int getMaxReduceTasks()
public JobTracker.State getJobTrackerState()
JobTracker
,
as JobTracker.State
JobTracker
.public void write(DataOutput out) throws IOException
Writable
out
.
write
in interface Writable
out
- DataOuput
to serialize this object into.
IOException
public void readFields(DataInput in) throws IOException
Writable
in
.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields
in interface Writable
in
- DataInput
to deseriablize this object from.
IOException
|
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