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java.lang.Objectorg.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| Field Summary | |
|---|---|
static long |
UNINITIALIZED_MEMORY_VALUE
|
| Method Summary | |
|---|---|
Collection<String> |
getActiveTrackerNames()
Get the names of active task trackers in the cluster. |
Collection<String> |
getBlacklistedTrackerNames()
Get the names of blacklisted task trackers in the cluster. |
int |
getBlacklistedTrackers()
Get the number of blacklisted task trackers in the cluster. |
Collection<String> |
getGraylistedTrackerNames()
Get the names of graylisted task trackers in the cluster. |
int |
getGraylistedTrackers()
Get the number of graylisted task trackers in the cluster. |
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. |
long |
getMaxMemory()
Deprecated. |
int |
getMaxReduceTasks()
Get the maximum capacity for running reduce tasks in the cluster. |
int |
getNumExcludedNodes()
Get the number of excluded hosts in the cluster. |
int |
getReduceTasks()
Get the number of currently running reduce tasks in the cluster. |
int |
getTaskTrackers()
Get the number of active task trackers in the cluster. |
long |
getTTExpiryInterval()
Get the tasktracker expiry interval for the cluster |
long |
getUsedMemory()
Deprecated. |
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 |
| Field Detail |
|---|
public static final long UNINITIALIZED_MEMORY_VALUE
| Method Detail |
|---|
public int getTaskTrackers()
public Collection<String> getActiveTrackerNames()
public Collection<String> getBlacklistedTrackerNames()
public int getBlacklistedTrackers()
public Collection<String> getGraylistedTrackerNames()
public int getGraylistedTrackers()
public int getNumExcludedNodes()
public long getTTExpiryInterval()
public int getMapTasks()
public int getReduceTasks()
public int getMaxMapTasks()
public int getMaxReduceTasks()
public JobTracker.State getJobTrackerState()
JobTracker,
as JobTracker.State
JobTracker.@Deprecated public long getUsedMemory()
JobTracker
JobTracker@Deprecated public long getMaxMemory()
JobTracker
JobTracker
public void write(DataOutput out)
throws IOException
Writableout.
write in interface Writableout - DataOuput to serialize this object into.
IOException
public void readFields(DataInput in)
throws IOException
Writablein.
For efficiency, implementations should attempt to re-use storage in the existing object where possible.
readFields in interface Writablein - DataInput to deseriablize this object from.
IOException
|
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