Package org.apache.flink.runtime.checkpoint

Class TaskStateStats

java.lang.Object

org.apache.flink.runtime.checkpoint.TaskStateStats

All Implemented Interfaces:

Serializable

public class TaskStateStats
extends Object
implements Serializable

Statistics for a single task/operator that gathers all statistics of its subtasks and provides summary statistics about all subtasks.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TaskStateStats.TaskStateStatsSummary	Summary of the subtask stats of a single task/operator.

Method Summary

Modifier and Type	Method	Description
long	getCheckpointedSize()
long	getEndToEndDuration(long triggerTimestamp)	Returns the duration of this checkpoint at the task/operator calculated as the time since triggering until the latest acknowledged subtask or -1 if no subtask was acknowledged yet.
JobVertexID	getJobVertexId()
SubtaskStateStats	getLatestAcknowledgedSubtaskStats()
long	getLatestAckTimestamp()
int	getNumberOfAcknowledgedSubtasks()
int	getNumberOfSubtasks()
long	getPersistedDataStats()
long	getProcessedDataStats()
long	getStateSize()
SubtaskStateStats[]	getSubtaskStats()	Returns the stats for all subtasks.
TaskStateStats.TaskStateStatsSummary	getSummaryStats()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getJobVertexId

public JobVertexID getJobVertexId()

Returns:

ID of the operator the statistics belong to.

getNumberOfSubtasks

public int getNumberOfSubtasks()

getNumberOfAcknowledgedSubtasks

public int getNumberOfAcknowledgedSubtasks()

getLatestAcknowledgedSubtaskStats

@Nullable
public SubtaskStateStats getLatestAcknowledgedSubtaskStats()

Returns:

The latest acknowledged subtask stats or null if none was acknowledged yet.

getLatestAckTimestamp

public long getLatestAckTimestamp()

Returns:

Ack timestamp of the latest acknowledged subtask or -1 if none was acknowledged yet..

getCheckpointedSize

public long getCheckpointedSize()

Returns:

Total persisted size over all subtasks of this checkpoint.

getStateSize

public long getStateSize()

Returns:

Total checkpoint state size over all subtasks.

getProcessedDataStats

public long getProcessedDataStats()

getPersistedDataStats

public long getPersistedDataStats()

getEndToEndDuration

public long getEndToEndDuration(long triggerTimestamp)

Returns the duration of this checkpoint at the task/operator calculated as the time since triggering until the latest acknowledged subtask or -1 if no subtask was acknowledged yet.

Returns:

Duration of this checkpoint at the task/operator or -1 if no subtask was acknowledged yet.

getSubtaskStats

public SubtaskStateStats[] getSubtaskStats()

Returns the stats for all subtasks.

Elements of the returned array are null if no stats are available yet for the respective subtask.

Note: The returned array must not be modified.

Returns:

Array of subtask stats (elements are null if no stats available yet).

getSummaryStats

public TaskStateStats.TaskStateStatsSummary getSummaryStats()

Returns:

Summary of the subtask stats.