org.apache.flink.runtime.checkpoint

类 CheckpointStatsTracker

java.lang.Object

org.apache.flink.runtime.checkpoint.CheckpointStatsTracker

public class CheckpointStatsTracker
extends Object

Tracker for checkpoint statistics.

This is tightly integrated with the CheckpointCoordinator in order to ease the gathering of fine-grained statistics.

The tracked stats include summary counts, a detailed history of recent and in progress checkpoints as well as summaries about the size, duration and more of recent checkpoints.

Data is gathered via callbacks in the CheckpointCoordinator and related classes like PendingCheckpoint and CompletedCheckpoint, which receive the raw stats data in the first place.

The statistics are accessed via createSnapshot() and exposed via both the web frontend and the Metric system.

构造器概要

构造器

构造器和说明
CheckpointStatsTracker(int numRememberedCheckpoints, org.apache.flink.metrics.MetricGroup metricGroup) Creates a new checkpoint stats tracker.

方法概要

限定符和类型	方法和说明
CheckpointStatsSnapshot	createSnapshot() Creates a new snapshot of the available stats.
PendingCheckpointStats	getPendingCheckpointStats(long checkpointId)
void	reportFailedCheckpointsWithoutInProgress() Callback when a checkpoint failure without in progress checkpoint.
void	reportIncompleteStats(long checkpointId, ExecutionVertex vertex, CheckpointMetrics metrics)

从类继承的方法 java.lang.Object

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

构造器详细资料

CheckpointStatsTracker

public CheckpointStatsTracker(int numRememberedCheckpoints,
                              org.apache.flink.metrics.MetricGroup metricGroup)

Creates a new checkpoint stats tracker.

参数:

numRememberedCheckpoints - Maximum number of checkpoints to remember, including in progress ones.

metricGroup - Metric group for exposed metrics

方法详细资料

createSnapshot

public CheckpointStatsSnapshot createSnapshot()

Creates a new snapshot of the available stats.

返回:

The latest statistics snapshot.

reportFailedCheckpointsWithoutInProgress

public void reportFailedCheckpointsWithoutInProgress()

Callback when a checkpoint failure without in progress checkpoint. For example, it should be callback when triggering checkpoint failure before creating PendingCheckpoint.

getPendingCheckpointStats

public PendingCheckpointStats getPendingCheckpointStats(long checkpointId)

reportIncompleteStats

public void reportIncompleteStats(long checkpointId,
                                  ExecutionVertex vertex,
                                  CheckpointMetrics metrics)