org.apache.flink.runtime.checkpoint.SubtaskStateStats Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
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* limitations under the License.
*/
package org.apache.flink.runtime.checkpoint;
import java.io.Serializable;
import static org.apache.flink.util.Preconditions.checkArgument;
/**
* Statistics for a single subtask that is part of a checkpoint.
*
* Collects data that is spread over different close places: {@link CheckpointMetaData}, {@link
* SubtaskState}, and {@link PendingCheckpoint}.
*
*
This is the smallest immutable unit of the stats.
*/
public class SubtaskStateStats implements Serializable {
private static final long serialVersionUID = 8928594531621862214L;
private final int subtaskIndex;
/** Timestamp when the ack from this sub task was received at the coordinator. */
private final long ackTimestamp;
/** Size of the checkpointed state at this subtask. */
private final long stateSize;
/** Checkpoint duration at the operator (sync part) in milliseconds. */
private final long syncCheckpointDuration;
/** Checkpoint duration at the operator (async part) in milliseconds. */
private final long asyncCheckpointDuration;
private final long processedData;
private final long persistedData;
/** Alignment duration in milliseconds. */
private final long alignmentDuration;
/** Checkpoint start delay in milliseconds. */
private final long checkpointStartDelay;
/** Is the checkpoint completed as an unaligned checkpoint. */
private final boolean unalignedCheckpoint;
/** Is the checkpoint completed by this subtask. */
private final boolean completed;
SubtaskStateStats(int subtaskIndex, long ackTimestamp) {
this(subtaskIndex, ackTimestamp, 0, 0, 0, 0, 0, 0, 0, false, true);
}
SubtaskStateStats(
int subtaskIndex,
long ackTimestamp,
long stateSize,
long syncCheckpointDuration,
long asyncCheckpointDuration,
long processedData,
long persistedData,
long alignmentDuration,
long checkpointStartDelay,
boolean unalignedCheckpoint,
boolean completed) {
checkArgument(subtaskIndex >= 0, "Negative subtask index");
this.subtaskIndex = subtaskIndex;
checkArgument(stateSize >= 0, "Negative state size");
this.stateSize = stateSize;
this.ackTimestamp = ackTimestamp;
this.syncCheckpointDuration = syncCheckpointDuration;
this.asyncCheckpointDuration = asyncCheckpointDuration;
this.processedData = processedData;
this.persistedData = persistedData;
this.alignmentDuration = alignmentDuration;
this.checkpointStartDelay = checkpointStartDelay;
this.unalignedCheckpoint = unalignedCheckpoint;
this.completed = completed;
}
public int getSubtaskIndex() {
return subtaskIndex;
}
/**
* Returns the size of the checkpointed state at this subtask.
*
* @return Checkpoint state size of the sub task.
*/
public long getStateSize() {
return stateSize;
}
/**
* Returns the timestamp when the acknowledgement of this subtask was received at the
* coordinator.
*
* @return ACK timestamp at the coordinator.
*/
public long getAckTimestamp() {
return ackTimestamp;
}
/**
* Computes the duration since the given trigger timestamp.
*
*
If the trigger timestamp is greater than the ACK timestamp, this returns 0.
*
* @param triggerTimestamp Trigger timestamp of the checkpoint.
* @return Duration since the given trigger timestamp.
*/
public long getEndToEndDuration(long triggerTimestamp) {
return Math.max(0, ackTimestamp - triggerTimestamp);
}
/**
* @return Duration of the synchronous part of the checkpoint or -1 if the runtime
* did not report this.
*/
public long getSyncCheckpointDuration() {
return syncCheckpointDuration;
}
/**
* @return Duration of the asynchronous part of the checkpoint or -1 if the runtime
* did not report this.
*/
public long getAsyncCheckpointDuration() {
return asyncCheckpointDuration;
}
/** @return the total number of processed bytes during the checkpoint. */
public long getProcessedData() {
return processedData;
}
/** @return the total number of persisted bytes during the checkpoint. */
public long getPersistedData() {
return persistedData;
}
/**
* @return Duration of the stream alignment (for exactly-once only) or -1 if the
* runtime did not report this.
*/
public long getAlignmentDuration() {
return alignmentDuration;
}
public long getCheckpointStartDelay() {
return checkpointStartDelay;
}
public boolean getUnalignedCheckpoint() {
return unalignedCheckpoint;
}
public boolean isCompleted() {
return completed;
}
}