org.apache.flink.runtime.state.CheckpointedStateScope 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
*
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*/
package org.apache.flink.runtime.state;
/**
* The scope for a chunk of checkpointed state. Defines whether state is owned by one checkpoint, or
* whether it is shared by multiple checkpoints.
*
* Different checkpoint storage implementations may treat checkpointed state of different scopes
* differently, for example put it into different folders or tables.
*/
public enum CheckpointedStateScope {
/** Exclusive state belongs exclusively to one specific checkpoint / savepoint. */
EXCLUSIVE,
/**
* Shared state may belong to more than one checkpoint.
*
*
Shared state is typically used for incremental or differential checkpointing methods,
* where only deltas are written, and state from prior checkpoints is referenced in newer
* checkpoints as well.
*/
SHARED
}