org.apache.flink.runtime.state.CheckpointedStateScope Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
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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
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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
}