org.apache.flink.configuration

Class CheckpointingOptions

java.lang.Object

org.apache.flink.configuration.CheckpointingOptions

public class CheckpointingOptions
extends Object

A collection of all configuration options that relate to checkpoints and savepoints.

Field Summary

Fields

Modifier and Type	Field and Description
static ConfigOption<Boolean>	ASYNC_SNAPSHOTS Option whether the state backend should use an asynchronous snapshot method where possible and configurable.
static ConfigOption<String>	CHECKPOINTS_DIRECTORY The default directory used for storing the data files and meta data of checkpoints in a Flink supported filesystem.
static ConfigOption<MemorySize>	FS_SMALL_FILE_THRESHOLD The minimum size of state data files.
static ConfigOption<Integer>	FS_WRITE_BUFFER_SIZE The default size of the write buffer for the checkpoint streams that write to file systems.
static ConfigOption<Boolean>	INCREMENTAL_CHECKPOINTS Option whether the state backend should create incremental checkpoints, if possible.
static ConfigOption<Boolean>	LOCAL_RECOVERY This option configures local recovery for this state backend.
static ConfigOption<String>	LOCAL_RECOVERY_TASK_MANAGER_STATE_ROOT_DIRS The config parameter defining the root directories for storing file-based state for local recovery.
static ConfigOption<Integer>	MAX_RETAINED_CHECKPOINTS The maximum number of completed checkpoints to retain.
static ConfigOption<String>	SAVEPOINT_DIRECTORY The default directory for savepoints.
static ConfigOption<String>	STATE_BACKEND The state backend to be used to store and checkpoint state.

Constructor Summary

Constructors

Constructor and Description
CheckpointingOptions()

Method Summary

Methods inherited from class java.lang.Object

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

Field Detail

STATE_BACKEND

public static final ConfigOption<String> STATE_BACKEND

The state backend to be used to store and checkpoint state.

MAX_RETAINED_CHECKPOINTS

public static final ConfigOption<Integer> MAX_RETAINED_CHECKPOINTS

The maximum number of completed checkpoints to retain.

ASYNC_SNAPSHOTS

public static final ConfigOption<Boolean> ASYNC_SNAPSHOTS

Option whether the state backend should use an asynchronous snapshot method where possible and configurable.

Some state backends may not support asynchronous snapshots, or only support asynchronous snapshots, and ignore this option.

INCREMENTAL_CHECKPOINTS

public static final ConfigOption<Boolean> INCREMENTAL_CHECKPOINTS

Option whether the state backend should create incremental checkpoints, if possible. For an incremental checkpoint, only a diff from the previous checkpoint is stored, rather than the complete checkpoint state.

Once enabled, the state size shown in web UI or fetched from rest API only represents the delta checkpoint size instead of full checkpoint size.

Some state backends may not support incremental checkpoints and ignore this option.

LOCAL_RECOVERY

public static final ConfigOption<Boolean> LOCAL_RECOVERY

This option configures local recovery for this state backend. By default, local recovery is deactivated.

Local recovery currently only covers keyed state backends. Currently, MemoryStateBackend does not support local recovery and ignore this option.

LOCAL_RECOVERY_TASK_MANAGER_STATE_ROOT_DIRS

public static final ConfigOption<String> LOCAL_RECOVERY_TASK_MANAGER_STATE_ROOT_DIRS

The config parameter defining the root directories for storing file-based state for local recovery.

Local recovery currently only covers keyed state backends. Currently, MemoryStateBackend does not support local recovery and ignore this option.

SAVEPOINT_DIRECTORY

public static final ConfigOption<String> SAVEPOINT_DIRECTORY

The default directory for savepoints. Used by the state backends that write savepoints to file systems (MemoryStateBackend, FsStateBackend, RocksDBStateBackend).

CHECKPOINTS_DIRECTORY

public static final ConfigOption<String> CHECKPOINTS_DIRECTORY

The default directory used for storing the data files and meta data of checkpoints in a Flink supported filesystem. The storage path must be accessible from all participating processes/nodes(i.e. all TaskManagers and JobManagers).

FS_SMALL_FILE_THRESHOLD

public static final ConfigOption<MemorySize> FS_SMALL_FILE_THRESHOLD

The minimum size of state data files. All state chunks smaller than that are stored inline in the root checkpoint metadata file.

FS_WRITE_BUFFER_SIZE

public static final ConfigOption<Integer> FS_WRITE_BUFFER_SIZE

The default size of the write buffer for the checkpoint streams that write to file systems.

Constructor Detail

CheckpointingOptions

public CheckpointingOptions()