org.apache.flink.contrib.streaming.state

Class RocksDBMemoryConfiguration

java.lang.Object

org.apache.flink.contrib.streaming.state.RocksDBMemoryConfiguration

All Implemented Interfaces:

Serializable

public final class RocksDBMemoryConfiguration
extends Object
implements Serializable

The settings regarding RocksDBs memory usage.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RocksDBMemoryConfiguration()

Method Summary

Modifier and Type	Method and Description
static RocksDBMemoryConfiguration	fromOtherAndConfiguration(RocksDBMemoryConfiguration other, org.apache.flink.configuration.ReadableConfig config) Derives a RocksDBMemoryConfiguration from another object and a configuration.
org.apache.flink.configuration.MemorySize	getFixedMemoryPerSlot() Gets the fixed amount of memory to be shared between all RocksDB instances (in all tasks and operators) of a slot.
double	getHighPriorityPoolRatio() Gets the fraction of the total memory to be used for high priority blocks like indexes, dictionaries, etc.
double	getWriteBufferRatio() Gets the fraction of the total memory to be used for write buffers.
boolean	isUsingFixedMemoryPerSlot() Gets whether the state backend is configured to use a fixed amount of memory shared between all RocksDB instances (in all tasks and operators) of a slot.
boolean	isUsingManagedMemory() Gets whether the state backend is configured to use the managed memory of a slot for RocksDB.
void	setFixedMemoryPerSlot(org.apache.flink.configuration.MemorySize fixedMemoryPerSlot) Configures RocksDB to use a fixed amount of memory shared between all instances (operators) in a slot.
void	setFixedMemoryPerSlot(String totalMemoryPerSlotStr) Configures RocksDB to use a fixed amount of memory shared between all instances (operators) in a slot.
void	setHighPriorityPoolRatio(double highPriorityPoolRatio) Sets the fraction of the total memory to be used for high priority blocks like indexes, dictionaries, etc.
void	setUseManagedMemory(boolean useManagedMemory) Configures RocksDB to use the managed memory of a slot.
void	setWriteBufferRatio(double writeBufferRatio) Sets the fraction of the total memory to be used for write buffers.
void	validate() Validates if the configured options are valid with respect to one another.

Methods inherited from class java.lang.Object

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

Constructor Detail

RocksDBMemoryConfiguration

public RocksDBMemoryConfiguration()

Method Detail

setUseManagedMemory

public void setUseManagedMemory(boolean useManagedMemory)

Configures RocksDB to use the managed memory of a slot. See RocksDBOptions.USE_MANAGED_MEMORY for details.

setFixedMemoryPerSlot

public void setFixedMemoryPerSlot(org.apache.flink.configuration.MemorySize fixedMemoryPerSlot)

Configures RocksDB to use a fixed amount of memory shared between all instances (operators) in a slot. See RocksDBOptions.FIX_PER_SLOT_MEMORY_SIZE for details.

setFixedMemoryPerSlot

public void setFixedMemoryPerSlot(String totalMemoryPerSlotStr)

Configures RocksDB to use a fixed amount of memory shared between all instances (operators) in a slot. See setFixedMemoryPerSlot(MemorySize) for details.

setWriteBufferRatio

public void setWriteBufferRatio(double writeBufferRatio)

Sets the fraction of the total memory to be used for write buffers. This only has an effect is either setUseManagedMemory(boolean) or setFixedMemoryPerSlot(MemorySize) are set.

See RocksDBOptions.WRITE_BUFFER_RATIO for details.

setHighPriorityPoolRatio

public void setHighPriorityPoolRatio(double highPriorityPoolRatio)

Sets the fraction of the total memory to be used for high priority blocks like indexes, dictionaries, etc. This only has an effect is either setUseManagedMemory(boolean) or setFixedMemoryPerSlot(MemorySize) are set.

See RocksDBOptions.HIGH_PRIORITY_POOL_RATIO for details.

isUsingManagedMemory

public boolean isUsingManagedMemory()

Gets whether the state backend is configured to use the managed memory of a slot for RocksDB. See RocksDBOptions.USE_MANAGED_MEMORY for details.

isUsingFixedMemoryPerSlot

public boolean isUsingFixedMemoryPerSlot()

Gets whether the state backend is configured to use a fixed amount of memory shared between all RocksDB instances (in all tasks and operators) of a slot. See RocksDBOptions.USE_MANAGED_MEMORY for details.

getFixedMemoryPerSlot

@Nullable
public org.apache.flink.configuration.MemorySize getFixedMemoryPerSlot()

Gets the fixed amount of memory to be shared between all RocksDB instances (in all tasks and operators) of a slot. Null is not configured. See RocksDBOptions.USE_MANAGED_MEMORY for details.

getWriteBufferRatio

public double getWriteBufferRatio()

Gets the fraction of the total memory to be used for write buffers. This only has an effect is either setUseManagedMemory(boolean) or setFixedMemoryPerSlot(MemorySize) are set.

See RocksDBOptions.WRITE_BUFFER_RATIO for details.

getHighPriorityPoolRatio

public double getHighPriorityPoolRatio()

Gets the fraction of the total memory to be used for high priority blocks like indexes, dictionaries, etc. This only has an effect is either setUseManagedMemory(boolean) or setFixedMemoryPerSlot(MemorySize) are set.

See RocksDBOptions.HIGH_PRIORITY_POOL_RATIO for details.

validate

public void validate()

Validates if the configured options are valid with respect to one another.

fromOtherAndConfiguration

public static RocksDBMemoryConfiguration fromOtherAndConfiguration(RocksDBMemoryConfiguration other,
                                                                   org.apache.flink.configuration.ReadableConfig config)

Derives a RocksDBMemoryConfiguration from another object and a configuration. The values set on the other object take precedence, and the values from the configuration are used if no values are set on the other config object.