org.gridgain.grid.cache.store.local

Enum CacheFileLocalStoreWriteMode

java.lang.Object

java.lang.Enum<CacheFileLocalStoreWriteMode>

org.gridgain.grid.cache.store.local.CacheFileLocalStoreWriteMode

All Implemented Interfaces:

Serializable, Comparable<CacheFileLocalStoreWriteMode>

public enum CacheFileLocalStoreWriteMode
extends Enum<CacheFileLocalStoreWriteMode>

Write mode for file local store. Defines when and how internal buffers will be flushed to the file system. Delay for buffered modes can be configured by CacheFileLocalStore.setWriteDelay(long) method.

See Also:

CacheFileLocalStore.setWriteMode(CacheFileLocalStoreWriteMode)

Enum Constant Summary

Enum Constants

Enum Constant and Description
ASYNC_BUFFERED Store will not attempt to flush buffers until they are full or flush will occur in a background thread after the specified delay.
SYNC Store will attempt to flush buffers right away.
SYNC_BUFFERED Store will attempt to flush buffers only after the specified delay in hope that other threads will write to the same buffer for better batching effect.

Method Summary

Modifier and Type	Method and Description
static CacheFileLocalStoreWriteMode	valueOf(String name) Returns the enum constant of this type with the specified name.
static CacheFileLocalStoreWriteMode[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SYNC

public static final CacheFileLocalStoreWriteMode SYNC

Store will attempt to flush buffers right away. The mode is synchronous, the store will not loose updates in case of crash of the process. The store will have better latency for rare uncontended updates than SYNC_BUFFERED and the worst throughput for multithreaded updates.

ASYNC_BUFFERED

public static final CacheFileLocalStoreWriteMode ASYNC_BUFFERED

Store will not attempt to flush buffers until they are full or flush will occur in a background thread after the specified delay. The mode is asynchronous, thus it can loose delayed updates in case of crash of the process but it is the fastest in terms of both latency and throughput.

See Also:

CacheFileLocalStore.setWriteDelay(long)

SYNC_BUFFERED

public static final CacheFileLocalStoreWriteMode SYNC_BUFFERED

Store will attempt to flush buffers only after the specified delay in hope that other threads will write to the same buffer for better batching effect. The difference from ASYNC_BUFFERED is that flush always happens synchronously but not in a background thread. The mode is synchronous, the store will not loose updates. This mode trades latency for better multithreaded throughput.

See Also:

CacheFileLocalStore.setWriteDelay(long)

Method Detail

values

public static CacheFileLocalStoreWriteMode[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (CacheFileLocalStoreWriteMode c : CacheFileLocalStoreWriteMode.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static CacheFileLocalStoreWriteMode valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null