Package org.apache.ignite.internal.processors.cache.persistence.pagemem

Class RandomLruPageReplacementPolicy

java.lang.Object

org.apache.ignite.internal.processors.cache.persistence.pagemem.PageReplacementPolicy

org.apache.ignite.internal.processors.cache.persistence.pagemem.RandomLruPageReplacementPolicy

public class RandomLruPageReplacementPolicy
extends PageReplacementPolicy

Random-LRU page replacement policy implementation.

See Also:

PageReplacementMode.RANDOM_LRU

Field Summary

Fields

Modifier and Type	Field	Description
static int	RANDOM_PAGES_EVICT_NUM	Number of random pages that will be picked for eviction.

Fields inherited from class org.apache.ignite.internal.processors.cache.persistence.pagemem.PageReplacementPolicy

seg

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RandomLruPageReplacementPolicy(org.apache.ignite.internal.processors.cache.persistence.pagemem.PageMemoryImpl.Segment seg)

Method Summary

Modifier and Type	Method	Description
long	replace()	Finds page to replace.

Methods inherited from class org.apache.ignite.internal.processors.cache.persistence.pagemem.PageReplacementPolicy

onHit, onMiss, onRemove

Methods inherited from class java.lang.Object

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

Field Detail

RANDOM_PAGES_EVICT_NUM

public static final int RANDOM_PAGES_EVICT_NUM

Number of random pages that will be picked for eviction.

See Also:

Constant Field Values

Constructor Detail

RandomLruPageReplacementPolicy

protected RandomLruPageReplacementPolicy(org.apache.ignite.internal.processors.cache.persistence.pagemem.PageMemoryImpl.Segment seg)

Parameters:

seg - Page memory segment.

Method Detail

replace

public long replace()
             throws IgniteCheckedException

Finds page to replace. Note: This method always invoked under segment write lock.

Specified by:

replace in class PageReplacementPolicy

Returns:

Relative pointer to page.

Throws:

IgniteCheckedException