tachyon.worker.eviction

Class EvictLRUBase

java.lang.Object

tachyon.worker.eviction.EvictLRUBase

All Implemented Interfaces:

EvictStrategy

Direct Known Subclasses:

EvictLRU, EvictPartialLRU

public abstract class EvictLRUBase
extends Object
implements EvictStrategy

Base class for evicting blocks by LRU strategy.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	EvictLRUBase(boolean lastTier)

Method Summary

Methods

Modifier and Type	Method and Description
protected boolean	blockEvictable(long blockId, Set<Integer> pinList) Check if current block can be evicted
protected Pair<Long,Long>	getLRUBlock(StorageDir curDir, Collection<Long> toEvictBlockIds, Set<Integer> pinList) Get the oldest access information of certain StorageDir

Methods inherited from class java.lang.Object

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

Methods inherited from interface tachyon.worker.eviction.EvictStrategy

getDirCandidate

Constructor Detail

EvictLRUBase

protected EvictLRUBase(boolean lastTier)

Method Detail

blockEvictable

protected boolean blockEvictable(long blockId,
                     Set<Integer> pinList)

Check if current block can be evicted

Parameters:

blockId - the Id of the block

pinList - the list of the pinned files

Returns:

true if the block can be evicted, false otherwise

getLRUBlock

protected Pair<Long,Long> getLRUBlock(StorageDir curDir,
                          Collection<Long> toEvictBlockIds,
                          Set<Integer> pinList)

Get the oldest access information of certain StorageDir

Parameters:

curDir - current StorageDir

toEvictBlockIds - the Ids of blocks that have been selected to be evicted

pinList - list of pinned files

Returns:

the oldest access information of current StorageDir