tachyon.worker.eviction

Class EvictLRU

java.lang.Object

tachyon.worker.eviction.EvictLRUBase

tachyon.worker.eviction.EvictLRU

All Implemented Interfaces:

EvictStrategy

public final class EvictLRU
extends EvictLRUBase

Used to evict old blocks among several StorageDirs by LRU strategy.

Constructor Summary

Constructors

Constructor and Description
EvictLRU(boolean lastTier)

Method Summary

Methods

Modifier and Type	Method and Description
Pair<StorageDir,List<BlockInfo>>	getDirCandidate(StorageDir[] storageDirs, Set<Integer> pinList, long requestBytes) Get StorageDir allocated and also get blocks to be evicted among StorageDir candidates

Methods inherited from class tachyon.worker.eviction.EvictLRUBase

blockEvictable, getLRUBlock

Methods inherited from class java.lang.Object

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

Constructor Detail

EvictLRU

public EvictLRU(boolean lastTier)

Method Detail

getDirCandidate

public Pair<StorageDir,List<BlockInfo>> getDirCandidate(StorageDir[] storageDirs,
                                               Set<Integer> pinList,
                                               long requestBytes)

Description copied from interface: EvictStrategy

Get StorageDir allocated and also get blocks to be evicted among StorageDir candidates

Parameters:

storageDirs - StorageDir candidates that the space will be allocated in

pinList - list of pinned file

requestBytes - requested space size in bytes

Returns:

Pair of StorageDir allocated and blockInfoList which contains information of blocks to be evicted, null if no allocated directory is found