org.apache.hadoop.hbase.regionserver

类 ImmutableMemStoreLAB

java.lang.Object

org.apache.hadoop.hbase.regionserver.ImmutableMemStoreLAB

所有已实现的接口:

MemStoreLAB

@InterfaceAudience.Private
public class ImmutableMemStoreLAB
extends Object
implements MemStoreLAB

A MemStoreLAB implementation which wraps N MemStoreLABs. Its main duty is in proper managing the close of the individual MemStoreLAB. This is treated as an immutable one and so do not allow to add any more Cells into it. copyCellInto(Cell) throws Exception

字段概要

从接口继承的字段 org.apache.hadoop.hbase.regionserver.MemStoreLAB

CHUNK_POOL_INITIALSIZE_KEY, CHUNK_POOL_MAXSIZE_KEY, CHUNK_SIZE_DEFAULT, CHUNK_SIZE_KEY, INDEX_CHUNK_PERCENTAGE_DEFAULT, INDEX_CHUNK_PERCENTAGE_KEY, MAX_ALLOC_DEFAULT, MAX_ALLOC_KEY, MSLAB_CLASS_NAME, POOL_INITIAL_SIZE_DEFAULT, POOL_MAX_SIZE_DEFAULT, USEMSLAB_DEFAULT, USEMSLAB_KEY

构造器概要

构造器

构造器和说明
ImmutableMemStoreLAB(List<MemStoreLAB> mslabs)

方法概要

限定符和类型	方法和说明
void	close() Close instance since it won't be used any more, try to put the chunks back to pool
Cell	copyCellInto(Cell cell) Allocates slice in this LAB and copy the passed Cell into this area.
void	decScannerCount() Called when closing a scanner on the data of this MemStoreLAB
Cell	forceCopyOfBigCellInto(Cell cell) The process of merging assumes all cells are allocated on mslab.
Chunk	getNewExternalChunk(ChunkCreator.ChunkType chunkType)
Chunk	getNewExternalChunk(int size)
void	incScannerCount() Called when opening a scanner on the data of this MemStoreLAB
boolean	isOffHeap()
boolean	isOnHeap()

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.hadoop.hbase.regionserver.MemStoreLAB

isEnabled, newInstance

构造器详细资料

ImmutableMemStoreLAB

public ImmutableMemStoreLAB(List<MemStoreLAB> mslabs)

方法详细资料

copyCellInto

public Cell copyCellInto(Cell cell)

从接口复制的说明: MemStoreLAB

Allocates slice in this LAB and copy the passed Cell into this area. Returns new Cell instance over the copied the data. When this MemStoreLAB can not copy this Cell, it returns null.

指定者:

copyCellInto 在接口中 MemStoreLAB

forceCopyOfBigCellInto

public Cell forceCopyOfBigCellInto(Cell cell)

The process of merging assumes all cells are allocated on mslab. There is a rare case in which the first immutable segment, participating in a merge, is a CSLM. Since the CSLM hasn't been flattened yet, and there is no point in flattening it (since it is going to be merged), its big cells (for whom size > maxAlloc) must be copied into mslab. This method copies the passed cell into the first mslab in the mslabs list, returning either a new cell instance over the copied data, or null when this cell cannt be copied.

指定者:

forceCopyOfBigCellInto 在接口中 MemStoreLAB

getNewExternalChunk

public Chunk getNewExternalChunk(ChunkCreator.ChunkType chunkType)

指定者:

getNewExternalChunk 在接口中 MemStoreLAB

getNewExternalChunk

public Chunk getNewExternalChunk(int size)

指定者:

getNewExternalChunk 在接口中 MemStoreLAB

close

public void close()

从接口复制的说明: MemStoreLAB

Close instance since it won't be used any more, try to put the chunks back to pool

指定者:

close 在接口中 MemStoreLAB

incScannerCount

public void incScannerCount()

从接口复制的说明: MemStoreLAB

Called when opening a scanner on the data of this MemStoreLAB

指定者:

incScannerCount 在接口中 MemStoreLAB

decScannerCount

public void decScannerCount()

从接口复制的说明: MemStoreLAB

Called when closing a scanner on the data of this MemStoreLAB

指定者:

decScannerCount 在接口中 MemStoreLAB

isOnHeap

public boolean isOnHeap()

指定者:

isOnHeap 在接口中 MemStoreLAB

isOffHeap

public boolean isOffHeap()

指定者:

isOffHeap 在接口中 MemStoreLAB