org.apache.hadoop.hbase.regionserver

类 MemStoreCompactor

java.lang.Object

org.apache.hadoop.hbase.regionserver.MemStoreCompactor

@InterfaceAudience.Private
public class MemStoreCompactor
extends Object

The ongoing MemStore Compaction manager, dispatches a solo running compaction and interrupts the compaction if requested. The compaction is interrupted and stopped by CompactingMemStore, for example when another compaction needs to be started. Prior to compaction the MemStoreCompactor evaluates the compacting ratio and aborts the compaction if it is not worthy. The MemStoreScanner is used to traverse the compaction pipeline. The MemStoreScanner is included in internal store scanner, where all compaction logic is implemented. Threads safety: It is assumed that the compaction pipeline is immutable, therefore no special synchronization is required.

字段概要

字段

限定符和类型	字段和说明
static long	DEEP_OVERHEAD

构造器概要

构造器

构造器和说明
MemStoreCompactor(CompactingMemStore compactingMemStore, MemoryCompactionPolicy compactionPolicy)

方法概要

限定符和类型	方法和说明
void	resetStats()
boolean	start() ---------------------------------------------------------------------- The request to dispatch the compaction asynchronous task.
void	stop() ---------------------------------------------------------------------- The request to cancel the compaction asynchronous task The compaction may still happen if the request was sent too late Non-blocking request
String	toString()

从类继承的方法 java.lang.Object

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

字段详细资料

DEEP_OVERHEAD

public static final long DEEP_OVERHEAD

构造器详细资料

MemStoreCompactor

public MemStoreCompactor(CompactingMemStore compactingMemStore,
                         MemoryCompactionPolicy compactionPolicy)
                  throws IllegalArgumentIOException

抛出:

IllegalArgumentIOException

方法详细资料

toString

public String toString()

覆盖:

toString 在类中 Object

start

public boolean start()
              throws IOException

---------------------------------------------------------------------- The request to dispatch the compaction asynchronous task. The method returns true if compaction was successfully dispatched, or false if there is already an ongoing compaction or no segments to compact.

抛出:

IOException

stop

public void stop()

---------------------------------------------------------------------- The request to cancel the compaction asynchronous task The compaction may still happen if the request was sent too late Non-blocking request

resetStats

public void resetStats()