org.apache.hadoop.hbase.regionserver

类 StripeStoreFlusher

java.lang.Object

org.apache.hadoop.hbase.regionserver.StripeStoreFlusher

@InterfaceAudience.Private
public class StripeStoreFlusher
extends Object

Stripe implementation of StoreFlusher. Flushes files either into L0 file w/o metadata, or into separate striped files, avoiding L0.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	StripeStoreFlusher.BoundaryStripeFlushRequest Stripe flush request wrapper based on boundaries.
static class	StripeStoreFlusher.SizeStripeFlushRequest Stripe flush request wrapper based on size.
static class	StripeStoreFlusher.StripeFlushRequest Stripe flush request wrapper that writes a non-striped file.

字段概要

字段

限定符和类型	字段和说明
protected org.apache.hadoop.conf.Configuration	conf
protected HStore	store

构造器概要

构造器

构造器和说明
StripeStoreFlusher(org.apache.hadoop.conf.Configuration conf, HStore store, StripeCompactionPolicy policy, StripeStoreFileManager stripes)

方法概要

限定符和类型	方法和说明
protected InternalScanner	createScanner(List<KeyValueScanner> snapshotScanners, long smallestReadPoint, FlushLifeCycleTracker tracker) Creates the scanner for flushing snapshot.
protected void	finalizeWriter(StoreFileWriter writer, long cacheFlushSeqNum, MonitoredTask status)
List<org.apache.hadoop.fs.Path>	flushSnapshot(MemStoreSnapshot snapshot, long cacheFlushSeqNum, MonitoredTask status, ThroughputController throughputController, FlushLifeCycleTracker tracker) Turns a snapshot of memstore into a set of store files.
protected void	performFlush(InternalScanner scanner, CellSink sink, long smallestReadPoint, ThroughputController throughputController) Performs memstore flush, writing data from scanner into sink.

从类继承的方法 java.lang.Object

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

字段详细资料

conf

protected org.apache.hadoop.conf.Configuration conf

store

protected HStore store

构造器详细资料

StripeStoreFlusher

public StripeStoreFlusher(org.apache.hadoop.conf.Configuration conf,
                          HStore store,
                          StripeCompactionPolicy policy,
                          StripeStoreFileManager stripes)

方法详细资料

flushSnapshot

public List<org.apache.hadoop.fs.Path> flushSnapshot(MemStoreSnapshot snapshot,
                                                     long cacheFlushSeqNum,
                                                     MonitoredTask status,
                                                     ThroughputController throughputController,
                                                     FlushLifeCycleTracker tracker)
                                              throws IOException

Turns a snapshot of memstore into a set of store files.

参数:

snapshot - Memstore snapshot.

cacheFlushSeqNum - Log cache flush sequence number.

status - Task that represents the flush operation and may be updated with status.

throughputController - A controller to avoid flush too fast

返回:

List of files written. Can be empty; must not be null.

抛出:

IOException

finalizeWriter

protected void finalizeWriter(StoreFileWriter writer,
                              long cacheFlushSeqNum,
                              MonitoredTask status)
                       throws IOException

抛出:

IOException

createScanner

protected final InternalScanner createScanner(List<KeyValueScanner> snapshotScanners,
                                              long smallestReadPoint,
                                              FlushLifeCycleTracker tracker)
                                       throws IOException

Creates the scanner for flushing snapshot. Also calls coprocessors.

参数:

snapshotScanners -

smallestReadPoint -

返回:

The scanner; null if coprocessor is canceling the flush.

抛出:

IOException

performFlush

protected void performFlush(InternalScanner scanner,
                            CellSink sink,
                            long smallestReadPoint,
                            ThroughputController throughputController)
                     throws IOException

Performs memstore flush, writing data from scanner into sink.

参数:

scanner - Scanner to get data from.

sink - Sink to write data to. Could be StoreFile.Writer.

smallestReadPoint - Smallest read point used for the flush.

throughputController - A controller to avoid flush too fast

抛出:

IOException