org.apache.hadoop.hbase.regionserver
Class 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.

Nested Class Summary

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.

Field Summary

protected org.apache.hadoop.conf.Configuration	conf
protected Store	store

Constructor Summary

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

Method Summary

protected InternalScanner	createScanner(SortedSet<KeyValue> snapshot, long smallestReadPoint) Creates the scanner for flushing snapshot.
protected void	finalizeWriter(StoreFile.Writer writer, long cacheFlushSeqNum, MonitoredTask status)
List<org.apache.hadoop.fs.Path>	flushSnapshot(SortedSet<KeyValue> snapshot, long cacheFlushSeqNum, TimeRangeTracker tracker, AtomicLong flushedSize, MonitoredTask status) Turns a snapshot of memstore into a set of store files.
protected long	performFlush(InternalScanner scanner, Compactor.CellSink sink, long smallestReadPoint) Performs memstore flush, writing data from scanner into sink.

Methods inherited from class java.lang.Object

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

Field Detail

conf

protected org.apache.hadoop.conf.Configuration conf

store

protected Store store

Constructor Detail

StripeStoreFlusher

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

Method Detail

flushSnapshot

public List<org.apache.hadoop.fs.Path> flushSnapshot(SortedSet<KeyValue> snapshot,
                                                     long cacheFlushSeqNum,
                                                     TimeRangeTracker tracker,
                                                     AtomicLong flushedSize,
                                                     MonitoredTask status)
                                              throws IOException

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

Parameters:

snapshot - Memstore snapshot.

cacheFlushSeqNum - Log cache flush sequence number.

tracker - Time range tracker from the memstore pertaining to the snapshot.

flushedSize - Out parameter for the size of the KVs flushed.

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

Returns:

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

Throws:

IOException

finalizeWriter

protected void finalizeWriter(StoreFile.Writer writer,
                              long cacheFlushSeqNum,
                              MonitoredTask status)
                       throws IOException

Throws:

IOException

createScanner

protected InternalScanner createScanner(SortedSet<KeyValue> snapshot,
                                        long smallestReadPoint)
                                 throws IOException

Creates the scanner for flushing snapshot. Also calls coprocessors.

Returns:

The scanner; null if coprocessor is canceling the flush.

Throws:

IOException

performFlush

protected long performFlush(InternalScanner scanner,
                            Compactor.CellSink sink,
                            long smallestReadPoint)
                     throws IOException

Performs memstore flush, writing data from scanner into sink.

Parameters:

scanner - Scanner to get data from.

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

smallestReadPoint - Smallest read point used for the flush.

Returns:

Bytes flushed.

Throws:

IOException