Package org.apache.hadoop.hbase.regionserver

Class VersionedSegmentsList

java.lang.Object

org.apache.hadoop.hbase.regionserver.VersionedSegmentsList

@Private
public class VersionedSegmentsList
extends Object

A list of segment managers coupled with the version of the memstore (version at the time it was created). This structure helps to guarantee that the compaction pipeline updates after the compaction is updated in a consistent (atomic) way. Specifically, swapping some of the elements in a compaction pipeline with a new compacted element is permitted only if the pipeline version is the same as the version attached to the elements.

Field Summary

Fields

Modifier and Type	Field	Description
private final List<ImmutableSegment>	storeSegments
private final long	version

Constructor Summary

Constructors

Constructor	Description
VersionedSegmentsList(List<ImmutableSegment> storeSegments, long version)

Method Summary

Modifier and Type	Method	Description
(package private) double	getEstimatedUniquesFrac()
int	getNumOfCells()
int	getNumOfSegments()
List<ImmutableSegment>	getStoreSegments()
long	getVersion()

Methods inherited from class java.lang.Object

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

Field Details

storeSegments

private final List<ImmutableSegment> storeSegments

version

private final long version

Constructor Details

VersionedSegmentsList

public VersionedSegmentsList(List<ImmutableSegment> storeSegments,
 long version)

Method Details

getStoreSegments

public List<ImmutableSegment> getStoreSegments()

getVersion

public long getVersion()

getNumOfCells

public int getNumOfCells()

getNumOfSegments

public int getNumOfSegments()

getEstimatedUniquesFrac

double getEstimatedUniquesFrac()