org.apache.hadoop.hbase.regionserver

Class DateTieredStoreEngine

java.lang.Object

org.apache.hadoop.hbase.regionserver.StoreEngine<DefaultStoreFlusher,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactionPolicy,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>

org.apache.hadoop.hbase.regionserver.DateTieredStoreEngine

@InterfaceAudience.Private
public class DateTieredStoreEngine
extends StoreEngine<DefaultStoreFlusher,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactionPolicy,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>

HBASE-15400 This store engine allows us to store data in date tiered layout with exponential sizing so that the more recent data has more granularity. Time-range scan will perform the best with most recent data. When data reach maxAge, they are compacted in fixed-size time windows for TTL and archiving. Please refer to design spec for more details. https://docs.google.com/document/d/1_AmlNb2N8Us1xICsTeGDLKIqL6T-oHoRLZ323MG_uy8/edit#heading=h.uk6y5pd3oqgx

Field Summary

Fields inherited from class org.apache.hadoop.hbase.regionserver.StoreEngine

compactionPolicy, compactor, STORE_ENGINE_CLASS_KEY, storeFileManager, storeFlusher

Constructor Summary

Constructors

Constructor and Description
DateTieredStoreEngine()

Method Summary

Modifier and Type	Method and Description
org.apache.hadoop.hbase.regionserver.compactions.CompactionContext	createCompaction() Creates an instance of a compaction context specific to this engine.
protected void	createComponents(org.apache.hadoop.conf.Configuration conf, HStore store, CellComparator kvComparator) Create the StoreEngine's components.
boolean	needsCompaction(List<HStoreFile> filesCompacting)

Methods inherited from class org.apache.hadoop.hbase.regionserver.StoreEngine

create, getCompactionPolicy, getCompactor, getStoreFileManager, getStoreFlusher

Methods inherited from class java.lang.Object

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

Constructor Detail

DateTieredStoreEngine

public DateTieredStoreEngine()

Method Detail

needsCompaction

public boolean needsCompaction(List<HStoreFile> filesCompacting)

Specified by:

needsCompaction in class StoreEngine<DefaultStoreFlusher,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactionPolicy,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>

Parameters:

filesCompacting - Files currently compacting

Returns:

whether a compaction selection is possible

createCompaction

public org.apache.hadoop.hbase.regionserver.compactions.CompactionContext createCompaction()
                                                                                    throws IOException

Description copied from class: StoreEngine

Creates an instance of a compaction context specific to this engine. Doesn't actually select or start a compaction. See CompactionContext class comment.

Specified by:

createCompaction in class StoreEngine<DefaultStoreFlusher,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactionPolicy,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>

Returns:

New CompactionContext object.

Throws:

IOException

createComponents

protected void createComponents(org.apache.hadoop.conf.Configuration conf,
                                HStore store,
                                CellComparator kvComparator)
                         throws IOException

Description copied from class: StoreEngine

Create the StoreEngine's components.

Specified by:

createComponents in class StoreEngine<DefaultStoreFlusher,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactionPolicy,org.apache.hadoop.hbase.regionserver.compactions.DateTieredCompactor,org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager>

Throws:

IOException