org.apache.hadoop.hbase.regionserver.compactions

Class CompactionPolicy

java.lang.Object

org.apache.hadoop.hbase.regionserver.compactions.CompactionPolicy

Direct Known Subclasses:

SortedCompactionPolicy, StripeCompactionPolicy

@InterfaceAudience.Private
public abstract class CompactionPolicy
extends Object

A compaction policy determines how to select files for compaction, how to compact them, and how to generate the compacted files.

Field Summary

Fields

Modifier and Type	Field and Description
protected CompactionConfiguration	comConf
protected StoreConfigInformation	storeConfigInfo

Constructor Summary

Constructors

Constructor and Description
CompactionPolicy(org.apache.hadoop.conf.Configuration conf, StoreConfigInformation storeConfigInfo)

Method Summary

Modifier and Type	Method and Description
CompactionConfiguration	getConf()
void	setConf(org.apache.hadoop.conf.Configuration conf) Inform the policy that some configuration has been change, so cached value should be updated it any.
abstract boolean	shouldPerformMajorCompaction(Collection<HStoreFile> filesToCompact)
abstract boolean	throttleCompaction(long compactionSize)

Methods inherited from class java.lang.Object

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

Field Detail

comConf

protected CompactionConfiguration comConf

storeConfigInfo

protected StoreConfigInformation storeConfigInfo

Constructor Detail

CompactionPolicy

public CompactionPolicy(org.apache.hadoop.conf.Configuration conf,
                        StoreConfigInformation storeConfigInfo)

Method Detail

shouldPerformMajorCompaction

public abstract boolean shouldPerformMajorCompaction(Collection<HStoreFile> filesToCompact)
                                              throws IOException

Parameters:

filesToCompact - Files to compact. Can be null.

Returns:

True if we should run a major compaction.

Throws:

IOException

throttleCompaction

public abstract boolean throttleCompaction(long compactionSize)

Parameters:

compactionSize - Total size of some compaction

Returns:

whether this should be a large or small compaction

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Inform the policy that some configuration has been change, so cached value should be updated it any.

getConf

public CompactionConfiguration getConf()

Returns:

The current compaction configuration settings.