org.apache.hadoop.hbase.regionserver

Class DefaultStoreEngine.DefaultCompactionContext

java.lang.Object

org.apache.hadoop.hbase.regionserver.compactions.CompactionContext

org.apache.hadoop.hbase.regionserver.DefaultStoreEngine.DefaultCompactionContext

Enclosing class:

DefaultStoreEngine

private class DefaultStoreEngine.DefaultCompactionContext
extends CompactionContext

Field Summary

Fields inherited from class org.apache.hadoop.hbase.regionserver.compactions.CompactionContext

request

Constructor Summary

Constructors

Modifier	Constructor and Description
private	DefaultCompactionContext()

Method Summary

Modifier and Type	Method and Description
List<org.apache.hadoop.fs.Path>	compact(ThroughputController throughputController, User user)
List<HStoreFile>	preSelect(List<HStoreFile> filesCompacting) Called before coprocessor preCompactSelection and should filter the candidates for coprocessor; i.e.
boolean	select(List<HStoreFile> filesCompacting, boolean isUserCompaction, boolean mayUseOffPeak, boolean forceMajor) Called to select files for compaction.

Methods inherited from class org.apache.hadoop.hbase.regionserver.compactions.CompactionContext

forceSelect, getRequest, hasSelection

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultCompactionContext

private DefaultCompactionContext()

Method Detail

select

public boolean select(List<HStoreFile> filesCompacting,
                      boolean isUserCompaction,
                      boolean mayUseOffPeak,
                      boolean forceMajor)
               throws IOException

Description copied from class: CompactionContext

Called to select files for compaction. Must fill in the request field if successful.

Specified by:

select in class CompactionContext

Parameters:

filesCompacting - Files currently being compacted by other compactions.

isUserCompaction - Whether this is a user compaction.

mayUseOffPeak - Whether the underlying policy may assume it's off-peak hours.

forceMajor - Whether to force major compaction.

Returns:

Whether the selection succeeded. Selection may be empty and lead to no compaction.

Throws:

IOException

compact

public List<org.apache.hadoop.fs.Path> compact(ThroughputController throughputController,
                                               User user)
                                        throws IOException

Specified by:

compact in class CompactionContext

Throws:

IOException

preSelect

public List<HStoreFile> preSelect(List<HStoreFile> filesCompacting)

Description copied from class: CompactionContext

Called before coprocessor preCompactSelection and should filter the candidates for coprocessor; i.e. exclude the files that definitely cannot be compacted at this time.

Specified by:

preSelect in class CompactionContext

Parameters:

filesCompacting - files currently compacting

Returns:

the list of files that can theoretically be compacted.