org.apache.hadoop.hbase.regionserver

Class DateTieredStoreEngine.DateTieredCompactionContext

java.lang.Object

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

org.apache.hadoop.hbase.regionserver.DateTieredStoreEngine.DateTieredCompactionContext

Enclosing class:

DateTieredStoreEngine

private final class DateTieredStoreEngine.DateTieredCompactionContext
extends CompactionContext

Field Summary

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

request

Constructor Summary

Constructors

Modifier	Constructor and Description
private	DateTieredCompactionContext()

Method Summary

Modifier and Type	Method and Description
List<org.apache.hadoop.fs.Path>	compact(ThroughputController throughputController, User user)
void	forceSelect(CompactionRequestImpl request) Forces external selection to be applied for this compaction.
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

getRequest, hasSelection

Methods inherited from class java.lang.Object

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

Constructor Detail

DateTieredCompactionContext

private DateTieredCompactionContext()

Method Detail

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.

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

forceSelect

public void forceSelect(CompactionRequestImpl request)

Description copied from class: CompactionContext

Forces external selection to be applied for this compaction.

Overrides:

forceSelect in class CompactionContext

Parameters:

request - The pre-cooked request with selection and other settings.

compact

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

Specified by:

compact in class CompactionContext

Throws:

IOException