org.apache.hadoop.hbase.regionserver

Class StripeStoreEngine.StripeCompaction

java.lang.Object

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

org.apache.hadoop.hbase.regionserver.StripeStoreEngine.StripeCompaction

Enclosing class:

StripeStoreEngine

private class StripeStoreEngine.StripeCompaction
extends CompactionContext

Represents one instance of stripe compaction, with the necessary context and flow.

Field Summary

Fields

Modifier and Type	Field and Description
private StripeCompactionPolicy.StripeCompactionRequest	stripeRequest

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

request

Constructor Summary

Constructors

Modifier	Constructor and Description
private	StripeCompaction()

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

Field Detail

stripeRequest

private StripeCompactionPolicy.StripeCompactionRequest stripeRequest

Constructor Detail

StripeCompaction

private StripeCompaction()

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