org.apache.cassandra.db.compaction
Class LeveledCompactionTask

java.lang.Object
  org.apache.cassandra.utils.WrappedRunnable
      org.apache.cassandra.io.util.DiskAwareRunnable
          org.apache.cassandra.db.compaction.AbstractCompactionTask
              org.apache.cassandra.db.compaction.CompactionTask
                  org.apache.cassandra.db.compaction.LeveledCompactionTask

All Implemented Interfaces:

java.lang.Runnable

public class LeveledCompactionTask
extends CompactionTask

Field Summary

Fields inherited from class org.apache.cassandra.db.compaction.CompactionTask

gcBefore, logger, totalBytesCompacted

Fields inherited from class org.apache.cassandra.db.compaction.AbstractCompactionTask

cfs, compactionType, isUserDefined, sstables

Constructor Summary

LeveledCompactionTask(ColumnFamilyStore cfs, java.util.Collection<SSTableReader> sstables, int gcBefore, int sstableSizeInMB)

Method Summary

protected void	cancel()
int	execute(CompactionManager.CompactionExecutorStatsCollector collector) For internal use and testing only.
protected boolean	isCompactionInteresting(java.util.Set<SSTableReader> toCompact)
boolean	isDone()
boolean	markSSTablesForCompaction(int min, int max)
protected boolean	newSSTableSegmentThresholdReached(SSTableWriter writer)
protected boolean	partialCompactionsAcceptable()

Methods inherited from class org.apache.cassandra.db.compaction.CompactionTask

addToTotalBytesCompacted, getExpectedWriteSize, getMaxDataAge, reduceScopeForLimitedSpace, runWith

Methods inherited from class org.apache.cassandra.db.compaction.AbstractCompactionTask

getColumnFamilyStore, getSSTables, isUserDefined, markSSTablesForCompaction, setCompactionType, toString, unmarkSSTables

Methods inherited from class org.apache.cassandra.io.util.DiskAwareRunnable

runMayThrow

Methods inherited from class org.apache.cassandra.utils.WrappedRunnable

run

Methods inherited from class java.lang.Object

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

Constructor Detail

LeveledCompactionTask

public LeveledCompactionTask(ColumnFamilyStore cfs,
                             java.util.Collection<SSTableReader> sstables,
                             int gcBefore,
                             int sstableSizeInMB)

Method Detail

execute

public int execute(CompactionManager.CompactionExecutorStatsCollector collector)

Description copied from class: CompactionTask

For internal use and testing only. The rest of the system should go through the submit* methods, which are properly serialized. Caller is in charge of marking/unmarking the sstables as compacting.

Overrides:

execute in class CompactionTask

isDone

public boolean isDone()

markSSTablesForCompaction

public boolean markSSTablesForCompaction(int min,
                                         int max)

Overrides:

markSSTablesForCompaction in class AbstractCompactionTask

newSSTableSegmentThresholdReached

protected boolean newSSTableSegmentThresholdReached(SSTableWriter writer)

Overrides:

newSSTableSegmentThresholdReached in class CompactionTask

isCompactionInteresting

protected boolean isCompactionInteresting(java.util.Set<SSTableReader> toCompact)

Overrides:

isCompactionInteresting in class CompactionTask

Returns:

true if the proposed compaction is worth proceeding with. We allow leveled compaction to override this to allow "promoting" sstables from one level to another w/o rewriting them, if there is no overlapping.

partialCompactionsAcceptable

protected boolean partialCompactionsAcceptable()

Overrides:

partialCompactionsAcceptable in class CompactionTask

cancel

protected void cancel()

Overrides:

cancel in class AbstractCompactionTask