org.apache.cassandra.db.compaction
Class LeveledCompactionTask

java.lang.Object
  org.apache.cassandra.db.compaction.AbstractCompactionTask
      org.apache.cassandra.db.compaction.CompactionTask
          org.apache.cassandra.db.compaction.LeveledCompactionTask

public class LeveledCompactionTask
extends CompactionTask

Field Summary

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

compactionFileLocation, gcBefore, isUserDefined, logger, totalBytesCompacted

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

cfs, 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()
protected boolean	newSSTableSegmentThresholdReached(SSTableWriter writer, long position)
protected boolean	partialCompactionsAcceptable()

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

addToTotalBytesCompacted, compactionFileLocation, getMaxDataAge, isUserDefined

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

getColumnFamilyStore, getSSTables, markSSTablesForCompaction, markSSTablesForCompaction, unmarkSSTables

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, 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)
            throws java.io.IOException

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

Throws:

java.io.IOException

isDone

public boolean isDone()

newSSTableSegmentThresholdReached

protected boolean newSSTableSegmentThresholdReached(SSTableWriter writer,
                                                    long position)

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