org.apache.cassandra.db.compaction
Class CompactionTask

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

Direct Known Subclasses:

LeveledCompactionTask

public class CompactionTask
extends AbstractCompactionTask

Field Summary

protected java.lang.String	compactionFileLocation
protected int	gcBefore
protected boolean	isUserDefined
protected static org.slf4j.Logger	logger
protected static long	totalBytesCompacted

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

cfs, sstables

Constructor Summary

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

Method Summary

static long	addToTotalBytesCompacted(long bytesCompacted)
CompactionTask	compactionFileLocation(java.lang.String compactionFileLocation)
int	execute(CompactionManager.CompactionExecutorStatsCollector collector) For internal use and testing only.
static long	getMaxDataAge(java.util.Collection<SSTableReader> sstables)
protected boolean	isCompactionInteresting(java.util.Set<SSTableReader> toCompact)
CompactionTask	isUserDefined(boolean isUserDefined)
protected boolean	newSSTableSegmentThresholdReached(SSTableWriter writer, long position)
protected boolean	partialCompactionsAcceptable()

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

cancel, getColumnFamilyStore, getSSTables, markSSTablesForCompaction, markSSTablesForCompaction, unmarkSSTables

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

compactionFileLocation

protected java.lang.String compactionFileLocation

gcBefore

protected final int gcBefore

isUserDefined

protected boolean isUserDefined

totalBytesCompacted

protected static long totalBytesCompacted

Constructor Detail

CompactionTask

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

Method Detail

addToTotalBytesCompacted

public static long addToTotalBytesCompacted(long bytesCompacted)

execute

public int execute(CompactionManager.CompactionExecutorStatsCollector collector)
            throws java.io.IOException

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.

Specified by:

execute in class AbstractCompactionTask

Throws:

java.io.IOException

partialCompactionsAcceptable

protected boolean partialCompactionsAcceptable()

newSSTableSegmentThresholdReached

protected boolean newSSTableSegmentThresholdReached(SSTableWriter writer,
                                                    long position)

isCompactionInteresting

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

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.

getMaxDataAge

public static long getMaxDataAge(java.util.Collection<SSTableReader> sstables)

compactionFileLocation

public CompactionTask compactionFileLocation(java.lang.String compactionFileLocation)

isUserDefined

public CompactionTask isUserDefined(boolean isUserDefined)