org.apache.cassandra.db.compaction
Class CompactionTask

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

All Implemented Interfaces:

java.lang.Runnable

Direct Known Subclasses:

LeveledCompactionTask

public class CompactionTask
extends AbstractCompactionTask

Field Summary

protected int	gcBefore
protected static org.slf4j.Logger	logger
protected static long	totalBytesCompacted

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

cfs, compactionType, isUserDefined, sstables

Constructor Summary

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

Method Summary

static long	addToTotalBytesCompacted(long bytesCompacted)
int	execute(CompactionManager.CompactionExecutorStatsCollector collector) For internal use and testing only.
long	getExpectedWriteSize() Get expected write size to determine which disk to use for this task.
static long	getMaxDataAge(java.util.Collection<SSTableReader> sstables)
protected boolean	newSSTableSegmentThresholdReached(SSTableWriter writer)
protected boolean	partialCompactionsAcceptable()
boolean	reduceScopeForLimitedSpace() Called if no disk is available with free space for the full write size.
protected void	runWith(java.io.File dataDirectory) For internal use and testing only.

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

setCompactionType, setUserDefined, 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

Field Detail

logger

protected static final org.slf4j.Logger logger

gcBefore

protected final int gcBefore

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)

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

getExpectedWriteSize

public long getExpectedWriteSize()

Description copied from class: DiskAwareRunnable

Get expected write size to determine which disk to use for this task.

Specified by:

getExpectedWriteSize in class DiskAwareRunnable

Returns:

expected size in bytes this task will write to disk.

reduceScopeForLimitedSpace

public boolean reduceScopeForLimitedSpace()

Description copied from class: DiskAwareRunnable

Called if no disk is available with free space for the full write size.

Overrides:

reduceScopeForLimitedSpace in class DiskAwareRunnable

Returns:

true if the scope of the task was successfully reduced.

runWith

protected void runWith(java.io.File dataDirectory)
                throws java.lang.Exception

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:

runWith in class DiskAwareRunnable

Parameters:

dataDirectory - data directory to work on

Throws:

java.lang.Exception

partialCompactionsAcceptable

protected boolean partialCompactionsAcceptable()

newSSTableSegmentThresholdReached

protected boolean newSSTableSegmentThresholdReached(SSTableWriter writer)

getMaxDataAge

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