Package org.apache.cassandra.db.compaction.writers

Class SplittingSizeTieredCompactionWriter

java.lang.Object

org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

org.apache.cassandra.db.compaction.writers.CompactionAwareWriter

org.apache.cassandra.db.compaction.writers.SplittingSizeTieredCompactionWriter

All Implemented Interfaces:

AutoCloseable, Transactional

public class SplittingSizeTieredCompactionWriter
extends CompactionAwareWriter

CompactionAwareWriter that splits input in differently sized sstables Biggest sstable will be total_compaction_size / 2, second biggest total_compaction_size / 4 etc until the result would be sub 50MiB, all those are put in the same

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

Transactional.AbstractTransactional.State

Nested classes/interfaces inherited from interface org.apache.cassandra.utils.concurrent.Transactional

Transactional.AbstractTransactional

Field Summary

Fields

Modifier and Type	Field	Description
static final long	DEFAULT_SMALLEST_SSTABLE_BYTES

Fields inherited from class org.apache.cassandra.db.compaction.writers.CompactionAwareWriter

cfs, currentDirectory, directories, estimatedTotalKeys, isTransient, maxAge, minRepairedAt, nonExpiredSSTables, pendingRepair, sstableWriter, txn

Constructor Summary

Constructors

Constructor	Description
SplittingSizeTieredCompactionWriter(ColumnFamilyStore cfs, Directories directories, LifecycleTransaction txn, Set<SSTableReader> nonExpiredSSTables)
SplittingSizeTieredCompactionWriter(ColumnFamilyStore cfs, Directories directories, LifecycleTransaction txn, Set<SSTableReader> nonExpiredSSTables, long smallestSSTable)

Method Summary

Modifier and Type	Method	Description
protected long	getExpectedWriteSize()
protected boolean	shouldSwitchWriterInCurrentLocation(DecoratedKey key)	Returns true if the writer should be switched for reasons other than switching to a new data directory (e.g.
protected long	sstableKeyCount()	Returns the key count with which created sstables should be set up.
protected int	sstableLevel()	Returns the level that should be used when creating sstables.

Methods inherited from class org.apache.cassandra.db.compaction.writers.CompactionAwareWriter

append, doAbort, doCommit, doPostCleanup, doPrepare, estimatedKeys, finish, getDirectories, getSStableDirectory, getWriteDirectory, maybeSwitchLocation, maybeSwitchWriter, newWriterBuilder, realAppend, setRepairedAt, sstableWriter, switchCompactionWriter

Methods inherited from class org.apache.cassandra.utils.concurrent.Transactional.AbstractTransactional

abort, abort, close, commit, commit, doPreCleanup, prepareToCommit, state

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cassandra.utils.concurrent.Transactional

abort, close, commit, prepareToCommit

Field Details

DEFAULT_SMALLEST_SSTABLE_BYTES

public static final long DEFAULT_SMALLEST_SSTABLE_BYTES

See Also:

• Constant Field Values

Constructor Details

SplittingSizeTieredCompactionWriter

public SplittingSizeTieredCompactionWriter(ColumnFamilyStore cfs,
 Directories directories,
 LifecycleTransaction txn,
 Set<SSTableReader> nonExpiredSSTables)

SplittingSizeTieredCompactionWriter

public SplittingSizeTieredCompactionWriter(ColumnFamilyStore cfs,
 Directories directories,
 LifecycleTransaction txn,
 Set<SSTableReader> nonExpiredSSTables,
 long smallestSSTable)

Method Details

shouldSwitchWriterInCurrentLocation

protected boolean shouldSwitchWriterInCurrentLocation(DecoratedKey key)

Description copied from class: CompactionAwareWriter

Returns true if the writer should be switched for reasons other than switching to a new data directory (e.g. because an sstable size limit has been reached).

Specified by:

shouldSwitchWriterInCurrentLocation in class CompactionAwareWriter

sstableLevel

protected int sstableLevel()

Description copied from class: CompactionAwareWriter

Returns the level that should be used when creating sstables.

Overrides:

sstableLevel in class CompactionAwareWriter

sstableKeyCount

protected long sstableKeyCount()

Description copied from class: CompactionAwareWriter

Returns the key count with which created sstables should be set up.

Specified by:

sstableKeyCount in class CompactionAwareWriter

getExpectedWriteSize

protected long getExpectedWriteSize()

Overrides:

getExpectedWriteSize in class CompactionAwareWriter