org.apache.cassandra.db
Class ColumnFamilyStore

java.lang.Object
  org.apache.cassandra.db.ColumnFamilyStore

All Implemented Interfaces:

ColumnFamilyStoreMBean

public class ColumnFamilyStore
extends java.lang.Object
implements ColumnFamilyStoreMBean

Nested Class Summary

static class	ColumnFamilyStore.CacheType
static class	ColumnFamilyStore.ViewFragment

Field Summary

java.lang.String	columnFamily
java.util.concurrent.locks.Lock	flushLock Lock to allow migrations to block all flushing, so we can be sure not to write orphaned data files
SecondaryIndexManager	indexManager
java.util.concurrent.ConcurrentMap<java.nio.ByteBuffer,java.nio.ByteBuffer>	internedNames
AutoSavingCache<Pair<Descriptor,DecoratedKey>,java.lang.Long>	keyCache
CFMetaData	metadata
IPartitioner	partitioner
static java.util.concurrent.ExecutorService	postFlushExecutor
AutoSavingCache<DecoratedKey,ColumnFamily>	rowCache
Table	table

Method Summary

void	addSSTable(SSTableReader sstable)
static java.lang.Iterable<ColumnFamilyStore>	all()
java.lang.Iterable<DecoratedKey>	allKeySamples()
void	apply(DecoratedKey key, ColumnFamily columnFamily) Insert/Update the column family for this key.
java.lang.Iterable<ColumnFamilyStore>	concatWithIndexes()
static ColumnFamilyStore	createColumnFamilyStore(Table table, java.lang.String columnFamily)
static ColumnFamilyStore	createColumnFamilyStore(Table table, java.lang.String columnFamily, IPartitioner partitioner, CFMetaData metadata)
SSTableWriter	createCompactionWriter(long estimatedRows, java.lang.String location, java.util.Collection<SSTableReader> sstables)
SSTableWriter	createFlushWriter(long estimatedRows, long estimatedSize, ReplayPosition context)
void	disableAutoCompaction() Disable automatic compaction.
long	estimateKeys()
void	forceBlockingFlush()
void	forceCleanup(NodeId.OneShotRenewer renewer)
java.util.concurrent.Future<?>	forceFlush() Triggers an immediate memtable flush.
void	forceMajorCompaction() force a major compaction of this column family
int	gcBefore()
long	getBloomFilterFalsePositives()
double	getBloomFilterFalseRatio()
java.util.List<java.lang.String>	getBuiltIndexes() Returns a list of the names of the built column indexes for current store
ColumnFamily	getColumnFamily(DecoratedKey key, QueryPath path, java.nio.ByteBuffer start, java.nio.ByteBuffer finish, boolean reversed, int limit)
ColumnFamily	getColumnFamily(QueryFilter filter) get a list of columns starting from a given column, in a specified order.
ColumnFamily	getColumnFamily(QueryFilter filter, ISortedColumns.Factory factory)
java.lang.String	getColumnFamilyName()
AbstractCompactionStrategy	getCompactionStrategy()
AbstractType	getComparator()
DataTracker	getDataTracker() Package protected for access from the CompactionManager.
long[]	getEstimatedColumnCountHistogram()
long[]	getEstimatedRowSizeHistogram()
long	getExpectedCompactedFileSize(java.lang.Iterable<SSTableReader> sstables)
java.lang.String	getFlushPath(long estimatedSize, java.lang.String version)
AutoSavingCache<Pair<Descriptor,DecoratedKey>,java.lang.Long>	getKeyCache()
int	getKeyCacheCapacity()
int	getKeyCacheSavePeriodInSeconds()
int	getKeyCacheSize()
long[]	getLifetimeReadLatencyHistogramMicros()
long[]	getLifetimeWriteLatencyHistogramMicros()
long	getLiveDiskSpaceUsed()
int	getLiveSSTableCount()
int	getMaximumCompactionThreshold() Gets the maximum number of sstables in queue before compaction kicks off
long	getMaxRowSize() return the size of the largest compacted row
SSTableReader	getMaxSizeFile(java.lang.Iterable<SSTableReader> sstables)
int	getMeanColumns()
long	getMeanRowSize() return the mean size of the rows compacted
long	getMemtableColumnsCount() Returns the total number of columns present in the memtable.
long	getMemtableDataSize() Returns the total amount of data stored in the memtable, including column related overhead.
java.util.Set<Memtable>	getMemtablesPendingFlush()
int	getMemtableSwitchCount() Returns the number of times that a flush has resulted in the memtable being switched out.
int	getMinimumCompactionThreshold() Gets the minimum number of sstables in queue before compaction kicks off
long	getMinRowSize() return the size of the smallest compacted row
int	getPendingTasks()
java.util.List<Row>	getRangeSlice(java.nio.ByteBuffer superColumn, AbstractBounds range, int maxResults, IFilter columnFilter) Fetch a range of rows and columns from memtables/sstables.
ColumnFamily	getRawCachedRow(DecoratedKey key) raw cached row -- does not fetch the row if it is not present.
long	getReadCount()
long	getRecentBloomFilterFalsePositives()
double	getRecentBloomFilterFalseRatio()
long[]	getRecentReadLatencyHistogramMicros()
double	getRecentReadLatencyMicros()
long[]	getRecentSSTablesPerReadHistogram()
long[]	getRecentWriteLatencyHistogramMicros()
double	getRecentWriteLatencyMicros()
int	getRowCacheCapacity()
int	getRowCacheKeysToSave()
int	getRowCacheSavePeriodInSeconds()
int	getRowCacheSize()
java.util.Collection<SSTableReader>	getSSTables()
long[]	getSSTablesPerReadHistogram()
java.lang.String	getTempSSTablePath(java.lang.String directory)
java.lang.String	getTempSSTablePath(java.lang.String directory, java.lang.String version)
long	getTotalDiskSpaceUsed()
long	getTotalMemtableLiveSize()
long	getTotalReadLatencyMicros()
long	getTotalWriteLatencyMicros()
int	getUnleveledSSTables()
long	getWriteCount()
boolean	hasUnreclaimedSpace()
void	initCaches()
java.nio.ByteBuffer	internOrCopy(java.nio.ByteBuffer name, Allocator allocator)
void	invalidateCachedRow(DecoratedKey key)
void	invalidateKeyCache() invalidate the key cache; for use after invalidating row cache
void	invalidateRowCache() invalidate the row cache; for use after bulk loading via BinaryMemtable
boolean	isCompactionDisabled()
boolean	isDropped()
boolean	isIndex() true if this CFS contains secondary index data
boolean	isInvalid()
boolean	isKeyInRemainingSSTables(DecoratedKey key, java.util.Set<? extends SSTable> sstablesToIgnore) Uses bloom filters to check if key may be present in any sstable in this ColumnFamilyStore, minus a set of provided ones.
java.lang.Iterable<DecoratedKey>	keySamples(Range range)
void	loadNewSSTables() #Scan through Keyspace/ColumnFamily's data directory determine which SSTables should be loaded and load them
static void	loadNewSSTables(java.lang.String ksName, java.lang.String cfName) See #StorageService.loadNewSSTables(String, String) for more info
void	markCompacted(java.util.Collection<SSTableReader> sstables)
java.util.Collection<SSTableReader>	markCurrentSSTablesReferenced() Get the current sstables, acquiring references on all of them.
ColumnFamilyStore.ViewFragment	markReferenced(DecoratedKey key)
ColumnFamilyStore.ViewFragment	markReferenced(DecoratedKey startWith, DecoratedKey stopAt)
java.nio.ByteBuffer	maybeIntern(java.nio.ByteBuffer name)
java.util.concurrent.Future<?>	maybeSwitchMemtable(Memtable oldMemtable, boolean writeCommitLog) flush the given memtable and swap in a new one for its CFS, if it hasn't been frozen already.
void	reduceCacheSizes() sets each cache's maximum capacity to 75% of its current size
void	reload()
void	removeAllSSTables()
static ColumnFamily	removeDeleted(ColumnFamily cf, int gcBefore)
static ColumnFamily	removeDeletedCF(ColumnFamily cf, int gcBefore)
static void	removeDeletedColumnsOnly(ColumnFamily cf, int gcBefore)
void	renameSSTables(java.lang.String newCfName)
void	replaceCompactedSSTables(java.util.Collection<SSTableReader> sstables, java.lang.Iterable<SSTableReader> replacements)
void	scheduleCacheSaving(int rowCacheSavePeriodInSeconds, int keyCacheSavePeriodInSeconds, int rowCacheKeysToSave)
void	scrub()
static void	scrubDataDirectories(java.lang.String table, java.lang.String columnFamily) Removes unnecessary files from the cf directory at startup: these include temp files, orphans, zero-length files and compacted sstables.
java.util.List<Row>	search(org.apache.cassandra.thrift.IndexClause clause, AbstractBounds range, IFilter dataFilter)
void	setKeyCacheSavePeriodInSeconds(int kcspis)
void	setMaximumCompactionThreshold(int maxCompactionThreshold) Sets the maximum number of sstables in queue before compaction kicks off
void	setMinimumCompactionThreshold(int minCompactionThreshold) Sets the minimum number of sstables in queue before compaction kicks off
void	setRowCacheKeysToSave(int keysToSave)
void	setRowCacheSavePeriodInSeconds(int rcspis)
void	snapshot(java.lang.String snapshotName) Take a snap shot of this columnfamily store.
java.lang.String	toString()
java.util.concurrent.Future<?>	truncate() Truncate practically deletes the entire column family's data
void	unregisterMBean()
void	updateCacheSizes() Resizes the key and row caches based on the current key estimate.
void	updateRowCache(DecoratedKey key, ColumnFamily columnFamily)

Methods inherited from class java.lang.Object

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

Field Detail

postFlushExecutor

public static final java.util.concurrent.ExecutorService postFlushExecutor

table

public final Table table

columnFamily

public final java.lang.String columnFamily

metadata

public final CFMetaData metadata

partitioner

public final IPartitioner partitioner

indexManager

public final SecondaryIndexManager indexManager

internedNames

public final java.util.concurrent.ConcurrentMap<java.nio.ByteBuffer,java.nio.ByteBuffer> internedNames

flushLock

public final java.util.concurrent.locks.Lock flushLock

Lock to allow migrations to block all flushing, so we can be sure not to write orphaned data files

keyCache

public final AutoSavingCache<Pair<Descriptor,DecoratedKey>,java.lang.Long> keyCache

rowCache

public final AutoSavingCache<DecoratedKey,ColumnFamily> rowCache

Method Detail

reload

public void reload()
            throws java.io.IOException

Throws:

java.io.IOException

unregisterMBean

public void unregisterMBean()

getMinRowSize

public long getMinRowSize()

Description copied from interface: ColumnFamilyStoreMBean

return the size of the smallest compacted row

Specified by:

getMinRowSize in interface ColumnFamilyStoreMBean

Returns:

getMaxRowSize

public long getMaxRowSize()

Description copied from interface: ColumnFamilyStoreMBean

return the size of the largest compacted row

Specified by:

getMaxRowSize in interface ColumnFamilyStoreMBean

Returns:

getMeanRowSize

public long getMeanRowSize()

Description copied from interface: ColumnFamilyStoreMBean

return the mean size of the rows compacted

Specified by:

getMeanRowSize in interface ColumnFamilyStoreMBean

Returns:

getMeanColumns

public int getMeanColumns()

createColumnFamilyStore

public static ColumnFamilyStore createColumnFamilyStore(Table table,
                                                        java.lang.String columnFamily)

createColumnFamilyStore

public static ColumnFamilyStore createColumnFamilyStore(Table table,
                                                        java.lang.String columnFamily,
                                                        IPartitioner partitioner,
                                                        CFMetaData metadata)

scrubDataDirectories

public static void scrubDataDirectories(java.lang.String table,
                                        java.lang.String columnFamily)

Removes unnecessary files from the cf directory at startup: these include temp files, orphans, zero-length files and compacted sstables. Files that cannot be recognized will be ignored.

initCaches

public void initCaches()

scheduleCacheSaving

public void scheduleCacheSaving(int rowCacheSavePeriodInSeconds,
                                int keyCacheSavePeriodInSeconds,
                                int rowCacheKeysToSave)

getKeyCache

public AutoSavingCache<Pair<Descriptor,DecoratedKey>,java.lang.Long> getKeyCache()

loadNewSSTables

public static void loadNewSSTables(java.lang.String ksName,
                                   java.lang.String cfName)

See #StorageService.loadNewSSTables(String, String) for more info

Parameters:

ksName - The keyspace name

cfName - The columnFamily name

loadNewSSTables

public void loadNewSSTables()

#Scan through Keyspace/ColumnFamily's data directory determine which SSTables should be loaded and load them

Specified by:

loadNewSSTables in interface ColumnFamilyStoreMBean

getColumnFamilyName

public java.lang.String getColumnFamilyName()

Specified by:

getColumnFamilyName in interface ColumnFamilyStoreMBean

Returns:

the name of the column family

getFlushPath

public java.lang.String getFlushPath(long estimatedSize,
                                     java.lang.String version)

getTempSSTablePath

public java.lang.String getTempSSTablePath(java.lang.String directory,
                                           java.lang.String version)

getTempSSTablePath

public java.lang.String getTempSSTablePath(java.lang.String directory)

maybeSwitchMemtable

public java.util.concurrent.Future<?> maybeSwitchMemtable(Memtable oldMemtable,
                                                          boolean writeCommitLog)

flush the given memtable and swap in a new one for its CFS, if it hasn't been frozen already. threadsafe.

isDropped

public boolean isDropped()

forceFlush

public java.util.concurrent.Future<?> forceFlush()

Description copied from interface: ColumnFamilyStoreMBean

Triggers an immediate memtable flush.

Specified by:

forceFlush in interface ColumnFamilyStoreMBean

forceBlockingFlush

public void forceBlockingFlush()
                        throws java.util.concurrent.ExecutionException,
                               java.lang.InterruptedException

Throws:

java.util.concurrent.ExecutionException

java.lang.InterruptedException

updateRowCache

public void updateRowCache(DecoratedKey key,
                           ColumnFamily columnFamily)

apply

public void apply(DecoratedKey key,
                  ColumnFamily columnFamily)

Insert/Update the column family for this key. Caller is responsible for acquiring Table.flusherLock! param @ lock - lock that needs to be used. param @ key - key for update/insert param @ columnFamily - columnFamily changes

removeDeletedCF

public static ColumnFamily removeDeletedCF(ColumnFamily cf,
                                           int gcBefore)

removeDeleted

public static ColumnFamily removeDeleted(ColumnFamily cf,
                                         int gcBefore)

removeDeletedColumnsOnly

public static void removeDeletedColumnsOnly(ColumnFamily cf,
                                            int gcBefore)

isKeyInRemainingSSTables

public boolean isKeyInRemainingSSTables(DecoratedKey key,
                                        java.util.Set<? extends SSTable> sstablesToIgnore)

Uses bloom filters to check if key may be present in any sstable in this ColumnFamilyStore, minus a set of provided ones. Because BFs are checked, negative returns ensure that the key is not present in the checked SSTables, but positive ones doesn't ensure key presence.

addSSTable

public void addSSTable(SSTableReader sstable)

getExpectedCompactedFileSize

public long getExpectedCompactedFileSize(java.lang.Iterable<SSTableReader> sstables)

getMaxSizeFile

public SSTableReader getMaxSizeFile(java.lang.Iterable<SSTableReader> sstables)

forceCleanup

public void forceCleanup(NodeId.OneShotRenewer renewer)
                  throws java.util.concurrent.ExecutionException,
                         java.lang.InterruptedException

Throws:

java.util.concurrent.ExecutionException

java.lang.InterruptedException

scrub

public void scrub()
           throws java.util.concurrent.ExecutionException,
                  java.lang.InterruptedException

Throws:

java.util.concurrent.ExecutionException

java.lang.InterruptedException

markCompacted

public void markCompacted(java.util.Collection<SSTableReader> sstables)

replaceCompactedSSTables

public void replaceCompactedSSTables(java.util.Collection<SSTableReader> sstables,
                                     java.lang.Iterable<SSTableReader> replacements)

isInvalid

public boolean isInvalid()

removeAllSSTables

public void removeAllSSTables()
                       throws java.io.IOException

Throws:

java.io.IOException

getMemtableColumnsCount

public long getMemtableColumnsCount()

Description copied from interface: ColumnFamilyStoreMBean

Returns the total number of columns present in the memtable.

Specified by:

getMemtableColumnsCount in interface ColumnFamilyStoreMBean

Returns:

The number of columns.

getMemtableDataSize

public long getMemtableDataSize()

Description copied from interface: ColumnFamilyStoreMBean

Returns the total amount of data stored in the memtable, including column related overhead.

Specified by:

getMemtableDataSize in interface ColumnFamilyStoreMBean

Returns:

The size in bytes.

getTotalMemtableLiveSize

public long getTotalMemtableLiveSize()

getMemtableSwitchCount

public int getMemtableSwitchCount()

Description copied from interface: ColumnFamilyStoreMBean

Returns the number of times that a flush has resulted in the memtable being switched out.

Specified by:

getMemtableSwitchCount in interface ColumnFamilyStoreMBean

Returns:

the number of memtable switches

getDataTracker

public DataTracker getDataTracker()

Package protected for access from the CompactionManager.

getSSTables

public java.util.Collection<SSTableReader> getSSTables()

getRecentSSTablesPerReadHistogram

public long[] getRecentSSTablesPerReadHistogram()

Specified by:

getRecentSSTablesPerReadHistogram in interface ColumnFamilyStoreMBean

Returns:

a histogram of the number of sstable data files accessed per read: reading this property resets it

getSSTablesPerReadHistogram

public long[] getSSTablesPerReadHistogram()

Specified by:

getSSTablesPerReadHistogram in interface ColumnFamilyStoreMBean

Returns:

a histogram of the number of sstable data files accessed per read

getReadCount

public long getReadCount()

Specified by:

getReadCount in interface ColumnFamilyStoreMBean

Returns:

the number of read operations on this column family

getRecentReadLatencyMicros

public double getRecentReadLatencyMicros()

Specified by:

getRecentReadLatencyMicros in interface ColumnFamilyStoreMBean

Returns:

average latency per read operation since the last call

getLifetimeReadLatencyHistogramMicros

public long[] getLifetimeReadLatencyHistogramMicros()

Specified by:

getLifetimeReadLatencyHistogramMicros in interface ColumnFamilyStoreMBean

Returns:

an array representing the latency histogram

getRecentReadLatencyHistogramMicros

public long[] getRecentReadLatencyHistogramMicros()

Specified by:

getRecentReadLatencyHistogramMicros in interface ColumnFamilyStoreMBean

Returns:

an array representing the latency histogram

getTotalReadLatencyMicros

public long getTotalReadLatencyMicros()

Specified by:

getTotalReadLatencyMicros in interface ColumnFamilyStoreMBean

Returns:

total read latency (divide by getReadCount() for average)

getPendingTasks

public int getPendingTasks()

Specified by:

getPendingTasks in interface ColumnFamilyStoreMBean

Returns:

the estimated number of tasks pending for this column family

getWriteCount

public long getWriteCount()

Specified by:

getWriteCount in interface ColumnFamilyStoreMBean

Returns:

the number of write operations on this column family

getTotalWriteLatencyMicros

public long getTotalWriteLatencyMicros()

Specified by:

getTotalWriteLatencyMicros in interface ColumnFamilyStoreMBean

Returns:

total write latency (divide by getReadCount() for average)

getRecentWriteLatencyMicros

public double getRecentWriteLatencyMicros()

Specified by:

getRecentWriteLatencyMicros in interface ColumnFamilyStoreMBean

Returns:

average latency per write operation since the last call

getLifetimeWriteLatencyHistogramMicros

public long[] getLifetimeWriteLatencyHistogramMicros()

Specified by:

getLifetimeWriteLatencyHistogramMicros in interface ColumnFamilyStoreMBean

Returns:

an array representing the latency histogram

getRecentWriteLatencyHistogramMicros

public long[] getRecentWriteLatencyHistogramMicros()

Specified by:

getRecentWriteLatencyHistogramMicros in interface ColumnFamilyStoreMBean

Returns:

an array representing the latency histogram

getColumnFamily

public ColumnFamily getColumnFamily(DecoratedKey key,
                                    QueryPath path,
                                    java.nio.ByteBuffer start,
                                    java.nio.ByteBuffer finish,
                                    boolean reversed,
                                    int limit)

getColumnFamily

public ColumnFamily getColumnFamily(QueryFilter filter)

get a list of columns starting from a given column, in a specified order. only the latest version of a column is returned.

Returns:

null if there is no data and no tombstones; otherwise a ColumnFamily

getColumnFamily

public ColumnFamily getColumnFamily(QueryFilter filter,
                                    ISortedColumns.Factory factory)

gcBefore

public int gcBefore()

markCurrentSSTablesReferenced

public java.util.Collection<SSTableReader> markCurrentSSTablesReferenced()

Get the current sstables, acquiring references on all of them. The caller is in charge of releasing the references on the sstables. See markCurrentViewReferenced() above.

markReferenced

public ColumnFamilyStore.ViewFragment markReferenced(DecoratedKey key)

Returns:

a ViewFragment containing the sstables and memtables that may need to be merged for the given @param key, according to the interval tree

markReferenced

public ColumnFamilyStore.ViewFragment markReferenced(DecoratedKey startWith,
                                                     DecoratedKey stopAt)

Returns:

a ViewFragment containing the sstables and memtables that may need to be merged for rows between @param startWith and @param stopAt, inclusive, according to the interval tree

getRangeSlice

public java.util.List<Row> getRangeSlice(java.nio.ByteBuffer superColumn,
                                         AbstractBounds range,
                                         int maxResults,
                                         IFilter columnFilter)
                                  throws java.util.concurrent.ExecutionException,
                                         java.lang.InterruptedException

Fetch a range of rows and columns from memtables/sstables.

Parameters:

superColumn - optional SuperColumn to slice subcolumns of; null to slice top-level columns

range - Either a Bounds, which includes start key, or a Range, which does not.

maxResults - Maximum rows to return

columnFilter - description of the columns we're interested in for each row

Returns:

true if we found all keys we were looking for, otherwise false

Throws:

java.util.concurrent.ExecutionException

java.lang.InterruptedException

search

public java.util.List<Row> search(org.apache.cassandra.thrift.IndexClause clause,
                                  AbstractBounds range,
                                  IFilter dataFilter)

getComparator

public AbstractType getComparator()

snapshot

public void snapshot(java.lang.String snapshotName)

Take a snap shot of this columnfamily store.

Parameters:

snapshotName - the name of the associated with the snapshot

hasUnreclaimedSpace

public boolean hasUnreclaimedSpace()

getTotalDiskSpaceUsed

public long getTotalDiskSpaceUsed()

Specified by:

getTotalDiskSpaceUsed in interface ColumnFamilyStoreMBean

Returns:

total disk space used by SSTables belonging to this CF, including obsolete ones waiting to be GC'd

getLiveDiskSpaceUsed

public long getLiveDiskSpaceUsed()

Specified by:

getLiveDiskSpaceUsed in interface ColumnFamilyStoreMBean

Returns:

disk space used by SSTables belonging to this CF

getLiveSSTableCount

public int getLiveSSTableCount()

Specified by:

getLiveSSTableCount in interface ColumnFamilyStoreMBean

Returns:

the number of SSTables on disk for this CF

getRawCachedRow

public ColumnFamily getRawCachedRow(DecoratedKey key)

raw cached row -- does not fetch the row if it is not present. not counted in cache statistics.

invalidateCachedRow

public void invalidateCachedRow(DecoratedKey key)

forceMajorCompaction

public void forceMajorCompaction()
                          throws java.lang.InterruptedException,
                                 java.util.concurrent.ExecutionException

Description copied from interface: ColumnFamilyStoreMBean

force a major compaction of this column family

Specified by:

forceMajorCompaction in interface ColumnFamilyStoreMBean

Throws:

java.lang.InterruptedException

java.util.concurrent.ExecutionException

invalidateRowCache

public void invalidateRowCache()

Description copied from interface: ColumnFamilyStoreMBean

invalidate the row cache; for use after bulk loading via BinaryMemtable

Specified by:

invalidateRowCache in interface ColumnFamilyStoreMBean

invalidateKeyCache

public void invalidateKeyCache()

Description copied from interface: ColumnFamilyStoreMBean

invalidate the key cache; for use after invalidating row cache

Specified by:

invalidateKeyCache in interface ColumnFamilyStoreMBean

getRowCacheCapacity

public int getRowCacheCapacity()

getKeyCacheCapacity

public int getKeyCacheCapacity()

getRowCacheSize

public int getRowCacheSize()

getKeyCacheSize

public int getKeyCacheSize()

all

public static java.lang.Iterable<ColumnFamilyStore> all()

allKeySamples

public java.lang.Iterable<DecoratedKey> allKeySamples()

keySamples

public java.lang.Iterable<DecoratedKey> keySamples(Range range)

truncate

public java.util.concurrent.Future<?> truncate()
                                        throws java.io.IOException

Truncate practically deletes the entire column family's data

Returns:

a Future to the delete operation. Call the future's get() to make sure the column family has been deleted

Throws:

java.io.IOException

renameSSTables

public void renameSSTables(java.lang.String newCfName)
                    throws java.io.IOException

Throws:

java.io.IOException

getBloomFilterFalsePositives

public long getBloomFilterFalsePositives()

Specified by:

getBloomFilterFalsePositives in interface ColumnFamilyStoreMBean

getRecentBloomFilterFalsePositives

public long getRecentBloomFilterFalsePositives()

Specified by:

getRecentBloomFilterFalsePositives in interface ColumnFamilyStoreMBean

getBloomFilterFalseRatio

public double getBloomFilterFalseRatio()

Specified by:

getBloomFilterFalseRatio in interface ColumnFamilyStoreMBean

getRecentBloomFilterFalseRatio

public double getRecentBloomFilterFalseRatio()

Specified by:

getRecentBloomFilterFalseRatio in interface ColumnFamilyStoreMBean

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

disableAutoCompaction

public void disableAutoCompaction()

Description copied from interface: ColumnFamilyStoreMBean

Disable automatic compaction.

Specified by:

disableAutoCompaction in interface ColumnFamilyStoreMBean

getCompactionStrategy

public AbstractCompactionStrategy getCompactionStrategy()

getMinimumCompactionThreshold

public int getMinimumCompactionThreshold()

Description copied from interface: ColumnFamilyStoreMBean

Gets the minimum number of sstables in queue before compaction kicks off

Specified by:

getMinimumCompactionThreshold in interface ColumnFamilyStoreMBean

setMinimumCompactionThreshold

public void setMinimumCompactionThreshold(int minCompactionThreshold)

Description copied from interface: ColumnFamilyStoreMBean

Sets the minimum number of sstables in queue before compaction kicks off

Specified by:

setMinimumCompactionThreshold in interface ColumnFamilyStoreMBean

getMaximumCompactionThreshold

public int getMaximumCompactionThreshold()

Description copied from interface: ColumnFamilyStoreMBean

Gets the maximum number of sstables in queue before compaction kicks off

Specified by:

getMaximumCompactionThreshold in interface ColumnFamilyStoreMBean

setMaximumCompactionThreshold

public void setMaximumCompactionThreshold(int maxCompactionThreshold)

Description copied from interface: ColumnFamilyStoreMBean

Sets the maximum number of sstables in queue before compaction kicks off

Specified by:

setMaximumCompactionThreshold in interface ColumnFamilyStoreMBean

isCompactionDisabled

public boolean isCompactionDisabled()

getRowCacheSavePeriodInSeconds

public int getRowCacheSavePeriodInSeconds()

Specified by:

getRowCacheSavePeriodInSeconds in interface ColumnFamilyStoreMBean

setRowCacheSavePeriodInSeconds

public void setRowCacheSavePeriodInSeconds(int rcspis)

Specified by:

setRowCacheSavePeriodInSeconds in interface ColumnFamilyStoreMBean

getKeyCacheSavePeriodInSeconds

public int getKeyCacheSavePeriodInSeconds()

Specified by:

getKeyCacheSavePeriodInSeconds in interface ColumnFamilyStoreMBean

setKeyCacheSavePeriodInSeconds

public void setKeyCacheSavePeriodInSeconds(int kcspis)

Specified by:

setKeyCacheSavePeriodInSeconds in interface ColumnFamilyStoreMBean

getRowCacheKeysToSave

public int getRowCacheKeysToSave()

Specified by:

getRowCacheKeysToSave in interface ColumnFamilyStoreMBean

setRowCacheKeysToSave

public void setRowCacheKeysToSave(int keysToSave)

Specified by:

setRowCacheKeysToSave in interface ColumnFamilyStoreMBean

estimateKeys

public long estimateKeys()

Specified by:

estimateKeys in interface ColumnFamilyStoreMBean

updateCacheSizes

public void updateCacheSizes()

Resizes the key and row caches based on the current key estimate.

getEstimatedRowSizeHistogram

public long[] getEstimatedRowSizeHistogram()

Specified by:

getEstimatedRowSizeHistogram in interface ColumnFamilyStoreMBean

getEstimatedColumnCountHistogram

public long[] getEstimatedColumnCountHistogram()

Specified by:

getEstimatedColumnCountHistogram in interface ColumnFamilyStoreMBean

isIndex

public boolean isIndex()

true if this CFS contains secondary index data

reduceCacheSizes

public void reduceCacheSizes()

sets each cache's maximum capacity to 75% of its current size

internOrCopy

public java.nio.ByteBuffer internOrCopy(java.nio.ByteBuffer name,
                                        Allocator allocator)

maybeIntern

public java.nio.ByteBuffer maybeIntern(java.nio.ByteBuffer name)

createFlushWriter

public SSTableWriter createFlushWriter(long estimatedRows,
                                       long estimatedSize,
                                       ReplayPosition context)
                                throws java.io.IOException

Throws:

java.io.IOException

createCompactionWriter

public SSTableWriter createCompactionWriter(long estimatedRows,
                                            java.lang.String location,
                                            java.util.Collection<SSTableReader> sstables)
                                     throws java.io.IOException

Throws:

java.io.IOException

concatWithIndexes

public java.lang.Iterable<ColumnFamilyStore> concatWithIndexes()

getMemtablesPendingFlush

public java.util.Set<Memtable> getMemtablesPendingFlush()

getBuiltIndexes

public java.util.List<java.lang.String> getBuiltIndexes()

Description copied from interface: ColumnFamilyStoreMBean

Returns a list of the names of the built column indexes for current store

Specified by:

getBuiltIndexes in interface ColumnFamilyStoreMBean

Returns:

list of the index names

getUnleveledSSTables

public int getUnleveledSSTables()

Specified by:

getUnleveledSSTables in interface ColumnFamilyStoreMBean

Returns:

the number of SSTables in L0. Always return 0 if Leveled compaction is not enabled.