org.apache.cassandra.db

Interface ColumnFamilyStoreMBean

All Known Implementing Classes:

ColumnFamilyStore

public interface ColumnFamilyStoreMBean

The MBean interface for ColumnFamilyStore

Method Summary

Modifier and Type	Method and Description
void	beginLocalSampling(java.lang.String sampler, int capacity) begin sampling for a specific sampler with a given capacity.
void	compactionDiskSpaceCheck(boolean enable)
long	estimateKeys()
javax.management.openmbean.CompositeData	finishLocalSampling(java.lang.String sampler, int count)
void	forceMajorCompaction(boolean splitOutput) force a major compaction of this column family
java.util.List<java.lang.String>	getBuiltIndexes() Returns a list of the names of the built column indexes for current store
java.lang.String	getColumnFamilyName() Deprecated.
java.util.Map<java.lang.String,java.lang.String>	getCompactionParameters()
java.lang.String	getCompactionParametersJson()
java.util.Map<java.lang.String,java.lang.String>	getCompressionParameters() Get the compression parameters
double	getDroppableTombstoneRatio() Get the ratio of droppable tombstones to real columns (and non-droppable tombstones)
int	getMaximumCompactionThreshold() Gets the maximum number of sstables in queue before compaction kicks off
int	getMinimumCompactionThreshold() Gets the minimum number of sstables in queue before compaction kicks off
int[]	getSSTableCountPerLevel()
java.util.List<java.lang.String>	getSSTablesForKey(java.lang.String key) Returns a list of filenames that contain the given key on this node
java.lang.String	getTableName()
int	getUnleveledSSTables()
boolean	isAutoCompactionDisabled()
boolean	isCompactionDiskSpaceCheckEnabled()
void	loadNewSSTables() Scan through Keyspace/ColumnFamily's data directory determine which SSTables should be loaded and load them
void	setCompactionParameters(java.util.Map<java.lang.String,java.lang.String> options) Sets the compaction parameters locally for this node Note that this will be set until an ALTER with compaction = {..} is executed or the node is restarted
void	setCompactionParametersJson(java.lang.String options) Sets the compaction parameters locally for this node Note that this will be set until an ALTER with compaction = {..} is executed or the node is restarted
void	setCompactionThresholds(int minThreshold, int maxThreshold) Sets the maximum and maximum number of SSTables in queue before compaction kicks off
void	setCompressionParameters(java.util.Map<java.lang.String,java.lang.String> opts) Set the compression parameters
void	setCrcCheckChance(double crcCheckChance) Set new crc check chance
void	setMaximumCompactionThreshold(int threshold) Sets the maximum number of sstables in queue before compaction kicks off
void	setMinimumCompactionThreshold(int threshold) Sets the minimum number of sstables in queue before compaction kicks off
long	trueSnapshotsSize()

Method Detail

getColumnFamilyName

@Deprecated
java.lang.String getColumnFamilyName()

Deprecated.

Returns:

the name of the column family

getTableName

java.lang.String getTableName()

forceMajorCompaction

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

force a major compaction of this column family

Parameters:

splitOutput - true if the output of the major compaction should be split in several sstables

Throws:

java.util.concurrent.ExecutionException

java.lang.InterruptedException

getMinimumCompactionThreshold

int getMinimumCompactionThreshold()

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

setMinimumCompactionThreshold

void setMinimumCompactionThreshold(int threshold)

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

getMaximumCompactionThreshold

int getMaximumCompactionThreshold()

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

setCompactionThresholds

void setCompactionThresholds(int minThreshold,
                             int maxThreshold)

Sets the maximum and maximum number of SSTables in queue before compaction kicks off

setMaximumCompactionThreshold

void setMaximumCompactionThreshold(int threshold)

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

setCompactionParametersJson

void setCompactionParametersJson(java.lang.String options)

Sets the compaction parameters locally for this node Note that this will be set until an ALTER with compaction = {..} is executed or the node is restarted

Parameters:

options - compaction options with the same syntax as when doing ALTER ... WITH compaction = {..}

getCompactionParametersJson

java.lang.String getCompactionParametersJson()

setCompactionParameters

void setCompactionParameters(java.util.Map<java.lang.String,java.lang.String> options)

Sets the compaction parameters locally for this node Note that this will be set until an ALTER with compaction = {..} is executed or the node is restarted

Parameters:

options - compaction options map

getCompactionParameters

java.util.Map<java.lang.String,java.lang.String> getCompactionParameters()

getCompressionParameters

java.util.Map<java.lang.String,java.lang.String> getCompressionParameters()

Get the compression parameters

setCompressionParameters

void setCompressionParameters(java.util.Map<java.lang.String,java.lang.String> opts)

Set the compression parameters

Parameters:

opts - map of string names to values

setCrcCheckChance

void setCrcCheckChance(double crcCheckChance)

Set new crc check chance

isAutoCompactionDisabled

boolean isAutoCompactionDisabled()

estimateKeys

long estimateKeys()

getBuiltIndexes

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

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

Returns:

list of the index names

getSSTablesForKey

java.util.List<java.lang.String> getSSTablesForKey(java.lang.String key)

Returns a list of filenames that contain the given key on this node

Parameters:

key -

Returns:

list of filenames containing the key

loadNewSSTables

void loadNewSSTables()

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

getUnleveledSSTables

int getUnleveledSSTables()

Returns:

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

getSSTableCountPerLevel

int[] getSSTableCountPerLevel()

Returns:

sstable count for each level. null unless leveled compaction is used. array index corresponds to level(int[0] is for level 0, ...).

getDroppableTombstoneRatio

double getDroppableTombstoneRatio()

Get the ratio of droppable tombstones to real columns (and non-droppable tombstones)

Returns:

ratio

trueSnapshotsSize

long trueSnapshotsSize()

Returns:

the size of SSTables in "snapshots" subdirectory which aren't live anymore

beginLocalSampling

void beginLocalSampling(java.lang.String sampler,
                        int capacity)

begin sampling for a specific sampler with a given capacity. The cardinality may be larger than the capacity, but depending on the use case it may affect its accuracy

finishLocalSampling

javax.management.openmbean.CompositeData finishLocalSampling(java.lang.String sampler,
                                                             int count)
                                                      throws javax.management.openmbean.OpenDataException

Returns:

top count items for the sampler since beginLocalSampling was called

Throws:

javax.management.openmbean.OpenDataException

isCompactionDiskSpaceCheckEnabled

boolean isCompactionDiskSpaceCheckEnabled()

compactionDiskSpaceCheck

void compactionDiskSpaceCheck(boolean enable)