org.apache.cassandra.db
Interface ColumnFamilyStoreMBean

All Known Implementing Classes:

ColumnFamilyStore

public interface ColumnFamilyStoreMBean

The MBean interface for ColumnFamilyStore

Method Summary

void	disableAutoCompaction() Disable automatic compaction.
long	estimateKeys()
void	forceMajorCompaction() force a major compaction of this column family
long	getBloomFilterDiskSpaceUsed()
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
java.lang.String	getColumnFamilyName()
java.lang.String	getCompactionStrategyClass() Gets the compaction strategy class name
java.util.Map<java.lang.String,java.lang.String>	getCompressionParameters() Get the compression parameters
double	getCompressionRatio()
long[]	getEstimatedColumnCountHistogram()
long[]	getEstimatedRowSizeHistogram()
long[]	getLifetimeReadLatencyHistogramMicros()
long[]	getLifetimeWriteLatencyHistogramMicros()
long	getLiveDiskSpaceUsed()
int	getLiveSSTableCount()
int	getMaximumCompactionThreshold() Gets the maximum number of sstables in queue before compaction kicks off
long	getMaxRowSize()
long	getMeanRowSize()
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.
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()
int	getPendingTasks()
long	getReadCount()
long	getRecentBloomFilterFalsePositives()
double	getRecentBloomFilterFalseRatio()
long[]	getRecentReadLatencyHistogramMicros()
double	getRecentReadLatencyMicros()
long[]	getRecentSSTablesPerReadHistogram()
long[]	getRecentWriteLatencyHistogramMicros()
double	getRecentWriteLatencyMicros()
long[]	getSSTablesPerReadHistogram()
long	getTotalDiskSpaceUsed()
long	getTotalReadLatencyMicros()
long	getTotalWriteLatencyMicros()
int	getUnleveledSSTables()
long	getWriteCount()
void	loadNewSSTables() Scan through Keyspace/ColumnFamily's data directory determine which SSTables should be loaded and load them
void	setCompactionStrategyClass(java.lang.String className) Sets the compaction strategy by class name
void	setCompressionParameters(java.util.Map<java.lang.String,java.lang.String> opts) Set the compression parameters
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

Method Detail

getColumnFamilyName

java.lang.String getColumnFamilyName()

Returns:

the name of the column family

getMemtableDataSize

long getMemtableDataSize()

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

Returns:

The size in bytes.

getMemtableColumnsCount

long getMemtableColumnsCount()

Returns the total number of columns present in the memtable.

Returns:

The number of columns.

getMemtableSwitchCount

int getMemtableSwitchCount()

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

Returns:

the number of memtable switches

getRecentSSTablesPerReadHistogram

long[] getRecentSSTablesPerReadHistogram()

Returns:

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

getSSTablesPerReadHistogram

long[] getSSTablesPerReadHistogram()

Returns:

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

getReadCount

long getReadCount()

Returns:

the number of read operations on this column family

getTotalReadLatencyMicros

long getTotalReadLatencyMicros()

Returns:

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

getLifetimeReadLatencyHistogramMicros

long[] getLifetimeReadLatencyHistogramMicros()

Returns:

an array representing the latency histogram

getRecentReadLatencyHistogramMicros

long[] getRecentReadLatencyHistogramMicros()

Returns:

an array representing the latency histogram

getRecentReadLatencyMicros

double getRecentReadLatencyMicros()

Returns:

average latency per read operation since the last call

getWriteCount

long getWriteCount()

Returns:

the number of write operations on this column family

getTotalWriteLatencyMicros

long getTotalWriteLatencyMicros()

Returns:

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

getLifetimeWriteLatencyHistogramMicros

long[] getLifetimeWriteLatencyHistogramMicros()

Returns:

an array representing the latency histogram

getRecentWriteLatencyHistogramMicros

long[] getRecentWriteLatencyHistogramMicros()

Returns:

an array representing the latency histogram

getRecentWriteLatencyMicros

double getRecentWriteLatencyMicros()

Returns:

average latency per write operation since the last call

getPendingTasks

int getPendingTasks()

Returns:

the estimated number of tasks pending for this column family

getLiveSSTableCount

int getLiveSSTableCount()

Returns:

the number of SSTables on disk for this CF

getLiveDiskSpaceUsed

long getLiveDiskSpaceUsed()

Returns:

disk space used by SSTables belonging to this CF

getTotalDiskSpaceUsed

long getTotalDiskSpaceUsed()

Returns:

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

forceMajorCompaction

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

force a major compaction of this column family

Throws:

java.util.concurrent.ExecutionException

java.lang.InterruptedException

getMinRowSize

long getMinRowSize()

Returns:

the size of the smallest compacted row

getMaxRowSize

long getMaxRowSize()

Returns:

the size of the largest compacted row

getMeanRowSize

long getMeanRowSize()

Returns:

the size of the smallest compacted row

getBloomFilterFalsePositives

long getBloomFilterFalsePositives()

getRecentBloomFilterFalsePositives

long getRecentBloomFilterFalsePositives()

getBloomFilterFalseRatio

double getBloomFilterFalseRatio()

getRecentBloomFilterFalseRatio

double getRecentBloomFilterFalseRatio()

getBloomFilterDiskSpaceUsed

long getBloomFilterDiskSpaceUsed()

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

setMaximumCompactionThreshold

void setMaximumCompactionThreshold(int threshold)

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

setCompactionStrategyClass

void setCompactionStrategyClass(java.lang.String className)
                                throws ConfigurationException

Sets the compaction strategy by class name

Parameters:

className - the name of the compaction strategy class

Throws:

ConfigurationException

getCompactionStrategyClass

java.lang.String getCompactionStrategyClass()

Gets the compaction strategy class name

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)
                              throws ConfigurationException

Set the compression parameters

Parameters:

opts - map of string names to values

Throws:

ConfigurationException

disableAutoCompaction

void disableAutoCompaction()

Disable automatic compaction.

estimateKeys

long estimateKeys()

getEstimatedRowSizeHistogram

long[] getEstimatedRowSizeHistogram()

getEstimatedColumnCountHistogram

long[] getEstimatedColumnCountHistogram()

getCompressionRatio

double getCompressionRatio()

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

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.