org.apache.cassandra.db.compaction

Interface CompactionManagerMBean

All Known Implementing Classes:

CompactionManager

public interface CompactionManagerMBean

Method Summary

Modifier and Type	Method and Description
void	forceUserDefinedCompaction(java.lang.String dataFiles) Triggers the compaction of user specified sstables.
javax.management.openmbean.TabularData	getCompactionHistory() compaction history
java.util.List<java.util.Map<java.lang.String,java.lang.String>>	getCompactions() List of running compaction objects.
java.util.List<java.lang.String>	getCompactionSummary() List of running compaction summary strings.
int	getCoreCompactorThreads() Returns core size of compaction thread pool
int	getCoreValidationThreads() Returns core size of validation thread pool
int	getMaximumCompactorThreads() Returns maximum size of compaction thread pool
int	getMaximumValidatorThreads() Returns size of validator thread pool
void	setCoreCompactorThreads(int number) Allows user to resize maximum size of the compaction thread pool.
void	setCoreValidationThreads(int number) Allows user to resize maximum size of the compaction thread pool.
void	setMaximumCompactorThreads(int number) Allows user to resize maximum size of the compaction thread pool.
void	setMaximumValidatorThreads(int number) Allows user to resize maximum size of the validator thread pool.
void	stopCompaction(java.lang.String type) Stop all running compaction-like tasks having the provided type.
void	stopCompactionById(java.lang.String compactionId) Stop an individual running compaction using the compactionId.

Method Detail

getCompactions

java.util.List<java.util.Map<java.lang.String,java.lang.String>> getCompactions()

List of running compaction objects.

getCompactionSummary

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

List of running compaction summary strings.

getCompactionHistory

javax.management.openmbean.TabularData getCompactionHistory()

compaction history

forceUserDefinedCompaction

void forceUserDefinedCompaction(java.lang.String dataFiles)

Triggers the compaction of user specified sstables. You can specify files from various keyspaces and columnfamilies. If you do so, user defined compaction is performed several times to the groups of files in the same keyspace/columnfamily.

Parameters:

dataFiles - a comma separated list of sstable file to compact. must contain keyspace and columnfamily name in path(for 2.1+) or file name itself.

stopCompaction

void stopCompaction(java.lang.String type)

Stop all running compaction-like tasks having the provided type.

Parameters:

type - the type of compaction to stop. Can be one of: - COMPACTION - VALIDATION - CLEANUP - SCRUB - INDEX_BUILD

stopCompactionById

void stopCompactionById(java.lang.String compactionId)

Stop an individual running compaction using the compactionId.

Parameters:

compactionId - Compaction ID of compaction to stop. Such IDs can be found in the transaction log files whose name starts with compaction_, located in the table transactions folder.

getCoreCompactorThreads

int getCoreCompactorThreads()

Returns core size of compaction thread pool

setCoreCompactorThreads

void setCoreCompactorThreads(int number)

Allows user to resize maximum size of the compaction thread pool.

Parameters:

number - New maximum of compaction threads

getMaximumCompactorThreads

int getMaximumCompactorThreads()

Returns maximum size of compaction thread pool

setMaximumCompactorThreads

void setMaximumCompactorThreads(int number)

Allows user to resize maximum size of the compaction thread pool.

Parameters:

number - New maximum of compaction threads

getCoreValidationThreads

int getCoreValidationThreads()

Returns core size of validation thread pool

setCoreValidationThreads

void setCoreValidationThreads(int number)

Allows user to resize maximum size of the compaction thread pool.

Parameters:

number - New maximum of compaction threads

getMaximumValidatorThreads

int getMaximumValidatorThreads()

Returns size of validator thread pool

setMaximumValidatorThreads

void setMaximumValidatorThreads(int number)

Allows user to resize maximum size of the validator thread pool.

Parameters:

number - New maximum of validator threads