org.apache.hadoop.hbase.regionserver.compactions

Class CompactionConfiguration

java.lang.Object

org.apache.hadoop.hbase.regionserver.compactions.CompactionConfiguration

@InterfaceAudience.Private
public class CompactionConfiguration
extends Object

Compaction configuration for a particular instance of HStore. Takes into account both global settings and ones set on the column family/store. Control knobs for default compaction algorithm:

maxCompactSize - upper bound on file size to be included in minor compactions minCompactSize - lower bound below which compaction is selected without ratio test minFilesToCompact - lower bound on number of files in any minor compaction maxFilesToCompact - upper bound on number of files in any minor compaction compactionRatio - Ratio used for compaction minLocalityToForceCompact - Locality threshold for a store file to major compact (HBASE-11195)

Set parameter as "hbase.hstore.compaction.<attribute>"

Field Summary

Fields

Modifier and Type	Field and Description
static String	HBASE_HSTORE_COMPACTION_MAX_KEY
static String	HBASE_HSTORE_COMPACTION_MAX_SIZE_KEY
static String	HBASE_HSTORE_COMPACTION_MAX_SIZE_OFFPEAK_KEY
static String	HBASE_HSTORE_COMPACTION_MIN_KEY
static String	HBASE_HSTORE_COMPACTION_MIN_SIZE_KEY
static String	HBASE_HSTORE_COMPACTION_RATIO_KEY
static String	HBASE_HSTORE_COMPACTION_RATIO_OFFPEAK_KEY
static String	HBASE_HSTORE_MIN_LOCALITY_TO_SKIP_MAJOR_COMPACT
static String	HBASE_HSTORE_OFFPEAK_END_HOUR
static String	HBASE_HSTORE_OFFPEAK_START_HOUR

Method Summary

Methods

Modifier and Type	Method and Description
double	getCompactionRatio()
double	getCompactionRatioOffPeak()
float	getMajorCompactionJitter()
long	getMajorCompactionPeriod()
long	getMaxCompactSize()
long	getMaxCompactSize(boolean mayUseOffpeak)
int	getMaxFilesToCompact()
long	getMinCompactSize()
int	getMinFilesToCompact()
float	getMinLocalityToForceCompact()
long	getOffPeakMaxCompactSize()
long	getThrottlePoint()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

HBASE_HSTORE_COMPACTION_RATIO_KEY

public static final String HBASE_HSTORE_COMPACTION_RATIO_KEY

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Constant Field Values

HBASE_HSTORE_COMPACTION_RATIO_OFFPEAK_KEY

public static final String HBASE_HSTORE_COMPACTION_RATIO_OFFPEAK_KEY

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Constant Field Values

HBASE_HSTORE_COMPACTION_MIN_KEY

public static final String HBASE_HSTORE_COMPACTION_MIN_KEY

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Constant Field Values

HBASE_HSTORE_COMPACTION_MIN_SIZE_KEY

public static final String HBASE_HSTORE_COMPACTION_MIN_SIZE_KEY

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Constant Field Values

HBASE_HSTORE_COMPACTION_MAX_KEY

public static final String HBASE_HSTORE_COMPACTION_MAX_KEY

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Constant Field Values

HBASE_HSTORE_COMPACTION_MAX_SIZE_KEY

public static final String HBASE_HSTORE_COMPACTION_MAX_SIZE_KEY

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Constant Field Values

HBASE_HSTORE_COMPACTION_MAX_SIZE_OFFPEAK_KEY

public static final String HBASE_HSTORE_COMPACTION_MAX_SIZE_OFFPEAK_KEY

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Constant Field Values

HBASE_HSTORE_OFFPEAK_END_HOUR

public static final String HBASE_HSTORE_OFFPEAK_END_HOUR

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Constant Field Values

HBASE_HSTORE_OFFPEAK_START_HOUR

public static final String HBASE_HSTORE_OFFPEAK_START_HOUR

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Constant Field Values

HBASE_HSTORE_MIN_LOCALITY_TO_SKIP_MAJOR_COMPACT

public static final String HBASE_HSTORE_MIN_LOCALITY_TO_SKIP_MAJOR_COMPACT

See Also:

Constant Field Values

Method Detail

toString

public String toString()

Overrides:

toString in class Object

getMinCompactSize

public long getMinCompactSize()

Returns:

lower bound below which compaction is selected without ratio test

getMaxCompactSize

public long getMaxCompactSize()

Returns:

upper bound on file size to be included in minor compactions

getMinFilesToCompact

public int getMinFilesToCompact()

Returns:

upper bound on number of files to be included in minor compactions

getMaxFilesToCompact

public int getMaxFilesToCompact()

Returns:

upper bound on number of files to be included in minor compactions

getCompactionRatio

public double getCompactionRatio()

Returns:

Ratio used for compaction

getCompactionRatioOffPeak

public double getCompactionRatioOffPeak()

Returns:

Off peak Ratio used for compaction

getThrottlePoint

public long getThrottlePoint()

Returns:

ThrottlePoint used for classifying small and large compactions

getMajorCompactionPeriod

public long getMajorCompactionPeriod()

Returns:

Major compaction period from compaction. Major compactions are selected periodically according to this parameter plus jitter

getMajorCompactionJitter

public float getMajorCompactionJitter()

Returns:

Major the jitter fraction, the fraction within which the major compaction period is randomly chosen from the majorCompactionPeriod in each store.

getMinLocalityToForceCompact

public float getMinLocalityToForceCompact()

Returns:

Block locality ratio, the ratio at which we will include old regions with a single store file for major compaction. Used to improve block locality for regions that haven't had writes in a while but are still being read.

getOffPeakMaxCompactSize

public long getOffPeakMaxCompactSize()

getMaxCompactSize

public long getMaxCompactSize(boolean mayUseOffpeak)