CompactionConfiguration (Apache HBase 1.2.12 API)

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
`private double`	`compactionRatio`
`(package private) org.apache.hadoop.conf.Configuration`	`conf`
`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`
`private static org.apache.commons.logging.Log`	`LOG`
`private float`	`majorCompactionJitter`
`private long`	`majorCompactionPeriod`
`private long`	`maxCompactSize` Since all these properties can change online, they are volatile
`private int`	`maxFilesToCompact`
`private long`	`minCompactSize`
`private int`	`minFilesToCompact`
`private float`	`minLocalityToForceCompact`
`private double`	`offPeakCompactionRatio`
`private long`	`offPeakMaxCompactSize`
`(package private) StoreConfigInformation`	`storeConfigInfo`
`private long`	`throttlePoint`

Constructor Summary

Constructors
Constructor and Description

CompactionConfiguration(org.apache.hadoop.conf.Configuration conf, StoreConfigInformation storeConfigInfo)

Constructors
Constructor and Description
`CompactionConfiguration(org.apache.hadoop.conf.Configuration conf, StoreConfigInformation storeConfigInfo)`

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
  - LOG
```
private static final org.apache.commons.logging.Log LOG
```
  - HBASE_HSTORE_COMPACTION_RATIO_KEY
```
public static final String HBASE_HSTORE_COMPACTION_RATIO_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_COMPACTION_RATIO_OFFPEAK_KEY
```
public static final String HBASE_HSTORE_COMPACTION_RATIO_OFFPEAK_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_COMPACTION_MIN_KEY
```
public static final String HBASE_HSTORE_COMPACTION_MIN_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_COMPACTION_MIN_SIZE_KEY
```
public static final String HBASE_HSTORE_COMPACTION_MIN_SIZE_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_COMPACTION_MAX_KEY
```
public static final String HBASE_HSTORE_COMPACTION_MAX_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_COMPACTION_MAX_SIZE_KEY
```
public static final String HBASE_HSTORE_COMPACTION_MAX_SIZE_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_COMPACTION_MAX_SIZE_OFFPEAK_KEY
```
public static final String HBASE_HSTORE_COMPACTION_MAX_SIZE_OFFPEAK_KEY
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_OFFPEAK_END_HOUR
```
public static final String HBASE_HSTORE_OFFPEAK_END_HOUR
```
    See Also:
    Constant Field Values
  - HBASE_HSTORE_OFFPEAK_START_HOUR
```
public static final String HBASE_HSTORE_OFFPEAK_START_HOUR
```
    See Also:
    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
  - conf
```
org.apache.hadoop.conf.Configuration conf
```
  - storeConfigInfo
```
StoreConfigInformation storeConfigInfo
```
  - offPeakCompactionRatio
```
private final double offPeakCompactionRatio
```
  - maxCompactSize
```
private final long maxCompactSize
```
    Since all these properties can change online, they are volatile
  - offPeakMaxCompactSize
```
private final long offPeakMaxCompactSize
```
  - minCompactSize
```
private final long minCompactSize
```
  - minFilesToCompact
```
private final int minFilesToCompact
```
  - maxFilesToCompact
```
private final int maxFilesToCompact
```
  - compactionRatio
```
private final double compactionRatio
```
  - throttlePoint
```
private final long throttlePoint
```
  - majorCompactionPeriod
```
private final long majorCompactionPeriod
```
  - majorCompactionJitter
```
private final float majorCompactionJitter
```
  - minLocalityToForceCompact
```
private final float minLocalityToForceCompact
```
- Constructor Detail
  - CompactionConfiguration
```
CompactionConfiguration(org.apache.hadoop.conf.Configuration conf,
                       StoreConfigInformation storeConfigInfo)
```
- 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)
```

Class CompactionConfiguration

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

LOG

HBASE_HSTORE_COMPACTION_RATIO_KEY

HBASE_HSTORE_COMPACTION_RATIO_OFFPEAK_KEY

HBASE_HSTORE_COMPACTION_MIN_KEY

HBASE_HSTORE_COMPACTION_MIN_SIZE_KEY

HBASE_HSTORE_COMPACTION_MAX_KEY

HBASE_HSTORE_COMPACTION_MAX_SIZE_KEY

HBASE_HSTORE_COMPACTION_MAX_SIZE_OFFPEAK_KEY

HBASE_HSTORE_OFFPEAK_END_HOUR

HBASE_HSTORE_OFFPEAK_START_HOUR

HBASE_HSTORE_MIN_LOCALITY_TO_SKIP_MAJOR_COMPACT

conf

storeConfigInfo

offPeakCompactionRatio

maxCompactSize

offPeakMaxCompactSize

minCompactSize

minFilesToCompact

maxFilesToCompact

compactionRatio

throttlePoint

majorCompactionPeriod

majorCompactionJitter

minLocalityToForceCompact

Constructor Detail

CompactionConfiguration

Method Detail

toString

getMinCompactSize

getMaxCompactSize

getMinFilesToCompact

getMaxFilesToCompact

getCompactionRatio

getCompactionRatioOffPeak

getThrottlePoint

getMajorCompactionPeriod

getMajorCompactionJitter

getMinLocalityToForceCompact

getOffPeakMaxCompactSize

getMaxCompactSize