CompactionConfiguration (Apache HBase 1.1.7 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."

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_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()`
`int`	`getMaxFilesToCompact()`
`long`	`getMinCompactSize()`
`int`	`getMinFilesToCompact()`
`float`	`getMinLocalityToForceCompact()`
`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
```
    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_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
- 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.

Class CompactionConfiguration

Field Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

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_OFFPEAK_END_HOUR

HBASE_HSTORE_OFFPEAK_START_HOUR

HBASE_HSTORE_MIN_LOCALITY_TO_SKIP_MAJOR_COMPACT

Method Detail

toString

getMinCompactSize

getMaxCompactSize

getMinFilesToCompact

getMaxFilesToCompact

getCompactionRatio

getCompactionRatioOffPeak

getThrottlePoint

getMajorCompactionPeriod

getMajorCompactionJitter

getMinLocalityToForceCompact