Package org.rocksdb

Enum Class CompactionStyle

java.lang.Object

java.lang.Enum<CompactionStyle>

org.rocksdb.CompactionStyle

All Implemented Interfaces:

Serializable, Comparable<CompactionStyle>, Constable

public enum CompactionStyle
extends Enum<CompactionStyle>

Enum CompactionStyle

RocksDB supports different styles of compaction. Available compaction styles can be chosen using this enumeration.

1. LEVEL - Level based Compaction style
2. UNIVERSAL - Universal Compaction Style is a compaction style, targeting the use cases requiring lower write amplification, trading off read amplification and space amplification.
3. FIFO - FIFO compaction style is the simplest compaction strategy. It is suited for keeping event log data with very low overhead (query log for example). It periodically deletes the old data, so it's basically a TTL compaction style.
4. NONE - Disable background compaction. Compaction jobs are submitted RocksDB.compactFiles(CompactionOptions, ColumnFamilyHandle, java.util.List, int, int, CompactionJobInfo) ()}.

See Also:

• Universal Compaction
• FIFO Compaction

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
FIFO
LEVEL
NONE
UNIVERSAL

Method Summary

Modifier and Type	Method	Description
byte	getValue()	Get the internal representation value.
static CompactionStyle	valueOf(String name)	Returns the enum constant of this class with the specified name.
static CompactionStyle[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

LEVEL

public static final CompactionStyle LEVEL

UNIVERSAL

public static final CompactionStyle UNIVERSAL

FIFO

public static final CompactionStyle FIFO

NONE

public static final CompactionStyle NONE

Method Details

values

public static CompactionStyle[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static CompactionStyle valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

getValue

public byte getValue()

Get the internal representation value.

Returns:

the internal representation value.