org.rocksdb

枚举 WALRecoveryMode

java.lang.Object

java.lang.Enum<WALRecoveryMode>

org.rocksdb.WALRecoveryMode

所有已实现的接口:

java.io.Serializable, java.lang.Comparable<WALRecoveryMode>

public enum WALRecoveryMode
extends java.lang.Enum<WALRecoveryMode>

The WAL Recover Mode

枚举常量概要

枚举常量

枚举常量和说明
AbsoluteConsistency Recover from clean shutdown We don't expect to find any corruption in the WAL Use case : This is ideal for unit tests and rare applications that can require high consistency guarantee
PointInTimeRecovery Recover to point-in-time consistency We stop the WAL playback on discovering WAL inconsistency Use case : Ideal for systems that have disk controller cache like hard disk, SSD without super capacitor that store related data
SkipAnyCorruptedRecords Recovery after a disaster We ignore any corruption in the WAL and try to salvage as much data as possible Use case : Ideal for last ditch effort to recover data or systems that operate with low grade unrelated data
TolerateCorruptedTailRecords Original levelDB recovery We tolerate incomplete record in trailing data on all logs Use case : This is legacy behavior (default)

方法概要

限定符和类型	方法和说明
byte	getValue() Returns the byte value of the enumerations value.
static WALRecoveryMode	getWALRecoveryMode(byte byteIdentifier) Get the WALRecoveryMode enumeration value by passing the byte identifier to this method.
static WALRecoveryMode	valueOf(java.lang.String name) 返回带有指定名称的该类型的枚举常量。
static WALRecoveryMode[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

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

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

TolerateCorruptedTailRecords

public static final WALRecoveryMode TolerateCorruptedTailRecords

Original levelDB recovery

We tolerate incomplete record in trailing data on all logs Use case : This is legacy behavior (default)

AbsoluteConsistency

public static final WALRecoveryMode AbsoluteConsistency

Recover from clean shutdown

We don't expect to find any corruption in the WAL Use case : This is ideal for unit tests and rare applications that can require high consistency guarantee

PointInTimeRecovery

public static final WALRecoveryMode PointInTimeRecovery

Recover to point-in-time consistency We stop the WAL playback on discovering WAL inconsistency Use case : Ideal for systems that have disk controller cache like hard disk, SSD without super capacitor that store related data

SkipAnyCorruptedRecords

public static final WALRecoveryMode SkipAnyCorruptedRecords

Recovery after a disaster We ignore any corruption in the WAL and try to salvage as much data as possible Use case : Ideal for last ditch effort to recover data or systems that operate with low grade unrelated data

方法详细资料

values

public static WALRecoveryMode[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (WALRecoveryMode c : WALRecoveryMode.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static WALRecoveryMode valueOf(java.lang.String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

java.lang.IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

java.lang.NullPointerException - 如果参数为空值

getValue

public byte getValue()

Returns the byte value of the enumerations value.

返回:

byte representation

getWALRecoveryMode

public static WALRecoveryMode getWALRecoveryMode(byte byteIdentifier)

Get the WALRecoveryMode enumeration value by passing the byte identifier to this method.

参数:

byteIdentifier - of WALRecoveryMode.

返回:

WALRecoveryMode instance.

抛出:

java.lang.IllegalArgumentException - If WALRecoveryMode cannot be found for the provided byteIdentifier