Package org.apache.hadoop.hdfs.server.namenode

Class NameNodeLayoutVersion

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.NameNodeLayoutVersion

@Private
public class NameNodeLayoutVersion
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NameNodeLayoutVersion.Feature	Enums for features that change the layout version.

Field Summary

Fields

Modifier and Type	Field	Description
static int	CURRENT_LAYOUT_VERSION
static java.util.Map<java.lang.Integer,java.util.SortedSet<LayoutVersion.LayoutFeature>>	FEATURES	Build layout version and corresponding feature matrix
static int	MINIMUM_COMPATIBLE_LAYOUT_VERSION

Constructor Summary

Constructors

Constructor	Description
NameNodeLayoutVersion()

Method Summary

Modifier and Type	Method	Description
static java.util.SortedSet<LayoutVersion.LayoutFeature>	getFeatures(int lv)
static boolean	supports(LayoutVersion.LayoutFeature f, int lv)

Methods inherited from class java.lang.Object

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

Field Detail

FEATURES

public static final java.util.Map<java.lang.Integer,java.util.SortedSet<LayoutVersion.LayoutFeature>> FEATURES

Build layout version and corresponding feature matrix

CURRENT_LAYOUT_VERSION

public static final int CURRENT_LAYOUT_VERSION

MINIMUM_COMPATIBLE_LAYOUT_VERSION

public static final int MINIMUM_COMPATIBLE_LAYOUT_VERSION

Constructor Detail

NameNodeLayoutVersion

public NameNodeLayoutVersion()

Method Detail

getFeatures

public static java.util.SortedSet<LayoutVersion.LayoutFeature> getFeatures(int lv)

supports

public static boolean supports(LayoutVersion.LayoutFeature f,
                               int lv)