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

Class NameNodeLayoutVersion

java.lang.Object

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

@Private
public class NameNodeLayoutVersion
extends Object

Nested Class Summary

Nested Classes

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

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
NameNodeLayoutVersion()

Method Summary

Modifier and Type	Method	Description
static 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 Details

FEATURES

public static final Map<Integer,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 Details

NameNodeLayoutVersion

public NameNodeLayoutVersion()

Method Details

getFeatures

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

supports

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