Package org.apache.hadoop.hdfs.server.datanode

Class DataNodeLayoutVersion

java.lang.Object

org.apache.hadoop.hdfs.server.datanode.DataNodeLayoutVersion

@Private
public class DataNodeLayoutVersion
extends Object

Nested Class Summary

Nested Classes

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

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
DataNodeLayoutVersion()

Method Summary

Modifier and Type	Method	Description
static int	getCurrentLayoutVersion()	Get current layout version of the DataNode.
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

Constructor Details

DataNodeLayoutVersion

public DataNodeLayoutVersion()

Method Details

getCurrentLayoutVersion

public static int getCurrentLayoutVersion()

Get current layout version of the DataNode.

Returns:

the current layout version of the DataNode

getFeatures

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

supports

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