org.apache.hadoop.hdfs
Enum StorageType

java.lang.Object
  java.lang.Enum<StorageType>
      org.apache.hadoop.hdfs.StorageType

All Implemented Interfaces:

Serializable, Comparable<StorageType>

@InterfaceAudience.Public
@InterfaceStability.Unstable
public enum StorageType
extends Enum<StorageType>

Defines the types of supported storage media. The default storage medium is assumed to be DISK.

Enum Constant Summary

ARCHIVE

DISK

RAM_DISK

SSD

Field Summary

static StorageType	DEFAULT
static StorageType[]	EMPTY_ARRAY

Method Summary

static List<StorageType>	asList()
static List<StorageType>	getMovableTypes()
boolean	isMovable()
boolean	isTransient()
static StorageType	valueOf(String name) Returns the enum constant of this type with the specified name.
static StorageType[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

DISK

public static final StorageType DISK

SSD

public static final StorageType SSD

ARCHIVE

public static final StorageType ARCHIVE

RAM_DISK

public static final StorageType RAM_DISK

Field Detail

DEFAULT

public static final StorageType DEFAULT

EMPTY_ARRAY

public static final StorageType[] EMPTY_ARRAY

Method Detail

values

public static StorageType[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

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

Returns:

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

valueOf

public static StorageType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name

NullPointerException - if the argument is null

isTransient

public boolean isTransient()

isMovable

public boolean isMovable()

asList

public static List<StorageType> asList()

getMovableTypes

public static List<StorageType> getMovableTypes()