Package org.apache.hadoop.fs

Enum StorageType

java.lang.Object

java.lang.Enum<StorageType>

org.apache.hadoop.fs.StorageType

All Implemented Interfaces:

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

@Public
@Unstable
public enum StorageType
extends java.lang.Enum<StorageType>

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

Enum Constant Summary

Enum Constants

Enum Constant	Description
ARCHIVE
DISK
NVDIMM
PROVIDED
RAM_DISK
SSD

Field Summary

Fields

Modifier and Type	Field	Description
static java.lang.String	CONF_KEY_HEADER
static StorageType	DEFAULT
static StorageType[]	EMPTY_ARRAY

Method Summary

Modifier and Type	Method	Description
static boolean	allowSameDiskTiering(StorageType storageType)
static java.util.List<StorageType>	asList()
static java.lang.String	getConf(Configuration conf, StorageType t, java.lang.String name)	Get the configured values for different StorageType.
static java.util.List<StorageType>	getMovableTypes()
static java.util.List<StorageType>	getTypesSupportingQuota()
boolean	isMovable()
boolean	isRAM()
boolean	isTransient()
static StorageType	parseStorageType(int i)
static StorageType	parseStorageType(java.lang.String s)
boolean	supportTypeQuota()
static StorageType	valueOf(java.lang.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

RAM_DISK

public static final StorageType RAM_DISK

SSD

public static final StorageType SSD

DISK

public static final StorageType DISK

ARCHIVE

public static final StorageType ARCHIVE

PROVIDED

public static final StorageType PROVIDED

NVDIMM

public static final StorageType NVDIMM

Field Detail

DEFAULT

public static final StorageType DEFAULT

EMPTY_ARRAY

public static final StorageType[] EMPTY_ARRAY

CONF_KEY_HEADER

public static final java.lang.String CONF_KEY_HEADER

See Also:

Constant Field Values

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(java.lang.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:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null

isTransient

public boolean isTransient()

isRAM

public boolean isRAM()

supportTypeQuota

public boolean supportTypeQuota()

isMovable

public boolean isMovable()

asList

public static java.util.List<StorageType> asList()

getMovableTypes

public static java.util.List<StorageType> getMovableTypes()

getTypesSupportingQuota

public static java.util.List<StorageType> getTypesSupportingQuota()

parseStorageType

public static StorageType parseStorageType(int i)

parseStorageType

public static StorageType parseStorageType(java.lang.String s)

allowSameDiskTiering

public static boolean allowSameDiskTiering(StorageType storageType)

getConf

public static java.lang.String getConf(Configuration conf,
                                       StorageType t,
                                       java.lang.String name)

Get the configured values for different StorageType.

Parameters:

conf - - absolute or fully qualified path

t - - the StorageType

name - - the sub-name of key

Returns:

the file system of the path