org.apache.hadoop.hdfs.protocol

Enum LayoutVersion.Feature

java.lang.Object

java.lang.Enum<LayoutVersion.Feature>

org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature

All Implemented Interfaces:

Serializable, Comparable<LayoutVersion.Feature>, LayoutVersion.LayoutFeature

Enclosing class:

org.apache.hadoop.hdfs.protocol.LayoutVersion

public static enum LayoutVersion.Feature
extends Enum<LayoutVersion.Feature>
implements LayoutVersion.LayoutFeature

Enums for features that change the layout version before rolling upgrade is supported.

To add a new layout version:

• Define a new enum constant with a short enum name, the new layout version and description of the added feature.
• When adding a layout version with an ancestor that is not same as its immediate predecessor, use the constructor where a specific ancestor can be passed.

Enum Constant Summary

Enum Constants

Enum Constant and Description
ADD_DATANODE_AND_STORAGE_UUIDS
ADD_INODE_ID
ADD_LAYOUT_FLAGS
APPEND_RBW_DIR
ATOMIC_RENAME
CACHING
CONCAT
DELEGATION_TOKEN
DISKSPACE_QUOTA
EDITLOG_ADD_BLOCK
EDITLOG_OP_OPTIMIZATION
EDITLOG_SUPPORT_RETRYCACHE
EDITS_CHECKSUM
EXTENDED_ACL
FEDERATION
FILE_ACCESS_TIME
FSIMAGE_CHECKSUM
FSIMAGE_COMPRESSION
FSIMAGE_NAME_OPTIMIZATION
LEASE_REASSIGNMENT
NAMESPACE_QUOTA
OPTIMIZE_PERSIST_BLOCKS
OPTIMIZE_SNAPSHOT_INODES
PROTOBUF_FORMAT
REMOVE_REL13_DISK_LAYOUT_SUPPORT
RESERVED_REL1_2_0
RESERVED_REL1_3_0
RESERVED_REL2_4_0
RESERVED_REL20_203
RESERVED_REL20_204
RESERVED_REL22
RESERVED_REL23
SEQUENTIAL_BLOCK_ID
SNAPSHOT
STICKY_BIT
STORED_TXIDS
SYMLINKS
TXID_BASED_LAYOUT
UNUSED

Method Summary

Methods

Modifier and Type	Method and Description
LayoutVersion.FeatureInfo	getInfo()
static LayoutVersion.Feature	valueOf(String name) Returns the enum constant of this type with the specified name.
static LayoutVersion.Feature[]	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

NAMESPACE_QUOTA

public static final LayoutVersion.Feature NAMESPACE_QUOTA

FILE_ACCESS_TIME

public static final LayoutVersion.Feature FILE_ACCESS_TIME

DISKSPACE_QUOTA

public static final LayoutVersion.Feature DISKSPACE_QUOTA

STICKY_BIT

public static final LayoutVersion.Feature STICKY_BIT

APPEND_RBW_DIR

public static final LayoutVersion.Feature APPEND_RBW_DIR

ATOMIC_RENAME

public static final LayoutVersion.Feature ATOMIC_RENAME

CONCAT

public static final LayoutVersion.Feature CONCAT

SYMLINKS

public static final LayoutVersion.Feature SYMLINKS

DELEGATION_TOKEN

public static final LayoutVersion.Feature DELEGATION_TOKEN

FSIMAGE_COMPRESSION

public static final LayoutVersion.Feature FSIMAGE_COMPRESSION

FSIMAGE_CHECKSUM

public static final LayoutVersion.Feature FSIMAGE_CHECKSUM

REMOVE_REL13_DISK_LAYOUT_SUPPORT

public static final LayoutVersion.Feature REMOVE_REL13_DISK_LAYOUT_SUPPORT

EDITS_CHECKSUM

public static final LayoutVersion.Feature EDITS_CHECKSUM

UNUSED

public static final LayoutVersion.Feature UNUSED

FSIMAGE_NAME_OPTIMIZATION

public static final LayoutVersion.Feature FSIMAGE_NAME_OPTIMIZATION

RESERVED_REL20_203

public static final LayoutVersion.Feature RESERVED_REL20_203

RESERVED_REL20_204

public static final LayoutVersion.Feature RESERVED_REL20_204

RESERVED_REL22

public static final LayoutVersion.Feature RESERVED_REL22

RESERVED_REL23

public static final LayoutVersion.Feature RESERVED_REL23

FEDERATION

public static final LayoutVersion.Feature FEDERATION

LEASE_REASSIGNMENT

public static final LayoutVersion.Feature LEASE_REASSIGNMENT

STORED_TXIDS

public static final LayoutVersion.Feature STORED_TXIDS

TXID_BASED_LAYOUT

public static final LayoutVersion.Feature TXID_BASED_LAYOUT

EDITLOG_OP_OPTIMIZATION

public static final LayoutVersion.Feature EDITLOG_OP_OPTIMIZATION

OPTIMIZE_PERSIST_BLOCKS

public static final LayoutVersion.Feature OPTIMIZE_PERSIST_BLOCKS

RESERVED_REL1_2_0

public static final LayoutVersion.Feature RESERVED_REL1_2_0

ADD_INODE_ID

public static final LayoutVersion.Feature ADD_INODE_ID

SNAPSHOT

public static final LayoutVersion.Feature SNAPSHOT

RESERVED_REL1_3_0

public static final LayoutVersion.Feature RESERVED_REL1_3_0

OPTIMIZE_SNAPSHOT_INODES

public static final LayoutVersion.Feature OPTIMIZE_SNAPSHOT_INODES

SEQUENTIAL_BLOCK_ID

public static final LayoutVersion.Feature SEQUENTIAL_BLOCK_ID

EDITLOG_SUPPORT_RETRYCACHE

public static final LayoutVersion.Feature EDITLOG_SUPPORT_RETRYCACHE

EDITLOG_ADD_BLOCK

public static final LayoutVersion.Feature EDITLOG_ADD_BLOCK

ADD_DATANODE_AND_STORAGE_UUIDS

public static final LayoutVersion.Feature ADD_DATANODE_AND_STORAGE_UUIDS

ADD_LAYOUT_FLAGS

public static final LayoutVersion.Feature ADD_LAYOUT_FLAGS

CACHING

public static final LayoutVersion.Feature CACHING

PROTOBUF_FORMAT

public static final LayoutVersion.Feature PROTOBUF_FORMAT

EXTENDED_ACL

public static final LayoutVersion.Feature EXTENDED_ACL

RESERVED_REL2_4_0

public static final LayoutVersion.Feature RESERVED_REL2_4_0

Method Detail

values

public static LayoutVersion.Feature[] 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 (LayoutVersion.Feature c : LayoutVersion.Feature.values())
    System.out.println(c);

Returns:

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

valueOf

public static LayoutVersion.Feature 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

getInfo

public LayoutVersion.FeatureInfo getInfo()

Specified by:

getInfo in interface LayoutVersion.LayoutFeature