org.apache.hadoop.hdfs.server.protocol

Class DatanodeStorage

java.lang.Object

org.apache.hadoop.hdfs.server.protocol.DatanodeStorage

public class DatanodeStorage
extends Object

Class captures information of a storage in Datanode.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DatanodeStorage.State The state of the storage.

Constructor Summary

Constructors

Constructor and Description
DatanodeStorage(String storageID) Create a storage with DatanodeStorage.State.NORMAL and StorageType.DEFAULT.
DatanodeStorage(String sid, DatanodeStorage.State s, org.apache.hadoop.fs.StorageType sm)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object other)
static String	generateUuid() Generate new storage ID.
DatanodeStorage.State	getState()
String	getStorageID()
org.apache.hadoop.fs.StorageType	getStorageType()
int	hashCode()
static boolean	isValidStorageId(String storageID) Verify that a given string is a storage ID in the "DS-..uuid.." format.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DatanodeStorage

public DatanodeStorage(String storageID)

Create a storage with DatanodeStorage.State.NORMAL and StorageType.DEFAULT.

DatanodeStorage

public DatanodeStorage(String sid,
               DatanodeStorage.State s,
               org.apache.hadoop.fs.StorageType sm)

Method Detail

getStorageID

public String getStorageID()

getState

public DatanodeStorage.State getState()

getStorageType

public org.apache.hadoop.fs.StorageType getStorageType()

generateUuid

public static String generateUuid()

Generate new storage ID. The format of this string can be changed in the future without requiring that old storage IDs be updated.

Returns:

unique storage ID

isValidStorageId

public static boolean isValidStorageId(String storageID)

Verify that a given string is a storage ID in the "DS-..uuid.." format.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object