org.apache.hadoop.hdfs.server.blockmanagement

Class BlockStoragePolicySuite

java.lang.Object

org.apache.hadoop.hdfs.server.blockmanagement.BlockStoragePolicySuite

public class BlockStoragePolicySuite
extends Object

A collection of block storage policies.

Field Summary

Fields

Modifier and Type	Field and Description
static int	ID_BIT_LENGTH
static String	STORAGE_POLICY_XATTR_NAME
static org.apache.hadoop.fs.XAttr.NameSpace	XAttrNS

Constructor Summary

Constructors

Constructor and Description
BlockStoragePolicySuite(byte defaultPolicyID, org.apache.hadoop.hdfs.protocol.BlockStoragePolicy[] policies)

Method Summary

Methods

Modifier and Type	Method and Description
static org.apache.hadoop.fs.XAttr	buildXAttr(byte policyId)
static String	buildXAttrName()
static BlockStoragePolicySuite	createDefaultSuite()
org.apache.hadoop.hdfs.protocol.BlockStoragePolicy[]	getAllPolicies()
org.apache.hadoop.hdfs.protocol.BlockStoragePolicy	getDefaultPolicy()
org.apache.hadoop.hdfs.protocol.BlockStoragePolicy	getPolicy(byte id)
org.apache.hadoop.hdfs.protocol.BlockStoragePolicy	getPolicy(String policyName)
static String	getStoragePolicyXAttrPrefixedName()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

STORAGE_POLICY_XATTR_NAME

public static final String STORAGE_POLICY_XATTR_NAME

See Also:

Constant Field Values

XAttrNS

public static final org.apache.hadoop.fs.XAttr.NameSpace XAttrNS

ID_BIT_LENGTH

public static final int ID_BIT_LENGTH

See Also:

Constant Field Values

Constructor Detail

BlockStoragePolicySuite

public BlockStoragePolicySuite(byte defaultPolicyID,
                       org.apache.hadoop.hdfs.protocol.BlockStoragePolicy[] policies)

Method Detail

createDefaultSuite

public static BlockStoragePolicySuite createDefaultSuite()

getPolicy

public org.apache.hadoop.hdfs.protocol.BlockStoragePolicy getPolicy(byte id)

Returns:

the corresponding policy.

getDefaultPolicy

public org.apache.hadoop.hdfs.protocol.BlockStoragePolicy getDefaultPolicy()

Returns:

the default policy.

getPolicy

public org.apache.hadoop.hdfs.protocol.BlockStoragePolicy getPolicy(String policyName)

getAllPolicies

public org.apache.hadoop.hdfs.protocol.BlockStoragePolicy[] getAllPolicies()

buildXAttrName

public static String buildXAttrName()

buildXAttr

public static org.apache.hadoop.fs.XAttr buildXAttr(byte policyId)

getStoragePolicyXAttrPrefixedName

public static String getStoragePolicyXAttrPrefixedName()