Package org.apache.hadoop.hdfs.server.blockmanagement

Class BlockStoragePolicySuite

java.lang.Object

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

public class BlockStoragePolicySuite
extends java.lang.Object

A collection of block storage policies.

Field Summary

Fields

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
static org.apache.hadoop.fs.XAttr	buildXAttr(byte policyId)
static java.lang.String	buildXAttrName()
static BlockStoragePolicySuite	createDefaultSuite()
static BlockStoragePolicySuite	createDefaultSuite(org.apache.hadoop.conf.Configuration conf)
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(java.lang.String policyName)
static java.lang.String	getStoragePolicyXAttrPrefixedName()
static boolean	isStoragePolicyXAttr(org.apache.hadoop.fs.XAttr xattr)

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 java.lang.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

@VisibleForTesting
public static BlockStoragePolicySuite createDefaultSuite()

createDefaultSuite

@VisibleForTesting
public static BlockStoragePolicySuite createDefaultSuite(org.apache.hadoop.conf.Configuration conf)

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(java.lang.String policyName)

getAllPolicies

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

buildXAttrName

public static java.lang.String buildXAttrName()

buildXAttr

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

getStoragePolicyXAttrPrefixedName

public static java.lang.String getStoragePolicyXAttrPrefixedName()

isStoragePolicyXAttr

public static boolean isStoragePolicyXAttr(org.apache.hadoop.fs.XAttr xattr)