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

static int	ID_BIT_LENGTH
static byte	ID_UNSPECIFIED
static String	STORAGE_POLICY_XATTR_NAME
static XAttr.NameSpace	XAttrNS

Constructor Summary

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

Method Summary

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 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 String STORAGE_POLICY_XATTR_NAME

See Also:

Constant Field Values

XAttrNS

public static final XAttr.NameSpace XAttrNS

ID_BIT_LENGTH

public static final int ID_BIT_LENGTH

See Also:

Constant Field Values

ID_UNSPECIFIED

public static final byte ID_UNSPECIFIED

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)

isStoragePolicyXAttr

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