Package org.apache.hadoop.hdfs.server.namenode

Class INodeId

java.lang.Object

org.apache.hadoop.util.SequentialNumber

org.apache.hadoop.hdfs.server.namenode.INodeId

All Implemented Interfaces:

org.apache.hadoop.util.IdGenerator

@Private
public class INodeId
extends org.apache.hadoop.util.SequentialNumber

An id which uniquely identifies an inode. Id 1 to 16384 are reserved for potential future usage. The id won't be recycled and is not expected to wrap around in a very long time. Root inode id is always 16385. Id 0 is used for backward compatibility support.

Field Summary

Fields

Modifier and Type	Field	Description
static final long	INVALID_INODE_ID
static final long	LAST_RESERVED_ID	The last reserved inode id.
static final long	ROOT_INODE_ID

Method Summary

Methods inherited from class org.apache.hadoop.util.SequentialNumber

equals, getCurrentValue, hashCode, nextValue, setCurrentValue, setIfGreater, skipTo

Methods inherited from class java.lang.Object

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

Field Details

LAST_RESERVED_ID

public static final long LAST_RESERVED_ID

The last reserved inode id. InodeIDs are allocated from LAST_RESERVED_ID + 1.

See Also:

• Constant Field Values

ROOT_INODE_ID

public static final long ROOT_INODE_ID

See Also:

• Constant Field Values

INVALID_INODE_ID

public static final long INVALID_INODE_ID

See Also:

• Constant Field Values