org.apache.hadoop.hdfs.server.namenode

类 FSEditLog

java.lang.Object

org.apache.hadoop.hdfs.server.namenode.FSEditLog

public class FSEditLog
extends Object

FSEditLog maintains a log of the namespace modifications.

字段概要

字段

限定符和类型	字段和说明
static org.apache.commons.logging.Log	LOG

方法概要

方法

限定符和类型	方法和说明
void	close() Shutdown the file store.
void	createEditLogFile(File name)
void	logCloseFile(String path, org.apache.hadoop.hdfs.server.namenode.INodeFile newNode) Add close lease record to edit log.
void	logMkDir(String path, org.apache.hadoop.hdfs.server.namenode.INode newNode) Add create directory record to edit log
void	logOpenFile(String path, org.apache.hadoop.hdfs.server.namenode.INodeFileUnderConstruction newNode) Add open lease record to edit log.
void	logSync()
void	open() Create empty edit log files.

从类继承的方法 java.lang.Object

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

字段详细资料

LOG

public static final org.apache.commons.logging.Log LOG

方法详细资料

open

public void open()
          throws IOException

Create empty edit log files. Initialize the output stream for logging.

抛出:

IOException

createEditLogFile

public void createEditLogFile(File name)
                       throws IOException

抛出:

IOException

close

public void close()
           throws IOException

Shutdown the file store.

抛出:

IOException

logSync

public void logSync()
             throws IOException

抛出:

IOException

logOpenFile

public void logOpenFile(String path,
               org.apache.hadoop.hdfs.server.namenode.INodeFileUnderConstruction newNode)
                 throws IOException

Add open lease record to edit log. Records the block locations of the last block.

抛出:

IOException

logCloseFile

public void logCloseFile(String path,
                org.apache.hadoop.hdfs.server.namenode.INodeFile newNode)

Add close lease record to edit log.

logMkDir

public void logMkDir(String path,
            org.apache.hadoop.hdfs.server.namenode.INode newNode)

Add create directory record to edit log