Package org.apache.hadoop.hdfs.tools.offlineImageViewer

Class NameDistributionVisitor

java.lang.Object

org.apache.hadoop.hdfs.tools.offlineImageViewer.NameDistributionVisitor

@Private
public class NameDistributionVisitor
extends Object

File name distribution visitor.

It analyzes file names in fsimage and prints the following information:

• Number of unique file names
• Number file names and the corresponding number range of files that use these same names
• Heap saved if the file name objects are reused

Constructor Summary

Constructors

Constructor	Description
NameDistributionVisitor(String filename, boolean printToScreen)

Method Summary

Modifier and Type	Method	Description
protected void	write(String toWrite)	Write parameter to output file (and possibly screen).

Methods inherited from class java.lang.Object

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

Constructor Details

NameDistributionVisitor

public NameDistributionVisitor(String filename,
 boolean printToScreen)
                        throws IOException

Throws:

IOException

Method Details

write

protected void write(String toWrite)
              throws IOException

Write parameter to output file (and possibly screen).

Parameters:

toWrite - Text to write to file

Throws:

IOException