org.apache.hadoop.fs
Class DF

java.lang.Object
  org.apache.hadoop.util.Shell
      org.apache.hadoop.fs.DF

public class DF
extends Shell

Filesystem disk space usage statistics. Uses the unix 'df' program. Tested on Linux, FreeBSD, Cygwin.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.hadoop.util.Shell

Shell.ExitCodeException, Shell.ShellCommandExecutor

Field Summary

static long

DF_INTERVAL_DEFAULT

Fields inherited from class org.apache.hadoop.util.Shell

LOG, SET_GROUP_COMMAND, SET_OWNER_COMMAND, SET_PERMISSION_COMMAND, USER_NAME_COMMAND, WINDOWS

Constructor Summary

DF(File path, Configuration conf)

DF(File path, long dfInterval)

Method Summary

long	getAvailable()
long	getCapacity()
String	getDirPath()
protected String[]	getExecString() return an array containing the command name & its parameters
String	getFilesystem()
String	getMount()
int	getPercentUsed()
long	getUsed()
static void	main(String[] args)
protected void	parseExecResult(BufferedReader lines) Parse the execution result
String	toString()

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

execCommand, getExitCode, getGET_PERMISSION_COMMAND, getGROUPS_COMMAND, getProcess, getUlimitMemoryCommand, run, setEnvironment, setWorkingDirectory

Methods inherited from class java.lang.Object

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

Field Detail

DF_INTERVAL_DEFAULT

public static final long DF_INTERVAL_DEFAULT

See Also:

Constant Field Values

Constructor Detail

DF

public DF(File path,
          Configuration conf)
   throws IOException

Throws:

IOException

DF

public DF(File path,
          long dfInterval)
   throws IOException

Throws:

IOException

Method Detail

getDirPath

public String getDirPath()

getFilesystem

public String getFilesystem()
                     throws IOException

Throws:

IOException

getCapacity

public long getCapacity()
                 throws IOException

Throws:

IOException

getUsed

public long getUsed()
             throws IOException

Throws:

IOException

getAvailable

public long getAvailable()
                  throws IOException

Throws:

IOException

getPercentUsed

public int getPercentUsed()
                   throws IOException

Throws:

IOException

getMount

public String getMount()
                throws IOException

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object

getExecString

protected String[] getExecString()

Description copied from class: Shell

return an array containing the command name & its parameters

Specified by:

getExecString in class Shell

parseExecResult

protected void parseExecResult(BufferedReader lines)
                        throws IOException

Description copied from class: Shell

Parse the execution result

Specified by:

parseExecResult in class Shell

Throws:

IOException

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception