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java.lang.Object org.apache.hadoop.util.Shell org.apache.hadoop.fs.DU
public class DU
Filesystem disk space usage statistics. Uses the unix 'du' program
Nested Class Summary |
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Nested classes/interfaces inherited from class org.apache.hadoop.util.Shell |
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Shell.ExitCodeException, Shell.ShellCommandExecutor |
Field Summary |
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Fields inherited from class org.apache.hadoop.util.Shell |
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LOG, SET_GROUP_COMMAND, SET_OWNER_COMMAND, SET_PERMISSION_COMMAND, timeOutInterval, ULIMIT_COMMAND, USER_NAME_COMMAND, WINDOWS |
Constructor Summary | |
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DU(File path,
Configuration conf)
Keeps track of disk usage. |
|
DU(File path,
long interval)
Keeps track of disk usage. |
Method Summary | |
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void |
decDfsUsed(long value)
Decrease how much disk space we use. |
String |
getDirPath()
|
protected String[] |
getExecString()
return an array containing the command name & its parameters |
long |
getUsed()
|
void |
incDfsUsed(long value)
Increase how much disk space we use. |
static void |
main(String[] args)
|
protected void |
parseExecResult(BufferedReader lines)
Parse the execution result |
void |
shutdown()
Shut down the refreshing thread. |
void |
start()
Start the disk usage checking thread. |
String |
toString()
|
Methods inherited from class org.apache.hadoop.util.Shell |
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execCommand, execCommand, execCommand, getExitCode, getGET_PERMISSION_COMMAND, getGroupsCommand, getGroupsForUserCommand, getProcess, getUlimitMemoryCommand, getUlimitMemoryCommand, getUsersForNetgroupCommand, isTimedOut, run, setEnvironment, setWorkingDirectory |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public DU(File path, long interval) throws IOException
path
- the path to check disk usage ininterval
- refresh the disk usage at this interval
IOException
- if we fail to refresh the disk usagepublic DU(File path, Configuration conf) throws IOException
path
- the path to check disk usage inconf
- configuration object
IOException
- if we fail to refresh the disk usageMethod Detail |
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public void decDfsUsed(long value)
value
- decrease by this valuepublic void incDfsUsed(long value)
value
- increase by this valuepublic long getUsed() throws IOException
IOException
- if the shell command failspublic String getDirPath()
public void start()
public void shutdown()
public String toString()
toString
in class Object
protected String[] getExecString()
Shell
getExecString
in class Shell
protected void parseExecResult(BufferedReader lines) throws IOException
Shell
parseExecResult
in class Shell
IOException
public static void main(String[] args) throws Exception
Exception
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