Hi,

I was looking at the test cases for HDFS and found the following test
- org.apache.hadoop.hdfs.TestSetTimes.testTimes

>From the below, it appears that getAccessTime() for a directory should return 0.
Is this true?

      System.out.println("Creating testdir1 and testdir1/test1.dat.");
      Path dir1 = new Path("testdir1");
      Path file1 = new Path(dir1, "test1.dat");
      FSDataOutputStream stm = writeFile(fileSys, file1, replicas);
      FileStatus stat = fileSys.getFileStatus(file1);
      long atimeBeforeClose = stat.getAccessTime();
      String adate = dateForm.format(new Date(atimeBeforeClose));
      System.out.println("atime on " + file1 + " before close is " +
                         adate + " (" + atimeBeforeClose + ")");
      assertTrue(atimeBeforeClose != 0);
      stm.close();

<snip>

      //
      // record dir times
      //
      stat = fileSys.getFileStatus(dir1);
      long mdir1 = stat.getAccessTime();
      assertTrue(mdir1 == 0);

thanks
Vivek

      

Yes HDFS supports aTime only for files. Support for directories would be too
expensive.
Thanks,
--Konstantin

On Thu, Nov 11, 2010 at 12:44 AM, Vivekanand Vellanki <[EMAIL PROTECTED]>wrote:

> Hi,
>
> I was looking at the test cases for HDFS and found the following test
> - org.apache.hadoop.hdfs.TestSetTimes.testTimes
>
> From the below, it appears that getAccessTime() for a directory should
> return 0. Is this true?
>
>       System.out.println("Creating testdir1 and testdir1/test1.dat.");
>       Path dir1 = new Path("testdir1");
>       Path file1 = new Path(dir1, "test1.dat");
>       FSDataOutputStream stm = writeFile(fileSys, file1, replicas);
>       FileStatus stat = fileSys.getFileStatus(file1);
>       long atimeBeforeClose = stat.getAccessTime();
>       String adate = dateForm.format(new Date(atimeBeforeClose));
>       System.out.println("atime on " + file1 + " before close is " +
>                          adate + " (" + atimeBeforeClose + ")");
>       assertTrue(atimeBeforeClose != 0);
>       stm.close();
>
> <snip>
>
>       //
>       // record dir times
>       //
>       stat = fileSys.getFileStatus(dir1);
>       long mdir1 = stat.getAccessTime();
>       assertTrue(mdir1 == 0);
>
> thanks
> Vivek
>
>
>

Thanks for the prompt response.

________________________________
From: Konstantin Shvachko <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Sent: Thu, November 11, 2010 2:18:07 PM
Subject: Re: atime for a directory

Yes HDFS supports aTime only for files. Support for directories would be too
expensive.
Thanks,
--Konstantin
On Thu, Nov 11, 2010 at 12:44 AM, Vivekanand Vellanki <[EMAIL PROTECTED]> wrote:

Hi,
>
>
>I was looking at the test cases for HDFS and found the following test
>- org.apache.hadoop.hdfs.TestSetTimes.testTimes
>
>
>>From the below, it appears that getAccessTime() for a directory should return 0.
>Is this true?
>
>
>      System.out.println("Creating testdir1 and testdir1/test1.dat.");
>      Path dir1 = new Path("testdir1");
>      Path file1 = new Path(dir1, "test1.dat");
>      FSDataOutputStream stm = writeFile(fileSys, file1, replicas);
>      FileStatus stat = fileSys.getFileStatus(file1);
>      long atimeBeforeClose =  stat.getAccessTime();
>      String adate = dateForm.format(new Date(atimeBeforeClose));
>      System.out.println("atime on " + file1 + " before close is " +
>                         adate + " (" + atimeBeforeClose + ")");
>      assertTrue(atimeBeforeClose != 0);
>      stm.close();
>
>
><snip>
>
>
>      //
>      // record dir times
>      //
>      stat = fileSys.getFileStatus(dir1);
>      long mdir1 = stat.getAccessTime();
>      assertTrue(mdir1 == 0);
>
>
>thanks
>Vivek
>
>
>