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Thread: How view files by last accessed?

  1. #1

    Default How view files by last accessed?

    Is there a way (I'm on kde) to view files (hopefully in dolphin but I'll take anything) by the date at which they were last accessed?

  2. #2
    Join Date
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    Default Re: How view files by last accessed?

    There does not appear to be. At least on KDE 4.3.5 there is no option to show a column for that time stamp that I can find.

  3. #3
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    Default Re: How view files by last accessed?

    Also some people (like me) mount filesystems with noatime which doesn't update the atime stamp to improve performance. Atime was mentioned as a design flaw in Unix, each read of a file causing a write. Very few apps actually need atime. The overhead can be mitigated somewhat with relatime, and of course buffering helps.

  4. #4

    Default Re: How view files by last accessed?

    Quote Originally Posted by ken_yap View Post
    Also some people (like me) mount filesystems with noatime which doesn't update the atime stamp to improve performance. Atime was mentioned as a design flaw in Unix, each read of a file causing a write. Very few apps actually need atime. The overhead can be mitigated somewhat with relatime, and of course buffering helps.
    Interesting. So if I turn off atime (I assume I can do this for the harddrive/basic opensuse system) would I notice a performance imporvement? Are there any issues from that?

  5. #5
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    Default Re: How view files by last accessed?

    It would depend on you usage pattern. If you run a database that may have many accesses per second It would make a difference. If you are only opening documents probably not.

  6. #6
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    Default Re: How view files by last accessed?

    Maybe View>Sort By>Date. Be sure to tick Descending as well. It worked for me.
    ______________________________________________________________________________________
    Don't ask "if" something can be done, for it can always be done. Rather instead ask "How" can it be done.

  7. #7

    Default Re: How view files by last accessed?

    Quote Originally Posted by Jonathan_R View Post
    Maybe View>Sort By>Date. Be sure to tick Descending as well. It worked for me.
    That's last created not last accessed.

  8. #8
    Carlos E. R. NNTP User

    Default Re: How view files by last accessed?

    On Thu, 01 Jul 2010 17:26:04 GMT
    6tr6tr <> wrote:

    >
    > ken_yap;2183170 Wrote:
    > > Also some people (like me) mount filesystems with noatime which
    > > doesn't update the atime stamp to improve performance. Atime was
    > > mentioned as a design flaw in Unix, each read of a file causing a
    > > write. Very few apps actually need atime. The overhead can be
    > > mitigated somewhat with relatime, and of course buffering helps.

    >
    > Interesting. So if I turn off atime (I assume I can do this for the
    > harddrive/basic opensuse system)


    No, it is done for each individual mount point in the /etc/fstab file.

    > would I notice a performance
    > imporvement?


    There are improvements, but not everybody _notices_ them.

    > Are there any issues from that?


    The only program I know which uses this feature is "mutt". But there
    can be more: an administrator somewhere might need to know when a file
    was last read before considering eliminating it or moving it to an
    alternative (slower, longer term) storage.


    An alternative to "noatime" is "relatime", the impact is smaller if you
    are worried. "man 8 mount" explains it:

    relatime

    Update inode access times relative to modify or change
    time. Access time is only updated if the previous access time
    was earlier than the current modify or change time. (Similar
    to noatime, but doesn't break mutt or other applications that
    need to know if a file has been read since the last time it was
    modified.)

    --
    Cheers / Saludos,

    Carlos E. R.
    (from 11.2 x86_64 "Emerald" GM (Minas Tirith))


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