Re: File system fragmentation

From: Mark Haney (mhaney_at_interactsys.com)
Date: 10/08/04

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    To: For users of Fedora Core releases <fedora-list@redhat.com>
Date: Fri, 08 Oct 2004 09:55:24 -0400

    On Fri, 2004-10-08 at 09:45, Douglas Furlong wrote:
    > On Fri, 2004-10-08 at 09:25 -0400, Mark Haney wrote:
    > > On Fri, 2004-10-08 at 09:14, Douglas Furlong wrote:
    > > > On Fri, 2004-10-08 at 09:08 -0400, Mark Haney wrote:
    > > > > What's the story with ext3 file fragmentation?
    > >
    > > > >From what I can tell of previous conversations, the fragmentation is
    > > > heavily dependant on free disk space.
    > > >
    > > > The less space available to the kernel when storing data, the higher the
    > > > level of fragmentation.
    > >
    > > >
    > > > You can use filefrag to work out how fragmented a file is, which is
    > > > handy for large files, no so handy for lots and lots of small files.
    > > >
    > > > May be not what you were after, but I hope it helps a bit.
    > > >
    > > > --
    > > > Douglas Furlong
    > > Yeah, it's a start. I pretty much figured it was going to be the same
    > > story as any other file system. I push my systems hard. And I have
    > > lots of small files which doesn't really help.
    > >
    > > Now, can anyone tell me if a defragmenter would help for ext3? Or not?
    > > It helps a ton with NTFS, but would the same thing happen to a linux fs?
    > I don't know if there IS a defragmenter for linux, I know man -k doesn't
    > provide any new information for defrag or any thing similar.
    >
    > EXT3 (essentially EXT2 for this purpose) deals with fragmentation is a
    > much smarter way then NTFS and FAT, but if you leave no space on your
    > disks there isn't THAT much it can do.
    >
    > Can you not try and free up space?

    I have plenty of space left on the partition (15GB or so out of 30GB)
    but I noticed that Evolution takes a while (a couple seconds I mean it's
    not a huge difference, but I am noticing it) and began to wonder if a
    defrag would help. As I said in another post, I'm beginning to dig into
    linux file systems a bit deeper and it was beginning to nag me that I
    didn't know something. I hate that.

    Thanks for all the help.

    >
    > --
    > Douglas Furlong
    > Systems Administrator
    > Firebox.com
    > T: 0870 420 4475 F: 0870 220 2178

    --------------------------------------
    Mark Haney
    Network Administrator
    InterAct Public Safety Systems
    mhaney@interactsys.com
    Fedora Core release 2 (Tettnang) Kernel: 2.6.8-1.521 GNU/Linux
    09:53:03 up 2:11, 2 users, load average: 9.02, 8.74, 7.88 

    


    


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