Defrag

[James Mcphee]

AIX's jfs still requires defragging.  And it has a registry, <ahem> I mean
ODM.  But it's technically a unix!  The best of both worlds!

On Mon, Sep 20, 2010 at 10:21 AM, Eric - A <ericallen3 at juno.com> wrote:

> I had a look at the "Disk Usage Analyzer" and the hard disk looks fine. I
> am just used to DOS and defragging every month. Old habits are hard to
> break.
>
>
> .
> Eric - A
> .
>
>
> ---------- Original Message ----------
> From: Eric Shubert <ejs at shubes.net>
> To: plug-discuss at lists.plug.phoenix.az.us
> Subject: Re: Defrag
> Date: Mon, 20 Sep 2010 09:11:42 -0700
>
> Bryan O'Neal wrote:
> > Many of you know my feelings on file fragmentation in linux. However
> > Keven is correct that EXT4 is the only approved way to gain defrag
> > functionality short of cleaning the drive and moving your files back
> > in starting with the largest and most frequently accessed files.
>
> I presume by "defrag functionality" Bryan's talking generally about
> filesystem optimization. Defrag is but one aspect of filesystem
> optimization.
>
> Indeed, defrag of ext3 doesn't seem to be as much of a concern as with
> FAT or NTFS. One way to defrag ext3 is to boot from a live CD, tar
> everything off to an external device, reformat the filesystem (or remove
> everything, but I thing reformatting might be faster), and tar
> everything back.
>
> As Bryan hinted, if you could arrange the files in the tarball by
> frequency of use, that would provide an additional level of optimization.
>
> There are a few other things you can do to improve ext3 performance. The
> noatime mount option will reduce the writes required to the device.
> There are also a few settings you can tweak with the tune2fs utility
> that can improve performance, such as dir_index, which is useful if you
> have any directories with a large number of files.
>
> Of course, have a look at ext4 for the latest developments in this area.
> I haven't looked at ext4 in detail yet.
> --
> -Eric 'shubes'
>
> > On Sun, Sep 19, 2010 at 1:21 PM, Kevin Faulkner
> > <kondor6c at encryptedforest.net> wrote:
> >> On Sunday 19 September 2010 07:19:05 Eric - A wrote:
> >>> Hi All,  I was wondering if I could defrag my hard drive under ubuntu
> 10.04
> >>> ?
> >>>
> >> ext4 does have online defragmentation, however I don't think it is
> available
> >> for Ubuntu.
> >>
> https://ext4.wiki.kernel.org/index.php/Ext4_Howto#Online_defragmentation
> >>
> >>> .
> >>> Eric - A
> >>> .
> >>>
> >>>
> >>>
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-- 
James McPhee
jmcphe at gmail.com
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