Re: tuning ext2 or ReiserFS to avoid fragmentation with large files?

From: Mike Fedyk (mfedyk@matchmail.com)
Date: Tue Dec 04 2001 - 23:40:19 EST


On Wed, Dec 05, 2001 at 03:17:17AM +0100, Rasmus B?g Hansen wrote:
> On Tue, 4 Dec 2001, Erik Tews wrote:
>
> > If I remember right xfs has got a online-defragmentation utility. So
> > have a look at xfs.
> >
> > I think xfs works different from reiserfs and ext2 when writing files to
> > disk which helps avoiding fragmentation. This feature is called
> > allocation groups.
>
> I *might* be wrong, but isn't the allocation-group thing exactly what
> ext2/ext3 does?
>

Basically, yes. They both have the name "group" in some of their feature
lists. What really matters is *what* they encompass, and *how* they're used.

Can someone in the know comment about the similarity of the ext[23] and xfs
groups?
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