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

[Mike Fedyk]

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?