On Sunday 02 March 2003 05:57 pm, Mark Weaver wrote:
> Todd Lyons wrote:
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > David E. Fox wrote on Tue, Feb 25, 2003 at 09:55:25PM -0800 :
> >>>Reiserfs should never be defragged--the elaborate tree structure it
> >>>sets up is
> >>
> >>I once heard that fragmentation is impossible in reiserfs.
> >
> > No, not impossible.  Things like /var/log/* will always fragment unless
> > there is only one file that ever gets written to.  However, the design
> > of the fs and how it accesses both its meta data (ie directories and
> > file entries) and file data will determine the response, especially
> > under heavy io load.
>
> but I thought there wasn't any such thing as needing to defrag a linux
> system? has something changed that I wasn't aware of?

Things like the log files, weven if fragmented don't impact performance.  
Userspace data files still rarely get fragmented at any level that impacts 
performance, so no defrag necessary.
-- 
Greg

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