Andreas,

Journalling slows everything down because it requires all writes (and reads)
to be serialized.  This decreases SMP parallelism.  The last thing Linux
needs is another slow SMP poor component.  I think more is better, don't get
me wrong.  I jsut didn't like seeing some folks go belly up and start
killing their internal projects (like ext3) just becuase XFS shows up on the
scene.  Particularly since it was a patently blatant predatory move by SGI
based on pure politics -- so obvious.  It's also just another unix file
system, and comes with all the limitations of Unix FS's.

Jeff


----- Original Message -----
From: Andreas Bogk <andreas@andreas.org>
To: Jeff Merkey <jmerkey@timpanogas.com>
Cc: <mcai7et2@stud.umist.ac.uk>; <linux-kernel@vger.rutgers.edu>
Sent: Monday, May 24, 1999 8:57 AM
Subject: Re: XFS and journalling filesystems


> "Jeff Merkey" <jmerkey@timpanogas.com> writes:
>
> > much of it they are really going to give you.  Another Unix File system
> > (yawn yawn yawn) with journalling (which means it will be **SLOW**).  I
> > would vote for the ext3 project to continue.  It appears they were
reacting
>
> I'm using Linux for video applications. XFS has a very important
> feature for video: guaranteed bandwidth. Also, journalling slows down
> reading, but speeds up writing, which is again important for
> video. So, as long as ext3 is not there, I'll be very happy about XFS.
>
> Andreas
>
> --
> Reality is two's complement. See:
> ftp://ftp.netcom.com/pub/hb/hbaker/hakmem/hacks.html#item154
>


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