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Re: to compare journalised file systems

To: linux-xfs@xxxxxxxxxxx
Subject: Re: to compare journalised file systems
From: Ethan Benson <erbenson@xxxxxxxxxx>
Date: Wed, 16 Oct 2002 13:50:43 -0800
In-reply-to: <20021016232652.A14553@wotan.suse.de>
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On Wed, Oct 16, 2002 at 11:26:52PM +0200, Andi Kleen wrote:
> On Wed, Oct 16, 2002 at 12:38:53PM -0800, Ethan Benson wrote:
> > On Wed, Oct 16, 2002 at 05:50:47AM -0400, TJ Easter wrote:
> > > Anyone know if there are plans to impliment the immutable/append-only
> > > options?
> > 
> > a couple monthes ago Steve said it looked like it would be pretty easy
> > to do, and without breaking backward compatibilty (since older
> > implementations would simply ignore the bits).  he just doesn't really
> > have time, someone with a little experience in the XFS code could
> > probably do it though.
> > 
> > immutable, append-only, and the S (sync) bits would be the useful ones.
> 
> 'D' for directories is quite useful too, because some mail servers
> assume that everybody has synchronous rename() like traditional BSD FFS.

your thinking S which can be applied to both files and directories.  

there is no chattr +D at least in my version of it.

> 'd' (don't dump) should be also simple and useful.

xfs already honors an extended attribute for files only, the
maintainers believe that honoring such a thing for directories is evil.

> and of course 'u' if it was implemented (probably a bit more work) 
> would clear a major FAQ item on this list.

not even ext2 supports u.

-- 
Ethan Benson
http://www.alaska.net/~erbenson/

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