linux-kernel - Re: [PATCH 0/7] OMFS filesystem version 3

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Message-Id: <E1JlJE6-0004yZ-62@pomaz-ex.szeredi.hu>
Date:	Mon, 14 Apr 2008 09:35:42 +0200
From:	Miklos Szeredi <miklos@...redi.hu>
To:	me@...copeland.com
CC:	miklos@...redi.hu, hch@...radead.org, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [PATCH 0/7] OMFS filesystem version 3

> > I don't feel strongly either way, and Christoph's arguments against
> > fuse are mostly valid (although neither of them are serious).
> 
> I don't have hard numbers, but anecdotally my FUSE version is quite 
> a bit less performant.  That's no criticism of FUSE - I just haven't
> put the time into optimizing and adding various caches.

The worst I/O performance problems should be gone by 2.6.26.
Otherwise there shouldn't be a need to add optimizations to the
userspace code.  The kernel caches take care of that, just like for a
kernel filesystem.

> > There's one thing which makes fuse a slightly better candidate for
> > applications where the number of users is low: stability.  Unless you
> > or your users test the hell out of your filesystem, there always a
> > chance that some bugs will remain.  
> 
> Sure, though this FS won't see the same kind of use as ext2.  Most users
> would just mount it, copy a bunch of files, then unmount it, and if that
> works then great.

Exactly.  Which means, that bugs which happen only in special
circumstances don't surface early and cause more headaches later.

Miklos
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