Re: Is ReiserFS really a journaling file system, or is it really just a synchronous-metadata file system like BSD FFS?

From: H. Peter Anvin (hpa@transmeta.com)
Date: Tue Mar 28 2000 - 21:00:33 EST


Followup to: <20000329012048.D18134@redhat.com>
By author: "Stephen C. Tweedie" <sct@redhat.com>
In newsgroup: linux.dev.kernel
>
> Hi,
>
> On Mon, Mar 27, 2000 at 08:47:14PM -0800, ncm@nospam.cantrip.org wrote:
>
> > I hope my impression is wrong, and that in fact all these file systems
> > provide similar recovery semantics. Can someone answer authoritatively?
>
> They all do. You cannot do data journaling unless the applications
> give the operating system hints about their transactions. Existing
> applications typically use fsync() and O_SYNC when they want to
> tell the OS about data write ordering constraints, and journaling
> filesystems do honour those hints properly.
>

Okay, I do have a question. There are a *number* of applications in
which it is far better to lose a file than having a file which looks
correct but contains bad data. kernel.org is such as application.
What would be the proper kind of filesystem to run?

     -hpa

-- 
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."

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