Re: ext3-2.4-0.9.4

From: Rik van Riel (
Date: Mon Jul 30 2001 - 11:27:57 EST

On 30 Jul 2001, Patrick J. LoPresti wrote:

> The relevant standards (POSIX, SuS, etc.) provide no way to perform
> reliable transactions on a file system.
> BSD provides one solution, which is synchronous metatdata. (I am
> assuming modern BSDs already deal with the multiple-disk-block
> problem to make these transactions properly atomic. Is this
> assumption false?)
> Linux provides a different solution, which is fsync() on the
> directory.
> All MTAs, and other apps besides, currently use the BSD solution for
> reliable transactions.
> Is it really so absurd to ask Linux to provide efficient support of
> the BSD semantics as an option?

Yes. You could fix this issue in userland very easily,
it might even work with an LD_PRELOAD ...

Besides BSD softupdates and the various journaling
filesystems which are in use on other Unixen also
don't provide the 4.3BSD solution any more ...



Virtual memory is like a game you can't win;
However, without VM there's truly nothing to lose...

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This archive was generated by hypermail 2b29 : Tue Jul 31 2001 - 21:00:44 EST