QMail and SoftUpdates

[Julian Elischer]

On Tue, 18 May 2004, Don Lewis wrote:

> On 18 May, Julian Elischer wrote:
> > 
> > 
[...]

> > 
> > An fsync will sync ALL directory entries pointing to the file
> 
> I haven't looked at how qmail works, but my suspicion is that it
> fsync()s the file and then creates a link (and probably unlinks the old
> name) to mark the queue file as valid and is not partially written. I
> think this would work with softupdates if the file were fsync()ed again
> after the link() call.  I won't comment about why this change is
> unlikely to make it into the code.

a single fsync AFTER the link 
but before acking the mail would be sufficient.