On 6 Sep 2012, at 10:21, Nigel Metheringham <nigel@???>
wrote:
> Exim puts mail through an on-disk queue, and, obeying the appropriate
> RFCs, takes great care to make sure that received mail is committed to
> stable storage before acknowledging receipt or attempting further
> delivery - this tends to require round trips, not just to the disk
> controller, but right down to the spinning rust, so will limit
> performance, whilst enhancing reliability.
Of course SSDs, flash storage, and ram disks are also available. Using them will improve performance. RAM disks, though, will risk message loss.
--
Ian Eiloart
Postmaster, University of Sussex
+44 (0) 1273 87-3148
