Date: 6 Mar 1996 23:00:35 GMT
Message-ID: <19960306230035.15369.qmail@koobera.math.uic.edu>
From: djb@koobera.math.uic.edu (D. J. Bernstein)
To: drums@cs.utk.edu
Subject: Re: re PIPELINING

> Bernstein's algorithm is intended to improve real-time latency with sendmail's
> type of queueing strategy.

Bullshit. If you had even glanced at qmail you would be aware that its
queueing strategy is very different from sendmail's.

In particular, qmail does not ``delay the easy cases because of ... the
hard cases.'' Messages are handled independently. The only reason qmail
ever delays is to obey the concurrency limit imposed by the sysadmin.

> Nor does it scale;

Bullshit. It scales just fine.

> I recommend that we make the observation that using a single-threaded FIFO
> queue in a mailer leads to performance problems, and move on.

``FIFO queue'' is redundant. ``Single-threaded queue'' is meaningless.
And it's counterproductive to call a particular level of performance a
``problem'' if you don't suggest a way to do better.

I (obviously) have no objection to the existing ``multiple concurrent
outgoing mail transactions'' paragraph.

---Dan