Messages in this thread | | | Date | Mon, 11 Jan 1999 15:27:42 +0000 (GMT) | From | Matthew Kirkwood <> | Subject | Re: linux-kernel's extremely slow turnaround time |
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On Sun, 10 Jan 1999, Michael H. Warfield wrote:
> > What's limiting it? CPU? Disk? Sendmail waiting for slow mail hosts on > > the other end? > > Having run a mailing list with several thousand subcribers on it, > I would place my money on sendmail. When the NTSecurity mailing list > topped 2,000 subscribers, the list latency was exceeding a day or more > depending on slow hosts. The problem is that, for a given message, sendmail > will only deliver to one address at a time and go sequentially through > that list.
vger runs vmailer. And, I believe, less than half of the exploders run sendwhale.
> On my one list engine at ISS, we now use QMail for delivery. I > personally think that Dan Bernstein's claims about security and QMail are > way over hyped and I've seen it commit enough random acts of terrorism not > to trust it exposed to the outside world, but it does deliver mail at least > and order or two fast than sendmail for extremely large receipient lists. > I saw hour latency through the list drop from days to hours.
We use qmail to explode vger, and apart from the numbers in /proc/net/dev increasing a bit quicker than usual we haven't noticed significant load increases at all.
The short-term solution is more exploders (although I suspect that there are only one or two significant domains remaining).
The longer-term solution is a fast, majordomo-compatible distributed list server.
Matthew.
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