Date: Wed, 25 Oct 1995 10:53:09 -0400 (EDT) From: "Jonathan M. Bresler" <jmb@kryten.Atinc.COM> To: "Jordan K. Hubbard" <jkh@time.cdrom.com> Cc: Ollivier Robert <roberto@keltia.freenix.fr>, gary@palmer.demon.co.uk, chat@freebsd.org Subject: Re: moving some mail. Message-ID: <Pine.3.89.9510251009.B9445-0100000@kryten.atinc.com> In-Reply-To: <27644.814631999@time.cdrom.com>
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On Wed, 25 Oct 1995, Jordan K. Hubbard wrote: > > Like Bill has said, it is the paradigm used Usenet. It works but it is much > > slower than mail (even with the timeouts). The vast majority of sites are > > three or four hops away from the other. Usenet can make it more then > > twenty... > > I think what *really* needs to happen is for sendmail to get a lot > smarter about this.. Sendmail knows who it can't reach, and if it > kept timing statistics for some number of "frequent destinations" then > it could even intuit who was slow and who was fast, reordering its > work queue accordingly. it is the USENET paradigm. it does not have some of the drawbacks of netnews. each person has to subscribe, we can filter particular individuals, we can limit the operation to three hops (freefall, regional mail hub, destination | MX'er) sendmail does not do what we want in this regard. reordering the queue will not decrease the number of sendmail processes (someone still has to shovel to those sites). perhaps regional mail hubs is bogus and two parallel lists is more appropriate--the fast lane and the slow--this will bugger everyone in europe and does not decrease the mail load on freefall. regional hubs, say one in germany, would deliver to everyone in germany (barring strange topologies) with only one message passing from freefall to the german mail hub. that one message would then get exploded out to chris kuku, stephan esser, and everyone else associate with that regional mail hub. (association between mail hub and subscriber kept on freefall. consulted by majordomo when creating the mail envelope. have bulk_mailer to a lookup on the subscriber in the association file. use the result to create the mail envelope.) Jonathan M. Bresler jmb@kryten.atinc.com | Analysis & Technology, Inc. FreeBSD Postmaster jmb@FreeBSD.Org | 2341 Jeff Davis Hwy play go. | Arlington, VA 22202 ride bike. hack FreeBSD.--ah the good life | 703-418-2800 x346
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