From owner-freebsd-current Tue Jun 1 13:22:54 1999 Delivered-To: freebsd-current@freebsd.org Received: from luna.lyris.net (luna.shelby.com [207.90.155.6]) by hub.freebsd.org (Postfix) with ESMTP id 3E68B155BD; Tue, 1 Jun 1999 13:22:46 -0700 (PDT) (envelope-from kip@lyris.com) Received: from luna.shelby.com by luna.lyris.net (8.9.1b+Sun/SMI-SVR4) id NAA06709; Tue, 1 Jun 1999 13:16:26 -0700 (PDT) Received: from (luna.shelby.com [207.90.155.6]) by luna.shelby.com with SMTP (MailShield v1.50); Tue, 01 Jun 1999 13:16:26 -0700 Date: Tue, 1 Jun 1999 13:16:26 -0700 (PDT) From: X-Sender: kip@luna To: Matthew Hunt Cc: Nate Williams , Poul-Henning Kamp , current@FreeBSD.ORG Subject: Re: net.inet.tcp.always_keepalive on as default ? In-Reply-To: <19990601130331.A21176@wopr.caltech.edu> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SMTP-HELO: luna X-SMTP-MAIL-FROM: kip@lyris.com X-SMTP-RCPT-TO: mph@astro.caltech.edu,nate@mt.sri.com,phk@FreeBSD.ORG,current@FreeBSD.ORG X-SMTP-PEER-INFO: luna.shelby.com [207.90.155.6] Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG That is a much more genuine concern than bandwidth. Applications should decide for themselves whether or not to use keepalives. -Kip On Tue, 1 Jun 1999, Matthew Hunt wrote: > On Tue, Jun 01, 1999 at 12:40:34PM -0700, kip@lyris.com wrote: > > > declared dead. I think it somewhat silly to say that this is consuming a > > lot of bandwidth. The average mail message (4k) is 4 packets, the average > > The other issue is that you don't necessarily want the TCP connection > to close just because you lose connectivity for a few hours. If we > send keepalives by default, might that not surprise users who don't > expect it? > > I'm thinking of long-lived connections like telnet and ssh; if you're > doing work over such a connection, it would be nice if the connection > endured an outage while you're away sleeping, like it does without > keepalives. > > -- > Matthew Hunt * UNIX is a lever for the > http://www.pobox.com/~mph/ * intellect. -J.R. Mashey > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-current" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message