From owner-freebsd-hackers Thu Jun 29 05:58:33 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id FAA23489 for hackers-outgoing; Thu, 29 Jun 1995 05:58:33 -0700 Received: from hutcs.cs.hut.fi (root@hutcs.cs.hut.fi [130.233.192.2]) by freefall.cdrom.com (8.6.10/8.6.6) with SMTP id FAA23464 for ; Thu, 29 Jun 1995 05:57:48 -0700 Received: from shadows.cs.hut.fi by hutcs.cs.hut.fi with SMTP id AA16069 (5.65c8/HUTCS-S 1.4 for ); Thu, 29 Jun 1995 15:57:08 +0300 From: Heikki Suonsivu Received: (hsu@localhost) by shadows.cs.hut.fi (8.6.10/8.6.10) id PAA00901; Thu, 29 Jun 1995 15:57:07 +0300 Date: Thu, 29 Jun 1995 15:57:07 +0300 Message-Id: <199506291257.PAA00901@shadows.cs.hut.fi> To: "Rodney W. Grimes" Cc: freebsd-hackers@freefall.cdrom.com In-Reply-To: "Rodney W. Grimes"'s message of 23 Jun 1995 05:02:59 +0300 Subject: Re: FreeBSD as a router Organization: Helsinki University of Technology, Otaniemi, Finland Sender: hackers-owner@FreeBSD.org Precedence: bulk From: "Rodney W. Grimes" > A bit of extra delay shouldn't affect throughput, especially with TCP large > window support, or does it? It won't effect long TCP streams, but it sure as heck raises cane with UDP traffic (NFS for example) which has no window and must wait for round trip times for packet acks. Not doing windowing or similar technique means broken protocol, if it is supposed to give high bandwidth on anything but a local network. And at least to me it would seem stupid to design protocols which are supposed to work reasonably in local networks only. The more so as network speeds increase. NFS is an example of a bad design. As what comes to latency, I can't see any considerable difference in delays between ciscos and FreeBSD routers (both seem to add about 1ms per router). In comparison, over atlantic 1ms per router would make about 1% of the delay, all the rest being light of speed and the phase of the moon. Not much to be done by latency improvements? -- Heikki Suonsivu, T{ysikuu 10 C 83/02210 Espoo/FINLAND, hsu@cs.hut.fi home +358-0-8031121 work -4513377 fax -4555276 riippu SN