From owner-freebsd-questions Mon May 20 19:31:48 1996 Return-Path: owner-questions Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id TAA13244 for questions-outgoing; Mon, 20 May 1996 19:31:48 -0700 (PDT) Received: from genesis.atrad.adelaide.edu.au (genesis.atrad.adelaide.edu.au [129.127.96.120]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id TAA13236; Mon, 20 May 1996 19:31:44 -0700 (PDT) Received: from msmith@localhost by genesis.atrad.adelaide.edu.au (8.6.12/8.6.9) id MAA24367; Tue, 21 May 1996 12:13:55 +0930 From: Michael Smith Message-Id: <199605210243.MAA24367@genesis.atrad.adelaide.edu.au> Subject: Re: To: jimd@mistery.mcafee.com (Jim Dennis) Date: Tue, 21 May 1996 12:13:55 +0930 (CST) Cc: gpalmer@freebsd.org, msmith@atrad.adelaide.edu.au, slagos@net1plus.com, questions@freebsd.org In-Reply-To: <199605210201.TAA06598@mistery.mcafee.com> from "Jim Dennis" at May 20, 96 07:01:21 pm MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-questions@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Jim Dennis stands accused of saying: > > I currently have two FreeBSD boxes mirrored as ftp sites. > I'm using DNS round-robin to balance the load. The question > has come up: "What happens if one of them goes down?" The connect to the first address should fail, and the client should move on to the next. This, unfortunately, depends on clients being implemented correctly (which is unlikely). > Write a script that polls the ftp/rr address on each of the > other machines in the ring periodically. If the poll fails > (past a set threshold) then IP alias the failed machine's port > to the local ether's interface. This will cause messy results due to ARP caching. > The idea is that machines in a round robin ring could > "cover" for one another using simple scripts and IP aliasing. > There's no kernels hacks, no dynamic DNS hacks, and no > applications layer hacks necessary. Cue terry to drop in and talk about server vs. service connections. 8) > Jim Dennis, -- ]] Mike Smith, Software Engineer msmith@atrad.adelaide.edu.au [[ ]] Genesis Software genesis@atrad.adelaide.edu.au [[ ]] High-speed data acquisition and (GSM mobile) 0411-222-496 [[ ]] realtime instrument control (ph/fax) +61-8-267-3039 [[ ]] Collector of old Unix hardware. "Where are your PEZ?" The Tick [[