Date: Thu, 6 Mar 2003 22:50:04 +0000 From: David Dooley <dpd@raffles-it.com> To: "Aaron Burke" <aburke@nullplusone.com> Cc: freebsd-questions-local@be-well.no-ip.com, freebsd-questions@FreeBSD.ORG Subject: Re: Mirroring/load-balance two servers Message-ID: <20030306225004.7b954fdc.dpd@raffles-it.com> In-Reply-To: <AMEMKJNMFLJCJDLFIEDBGEDJCKAA.aburke@nullplusone.com> References: <44k7fcz32q.fsf@be-well.ilk.org> <AMEMKJNMFLJCJDLFIEDBGEDJCKAA.aburke@nullplusone.com>
next in thread | previous in thread | raw e-mail | index | archive | help
--LmRy_et_q=.N_4rD Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit The only problem with using DNS round robin like this, is that, in this scenario when 1 server is down, on average 1 in 3 requests to the web server will fail. But as previous posters have commented DNS should respond with the same 3 addresses, but it will rotate the order each time, in the version ( named 8.3.4-REL Sun Feb 9 01:23:18 GMT 2003 on 4.7-STABLE of the same date ) I am using it appears to return the addresses in some sort of random order at least it does for me in my test. On Thu, 6 Mar 2003 12:09:06 -0800 "Aaron Burke" <aburke@nullplusone.com> wrote: > > "Aaron Burke" <aburke@nullplusone.com> writes: > > > > > To my knowlege, yes. Lets say you had a server called www. > > > You would just give it two addresses in your domain configuration > > > files. > > > > > > www IN CNAME 12.34.56.78 > > > www IN CNAME 9.10.11.12 > > > www IN CNAME 65.4.3.21 > > > > That should be A records, not CNAMEs. > Err, you are correct, my mistake. > > > > > > The DNS standard will give out a different address for every > > > query. To get the address 12.34.56.78 twice, you would have > > > to make 4 unique queries for the server records. > > > > Where does the standard say that? Most servers will return the > > records in the same order each time by default, and my reading of the > > standards is that this is perfectly acceptable behaviour. > > I have personally not read the standard. It is just information > thats been given to me by some knowlegable friends. > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message > -- David Dooley dpd@raffles-it.com --LmRy_et_q=.N_4rD Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (FreeBSD) iD8DBQE+Z9CgiTCzTVFwd6wRAqcgAKDoFTVBFAhadANLzlKfd+XGfLV80gCggTwz P5Nf3fU6FpvqWa7UN1OTW2s= =L76b -----END PGP SIGNATURE----- --LmRy_et_q=.N_4rD-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030306225004.7b954fdc.dpd>