From owner-freebsd-questions@FreeBSD.ORG Wed Dec 28 17:52:25 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7F049106564A for ; Wed, 28 Dec 2011 17:52:25 +0000 (UTC) (envelope-from vas@mpeks.tomsk.su) Received: from relay2.tomsk.ru (relay2.tomsk.ru [212.73.124.8]) by mx1.freebsd.org (Postfix) with ESMTP id C7C898FC16 for ; Wed, 28 Dec 2011 17:52:24 +0000 (UTC) X-Virus-Scanned: by clamd daemon 0.93.1 for FreeBSD at relay2.tomsk.ru Received: from admin.sibptus.tomsk.ru (account sudakov@sibptus.tomsk.ru [212.73.125.240] verified) by relay2.tomsk.ru (CommuniGate Pro SMTP 5.1.13) with ESMTPSA id 22942899 for freebsd-questions@freebsd.org; Thu, 29 Dec 2011 00:52:22 +0700 Received: from admin.sibptus.tomsk.ru (sudakov@localhost [127.0.0.1]) by admin.sibptus.tomsk.ru (8.14.5/8.14.5) with ESMTP id pBSHqLhL027339 for ; Thu, 29 Dec 2011 00:52:22 +0700 (NOVT) (envelope-from vas@mpeks.tomsk.su) Received: (from sudakov@localhost) by admin.sibptus.tomsk.ru (8.14.5/8.14.5/Submit) id pBSHqLch027338 for freebsd-questions@freebsd.org; Thu, 29 Dec 2011 00:52:21 +0700 (NOVT) (envelope-from vas@mpeks.tomsk.su) X-Authentication-Warning: admin.sibptus.tomsk.ru: sudakov set sender to vas@mpeks.tomsk.su using -f Date: Thu, 29 Dec 2011 00:52:21 +0700 From: Victor Sudakov To: freebsd-questions@freebsd.org Message-ID: <20111228175221.GA27286@admin.sibptus.tomsk.ru> References: <20111228075422.GA18064@admin.sibptus.tomsk.ru> <4EFAE80D.9040900@my.gd> <20111228130734.GA23763@admin.sibptus.tomsk.ru> <4EFB1B4F.2090504@my.gd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4EFB1B4F.2090504@my.gd> Organization: AO "Svyaztransneft", SibPTUS X-PGP-Key: http://www.livejournal.com/pubkey.bml?user=victor_sudakov X-PGP-Fingerprint: 10E3 1171 1273 E007 C2E9 3532 0DA4 F259 9B5E C634 User-Agent: Mutt/1.5.21 (2010-09-15) Subject: Re: mutual forwarders in ISC BIND X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 28 Dec 2011 17:52:25 -0000 Damien Fleuriot wrote: > > > >> > >> If you're trying to build up a cache to improve performance and response > >> time, here's your scenario: > >> > >> DNS C, forward to DNS A,B for all queries > >> DNS D, forward to DNS B,A for all queries > >> > >> Your cache will start building up and only responses that are not cached > >> will be taken from your NS A and B servers. > > > > Sorry, I fail to see how this is any better than two independent DNS > > servers. Perhaps a variant like > > > > DNS C, forward to DNS A > > DNS D, forward to DNS A > > > > would be close to the goal of cache consolidation. > > > > DNS A suffers an outage ; you're fucked, to put it bluntly. Nope. DNS C and D will do the queries on their own. I don't suggest a "forward only" setup. I just want the servers to share the cache. [dd] > > On a side note, have you considered unbound ? > > It may be better suited to your needs and scale. I would read a comparison of BIND and Unbound with great interest. Do you perchance have a link? -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN sip:sudakov@sibptus.tomsk.ru