X-RT-Original-Encoding: utf-8 Date: Thu, 12 Oct 2017 22:47:08 +1100 Return-Path: X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,BAYES_00, RP_MATCHES_RCVD autolearn=ham autolearn_force=no version=3.4.1 Delivered-To: bind9-confidential@bugs.isc.org X-Original-To: bind9-confidential@bugs.isc.org From: "Mark Andrews" Subject: Re: [ISC-Bugs #46241] Resolver Prefetch behavior when forwaders are set? To: bind9-confidential@isc.org X-RT-Interface: Email In-Reply-To: Your message of "Tue, 10 Oct 2017 08:10:01 -0000." References: <4547_1507622993_59DC8051_4547_363_1_CE4FAF3618C2E5478E9EA2A6CD6334BB271BCC55@OPEXCNORM2C.corporate.adroot.infra.ftgroup> X-RT-Incoming-Encryption: Not encrypted Received: from mx.ams1.isc.org (mx.ams1.isc.org [199.6.1.65]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mx.ams1.isc.org", Issuer "COMODO RSA Organization Validation Secure Server CA" (not verified)) by bugs.isc.org (Postfix) with ESMTPS id 5CF52D78B0A for ; Thu, 12 Oct 2017 11:47:15 +0000 (UTC) Received: from zmx1.isc.org (zmx1.isc.org [149.20.0.20]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx.ams1.isc.org (Postfix) with ESMTPS id EBD1B24AE21 for ; Thu, 12 Oct 2017 11:47:02 +0000 (UTC) Received: from zmx1.isc.org (localhost [127.0.0.1]) by zmx1.isc.org (Postfix) with ESMTPS id 259CE16005B for ; Thu, 12 Oct 2017 11:47:11 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by zmx1.isc.org (Postfix) with ESMTP id 0E4FD160079 for ; Thu, 12 Oct 2017 11:47:11 +0000 (UTC) Received: from zmx1.isc.org ([127.0.0.1]) by localhost (zmx1.isc.org [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id wrcTME5XunGF for ; Thu, 12 Oct 2017 11:47:10 +0000 (UTC) Received: from rock.dv.isc.org (c27-253-115-14.carlnfd2.nsw.optusnet.com.au [27.253.115.14]) by zmx1.isc.org (Postfix) with ESMTPSA id C225616005B for ; Thu, 12 Oct 2017 11:47:10 +0000 (UTC) Received: from rock.dv.isc.org (localhost [IPv6:::1]) by rock.dv.isc.org (Postfix) with ESMTP id 0D1B28AC6AEE for ; Thu, 12 Oct 2017 22:47:08 +1100 (AEDT) Message-ID: <20171012114708.0D1B28AC6AEE@rock.dv.isc.org> From marka@isc.org Thu Oct 12 11:47:15 2017 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on mx.ams1.isc.org content-type: text/plain; charset="utf-8" RT-Message-ID: Content-Length: 417 Remember that this instance of named is learning answers which are also counting down the TTL as they come from the forwarder. The prefetch triggers a prefetch in the forwarder assuming it supports it but the learnt ttl is the same value the record that triggered the prefetch. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@isc.org