Received: from localhost (unknown [200.46.204.184]) by postgresql.org (Postfix) with ESMTP id 5501A2E022F for ; Mon, 14 Jan 2008 04:28:05 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.184]) (amavisd-maia, port 10024) with ESMTP id 29571-05 for ; Mon, 14 Jan 2008 04:27:56 -0400 (AST) Received: from mx01.bfk.de (mx01.bfk.de [193.227.124.2]) by postgresql.org (Postfix) with ESMTP id E31B02E02C2 for ; Mon, 14 Jan 2008 04:27:59 -0400 (AST) Received: from mx00.int.bfk.de ([10.119.110.2]) by mx01.bfk.de with esmtps (TLS-1.0:RSA_AES_256_CBC_SHA1:32) id 1JEKfj-0004WU-8e; Mon, 14 Jan 2008 09:27:55 +0100 Received: from fweimer by bfk.de with local id 1JEKfg-0002sh-BL; Mon, 14 Jan 2008 09:27:53 +0100 To: Steve Atkins Cc: PostgreSQL Performance Subject: Re: Best way to index IP data? References: <200801101614.54729.kevin@kevinkempterllc.com> <36e682920801101541o7626bbddj428617144240c554@mail.gmail.com> <13179.1200064791@sss.pgh.pa.us> <20080111162747.GT5294@mathom.us> <24044.1200082058@sss.pgh.pa.us> <20080111212703.GU5294@mathom.us> <20080111213710.GD8260@alvh.no-ip.org> <20080111220235.GX5294@mathom.us> <20080111222403.GA7527@crankycanuck.ca> <1259C7B1-C948-4326-B827-849C64B61A16@blighty.com> From: Florian Weimer Date: Mon, 14 Jan 2008 09:27:52 +0100 In-Reply-To: <1259C7B1-C948-4326-B827-849C64B61A16@blighty.com> (Steve Atkins's message of "Fri, 11 Jan 2008 14:38:27 -0800") Message-ID: <827iicizg7.fsf@mid.bfk.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200801/111 X-Sequence-Number: 28350 * Steve Atkins: > I don't think there's ambiguity about what an dotted-quad without a > netmask means, and hasn't been for a long time. Am I missing > something? Classful addressing is still part of many user interfaces, for instance Cisco's IOS. It's not just that the CLI accepts it, it's also the standard[*] output format (that is, "192.0.2.0" instead of "192.0.2.0/24"; if no prefix length is given, the one based on the class is used). [*] I don't think you can switch it off. Obviously, for backwards compatibility reasons, the default has to stay anyway. --=20 Florian Weimer BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstra=DFe 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99