Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755570AbYCPXjj (ORCPT ); Sun, 16 Mar 2008 19:39:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753024AbYCPXja (ORCPT ); Sun, 16 Mar 2008 19:39:30 -0400 Received: from phunq.net ([64.81.85.152]:33137 "EHLO moonbase.phunq.net" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752965AbYCPXj3 (ORCPT ); Sun, 16 Mar 2008 19:39:29 -0400 From: Daniel Phillips To: Alan Cox Subject: Re: [ANNOUNCE] Ramback: faster than a speeding bullet Date: Sun, 16 Mar 2008 15:39:11 -0800 User-Agent: KMail/1.9.5 Cc: Willy Tarreau , David Newall , linux-kernel@vger.kernel.org References: <200803092346.17556.phillips@phunq.net> <200803161536.20128.phillips@phunq.net> <20080316224633.140a5c99@core> In-Reply-To: <20080316224633.140a5c99@core> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200803161639.12555.phillips@phunq.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1634 Lines: 34 On Sunday 16 March 2008 15:46, Alan Cox wrote: > > Hostility does not equate to accuracy. Galileo comes to mind. > > I see no attempt to even discuss the use of two sets > of physical storage to maintain coherent snapshots, just comments about > hostility. That's a fairly poor way to repay people who spend a lot of > time working with enterprise customers and are interested in solutions > using things like giant ramdisks and are putting in time to discuss > alternative ways of achieving the desired result. You did not explain how your proposal will avoid dropping the transaction throughput down to disk speed, whereas I have explained how my existing design can be made to achieve enterprise-grade data safety. As far as I can see, there is no way to do what you propose without losing a couple of orders of magnitude of transaction response time under normal running conditions. If you can see a method that I cannot, then I am all ears. Until then... I just loved the earlier post to the thread: "It is not the best way to travel faster than light. It is just the only way". I do not think you have set out to solve the same problem I have, which is to attain the highest possible transaction throughput with enterprise scale reliability. If you would like to take my code and modify it to work just as you wish it, then of course you are more than welcome. Daniel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/