From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030944AbXDPUPU (ORCPT ); Mon, 16 Apr 2007 16:15:20 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030947AbXDPUPU (ORCPT ); Mon, 16 Apr 2007 16:15:20 -0400 Received: from einhorn.in-berlin.de ([192.109.42.8]:58487 "EHLO einhorn.in-berlin.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030944AbXDPUPS (ORCPT ); Mon, 16 Apr 2007 16:15:18 -0400 X-Envelope-From: stefanr@s5r6.in-berlin.de Message-ID: <4623D94D.7040106@s5r6.in-berlin.de> Date: Mon, 16 Apr 2007 22:15:09 +0200 From: Stefan Richter User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.1.2) Gecko/20070408 SeaMonkey/1.1.1 MIME-Version: 1.0 To: Bernd Eckenfels CC: linux-kernel@vger.kernel.org Subject: Re: ZFS with Linux: An Open Plea References: In-Reply-To: X-Enigmail-Version: 0.94.1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Bernd Eckenfels wrote: > In article <4623BE2E.2020800@s5r6.in-berlin.de> you wrote: >> I meant that the central requirement on the design and implementation of >> audio subsystems is an (ideally guaranteed) bounded maximum of >> latencies; [...] >> You were talking about throughput of storage systems, for which latencies >> of the software part of the stack do not play such a central role. [...] > Unfortunatelle Latency is critical for a number of critical applications > like databases or file based transaction systems (mail, news) - mainly the > users of fsync(). Yes, I know that; and there may even be mass storage systems with actual realtime requirements. Note though that latencies in FUSE-based filesystems due to (what do I know) context switches and possibly CPU scheduling latencies are not necessarily relevant to the overall latencies in applications which you mentioned. Anyway, that's not at all what the original poster alluded to when he made vague statements about FUSE vs. kernelspace filesystems, finishing in the odd comparison with ALSA. (Please try not to delete Ccs.) -- Stefan Richter -=====-=-=== -=-- =---- http://arcgraph.de/sr/