Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261853AbTH2SDv (ORCPT ); Fri, 29 Aug 2003 14:03:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261874AbTH2SDu (ORCPT ); Fri, 29 Aug 2003 14:03:50 -0400 Received: from tmi.comex.ru ([217.10.33.92]:12695 "EHLO gw.home.net") by vger.kernel.org with ESMTP id S261853AbTH2SDs (ORCPT ); Fri, 29 Aug 2003 14:03:48 -0400 X-Comment-To: Ed Sweetman Cc: linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net Subject: Re: [RFC] extents support for EXT3 From: Alex Tomas To: Ed Sweetman Organization: HOME References: <3F4E4605.6040706@wmich.edu> <3F4F7129.1050506@wmich.edu> <3F4F76A5.6020000@wmich.edu> <3F4F7D56.9040107@wmich.edu> <3F4F923F.9070207@wmich.edu> Date: Fri, 29 Aug 2003 22:09:13 +0400 Message-ID: User-Agent: Gnus/5.090018 (Oort Gnus v0.18) Emacs/21.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1367 Lines: 41 >>>>> Ed Sweetman (ES) writes: ES> Throughput 221.812 MB/sec 16 procs ext2 ES> Throughput 159.495 MB/sec 16 procs ext3-extents (definitely enabled) ES> Throughput 147.598 MB/sec 16 procs ext3 (patched but disabled) ES> There is an obvious improvement, but nothing near the 70+% increase ES> you saw. Subsequent runs run anything from a little lower than above ES> for extents to 167MB/s. it seems one of my scsi drive is a bit broken (caching, at least). sorry for invalid numbers. on another drive I see following: w/o extents: [root@zefir root]# /root/db2.sh 2 16 Throughput 119.199 MB/sec 16 procs Throughput 106.09 MB/sec 16 procs Average: 112.64450 with extents: [root@zefir root]# /root/db2.sh 2 16 Throughput 156.846 MB/sec 16 procs Throughput 170.591 MB/sec 16 procs Average: 163.71850 so, this time improvement is about 45% I can't explain this yet. need to be investigated carefully ES> By the way, what's the behavior of opening an existing non-extent file ES> and writing and reading to it while the partition is mounted with ES> extents enabled? those files are handled usual way - 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/