Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752166AbZISSM3 (ORCPT ); Sat, 19 Sep 2009 14:12:29 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751738AbZISSM3 (ORCPT ); Sat, 19 Sep 2009 14:12:29 -0400 Received: from mail-bw0-f210.google.com ([209.85.218.210]:43584 "EHLO mail-bw0-f210.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751697AbZISSM2 (ORCPT ); Sat, 19 Sep 2009 14:12:28 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=OWrPfaD3Wn0xuxjNZBLDUaPiYrwpOq2XxicpCfrhMJnAU3Cv320ypWc6209DEvLKzh rjXeXU1CupFU9Ia7gxyk8SgOkmiyI47DCHn85p3g1E8UM9CqhhuIqYV28Oh23cILbU6V guJt7ho0JORYVLzQl3BpehvTGMdGK5hIOurEc= MIME-Version: 1.0 Date: Sat, 19 Sep 2009 20:12:31 +0200 Message-ID: Subject: EXT4 RAID read performance From: wbrana@gmail.com To: linux-kernel@vger.kernel.org Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2517 Lines: 57 Hello, I'm considering replacing Reiser3 filesystem with some newer one. I ran compilebench benchmark. Read performance is lower with ext4. Is it expected or is it possible to fix it? Ext4: read tree total runs 11 avg 20.47 MB/s (user 0.53s sys 0.74s) read compiled tree total runs 4 avg 32.94 MB/s (user 0.61s sys 1.17s) Reiser3: read tree total runs 11 avg 26.33 MB/s (user 0.54s sys 0.81s) read compiled tree total runs 4 avg 41.82 MB/s (user 0.62s sys 1.36s) RAID details: md8 : active raid10 sda7[0] sdd7[3] sdc7[2] sdb7[1] 62925824 blocks 256K chunks 2 far-copies [4/4] [UUUU] Ext4: mkfs.ext4 -E stride=64,stripe-width=128 /dev/md8 mount -t ext4 -o noatime,auto_da_alloc,commit=600 /dev/md8 /mnt/md8 Reiser3: mount -t reiserfs /dev/md8 /mnt/md8 mount -t reiserfs -o noatime,notail /dev/md8 /dev/md8 Ext4 results: intial create total runs 10 avg 172.76 MB/s (user 0.43s sys 0.60s) create total runs 14 avg 36.49 MB/s (user 0.42s sys 0.59s) patch total runs 15 avg 15.16 MB/s (user 0.24s sys 0.49s) compile total runs 14 avg 64.07 MB/s (user 0.10s sys 0.59s) clean total runs 10 avg 393.43 MB/s (user 0.02s sys 0.06s) read tree total runs 11 avg 20.47 MB/s (user 0.53s sys 0.74s) read compiled tree total runs 4 avg 32.94 MB/s (user 0.61s sys 1.17s) delete tree total runs 10 avg 2.51 seconds (user 0.24s sys 0.42s) delete compiled tree total runs 4 avg 2.63 seconds (user 0.28s sys 0.50s) stat tree total runs 11 avg 1.99 seconds (user 0.23s sys 0.18s) stat compiled tree total runs 7 avg 2.11 seconds (user 0.27s sys 0.21s) Reiser3 results: intial create total runs 10 avg 82.74 MB/s (user 0.45s sys 1.13s) create total runs 14 avg 28.54 MB/s (user 0.45s sys 1.19s) patch total runs 15 avg 10.91 MB/s (user 0.24s sys 0.86s) compile total runs 14 avg 47.49 MB/s (user 0.10s sys 1.27s) clean total runs 10 avg 270.21 MB/s (user 0.02s sys 0.15s) read tree total runs 11 avg 26.33 MB/s (user 0.54s sys 0.81s) read compiled tree total runs 4 avg 41.82 MB/s (user 0.62s sys 1.36s) delete tree total runs 10 avg 3.38 seconds (user 0.24s sys 0.72s) delete compiled tree total runs 4 avg 4.14 seconds (user 0.27s sys 0.88s) stat tree total runs 11 avg 2.09 seconds (user 0.22s sys 0.18s) stat compiled tree total runs 7 avg 2.27 seconds (user 0.25s sys 0.21s) -- 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/