From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: with ECARTIS (v1.0.0; list xfs); Sun, 09 Mar 2008 14:39:45 -0700 (PDT) Received: from cuda.sgi.com (cuda1.sgi.com [192.48.168.28]) by oss.sgi.com (8.12.11.20060308/8.12.11/SuSE Linux 0.7) with ESMTP id m29LdZVd031167 for ; Sun, 9 Mar 2008 14:39:36 -0700 Received: from fg-out-1718.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9B1D1B0C534 for ; Sun, 9 Mar 2008 14:40:04 -0700 (PDT) Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.157]) by cuda.sgi.com with ESMTP id SsMuRrTYdBUgFifi for ; Sun, 09 Mar 2008 14:40:04 -0700 (PDT) Received: by fg-out-1718.google.com with SMTP id e12so1368465fga.8 for ; Sun, 09 Mar 2008 14:40:03 -0700 (PDT) Message-ID: <47D45926.5070806@gmail.com> Date: Sun, 09 Mar 2008 22:39:50 +0100 From: Rekrutacja MIME-Version: 1.0 Subject: xfs for free hosting on linux ? performance questions Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: xfs-bounce@oss.sgi.com Errors-to: xfs-bounce@oss.sgi.com List-Id: xfs To: xfs@oss.sgi.com hello, i'm going to create xfs on RAID 5 array consiting of 5 drives, each 500GB, it will be software raid made with mdadm on linux. i run free hosting, and the array is only for users files (system and such are on ext3). what options do you recommend while creating and while mounting? i had performance problems while testing this setup with bonnie++ and postmark (postmark especially). data will be in many directories, users files are in /var/www/users/username and i have more than 100 000 accounts. also a policy to make max 3 MB files, so most of my files are around 50 KB i think. so knowing this all, what would you advice me if i may ask? my current idea was like this: mkfs.xfs -l size=128m,lazy-count=1 mount -o nobarrier,noatime,logbufs=8,logbsize=256k this will have full backup, so i'm more after performance, not stability, so if you can give me some performance tips... (postmark run on array made from 4 disks, not 5, durning test, with parameters - number of files 10k, transactions 10k, subdirs 20k, was giving very very slow reads, around 200KB/s, while reiser4/btrfs were like 2MB/s reads, but even ext3 was faster - any idea why? i tested on 2.6.24.3 and 2.6.25-rc4 ) i keep seeing tests like this: http://www.t2-project.org/zine/1/ also, i have real life example, that 3 disks RAID-0 array with tweaked xfs is as fast as just one disk with reiser4 (my free hosting with millions of files) i know reiser4 is not stable (i also experienced this), so i'm asking if you know any additional tips to tweak xfs, or maybe you know why it has performance problems in some situations. thanks in advance