Received: from mx1.redhat.com (mx1.redhat.com [172.16.48.31]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id j238GGK09126 for ; Thu, 3 Mar 2005 03:16:16 -0500 Received: from Datawav.net ([63.228.244.4]) by mx1.redhat.com (8.12.11/8.12.11) with ESMTP id j238GEw5014775 for ; Thu, 3 Mar 2005 03:16:15 -0500 Message-ID: <4226C7C8.10406@theserrs.net> Date: Thu, 03 Mar 2005 01:16:08 -0700 From: Scott Serr MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [linux-lvm] lvm2 on raid5 speed, not so bad Reply-To: LVM general discussion and development List-Id: LVM general discussion and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: LVM general discussion and development Just to share some information... Here is a "bonnie -s 1024" on a P4 2.4 with 512MB RAM. The RAID5 is my weirdo way of doing multiple RAID5 devices so that I can move things around. All 4 RAID5 meta devices are on the same 5 disks... 300GB SATA and (4) 200GB PATA drives. LVM2 over RAID5 -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 1024 16987 69.9 34777 7.4 16659 4.1 21532 86.4 49760 9.2 470.7 1.7 "Hot" SATA 300GB (Maxtor) -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU 1024 23553 96.2 62613 14.0 26123 5.1 22094 87.5 57233 6.9 200.9 0.4 Forgot to mention that the RAID5 devices are 1024k "chunk-size". Filesystem is reiserfs. -Scott