From mboxrd@z Thu Jan 1 00:00:00 1970 From: Emmanuel Florac Subject: Re: How to configure 36 disks ? Date: Mon, 23 Mar 2009 15:12:57 +0100 Message-ID: <20090323151257.1c7c0a8e@harpe.intellique.com> References: <5d96567b0903230659t734677a3pb4fd77cccb54008b@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: linux-fsdevel@vger.kernel.org, Linux RAID Mailing List , linux-xfs@oss.sgi.com, linux-aio@kvack.org, "linux-ide@vger.kernel.org" To: Raz Return-path: In-Reply-To: <5d96567b0903230659t734677a3pb4fd77cccb54008b@mail.gmail.com> Sender: owner-linux-aio@kvack.org List-Id: linux-fsdevel.vger.kernel.org Le Mon, 23 Mar 2009 15:59:47 +0200 Raz =E9crivait: > 1. redundancy. fair. less likely three disks will break in a single > raid 2. performance. bad. > 3. modularity. yes. grows > 4. Size 24TB I don't understand why you'd have a bad performance here. I usually notice a very slight difference between LVM and linux-raid raid0 in all practical benchmarks. Did you use LVM striping capability? You may have to adjust readahead (using blockdev --setra) on each device /dev/dm-X and /dev/md-X) to achieve optimal performance. --=20 ---------------------------------------- Emmanuel Florac | Intellique ---------------------------------------- -- To unsubscribe, send a message with 'unsubscribe linux-aio' in the body to majordomo@kvack.org. For more info on Linux AIO, see: http://www.kvack.org/aio/ Don't email: aart@kvack.org