From owner-freebsd-fs@FreeBSD.ORG Mon Oct 6 07:39:17 2008 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id ADD33106568F for ; Mon, 6 Oct 2008 07:39:17 +0000 (UTC) (envelope-from andrew@modulus.org) Received: from email.octopus.com.au (host-122-100-2-232.octopus.com.au [122.100.2.232]) by mx1.freebsd.org (Postfix) with ESMTP id 657E38FC28 for ; Mon, 6 Oct 2008 07:39:17 +0000 (UTC) (envelope-from andrew@modulus.org) Received: by email.octopus.com.au (Postfix, from userid 1002) id 5416017DB6; Mon, 6 Oct 2008 17:39:15 +1000 (EST) X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on email.octopus.com.au X-Spam-Level: X-Spam-Status: No, score=-1.3 required=10.0 tests=ALL_TRUSTED, DNS_FROM_SECURITYSAGE autolearn=no version=3.2.3 Received: from [10.20.30.100] (60.218.233.220.exetel.com.au [220.233.218.60]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: admin@email.octopus.com.au) by email.octopus.com.au (Postfix) with ESMTP id 1D31F17DA7; Mon, 6 Oct 2008 17:39:07 +1000 (EST) Message-ID: <48E9C08C.8040108@modulus.org> Date: Mon, 06 Oct 2008 18:38:52 +1100 From: Andrew Snow User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) MIME-Version: 1.0 To: Dimitar Vasilev References: <59adc1a0810051210t4a3503aci2bc06ba0aa5376c3@mail.gmail.com> <48E9556C.9060004@modulus.org> <59adc1a0810052225w6d8c1b78r226ffe8ca4ccf35d@mail.gmail.com> In-Reply-To: <59adc1a0810052225w6d8c1b78r226ffe8ca4ccf35d@mail.gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-fs@freebsd.org Subject: Re: zfs as layer distributor X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 06 Oct 2008 07:39:17 -0000 Dimitar Vasilev wrote: > Would love if someone to hear if someone has tested hardware raid6 and > zfs over it. Yes, I am using 3ware RAID6 over 16 disks as a single volume, because we also had UFS partitions that we wanted to keep. The performance is more than adequate, but not anywhere near if you used them as single disks. Personally - based on prior experience with certain hardware - I'd trust ZFS software raid over Areca hardware :-) How many disks do you have? If you can split up your disk pack into a group of between 5 and 10 smaller RAIDs, that is the optimal range for ZFS performance. - Andrew