From owner-freebsd-performance@FreeBSD.ORG Wed Sep 23 17:45:28 2009 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 7706E10656B1 for ; Wed, 23 Sep 2009 17:45:28 +0000 (UTC) (envelope-from oliver@FreeBSD.org) Received: from avocado.salatschuessel.net (avocado.salatschuessel.net [78.111.72.186]) by mx1.freebsd.org (Postfix) with SMTP id BF94D8FC1E for ; Wed, 23 Sep 2009 17:45:27 +0000 (UTC) Received: (qmail 18135 invoked by uid 89); 23 Sep 2009 17:45:26 -0000 Received: from unknown (HELO kartoffel.salatschuessel.net) (78.111.72.187) by avocado.salatschuessel.net with SMTP; 23 Sep 2009 17:45:26 -0000 Date: Wed, 23 Sep 2009 19:45:27 +0200 From: Oliver Lehmann To: Freddie Cash Message-Id: <20090923194527.0b3cfbb2.oliver@FreeBSD.org> In-Reply-To: References: <20090923180347.ee0ae193.oliver@FreeBSD.org> X-Mailer: Sylpheed 2.7.1 (GTK+ 2.16.6; amd64-portbld-freebsd7.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-performance@freebsd.org Subject: Re: gjournal, hardware raid, software raid X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 23 Sep 2009 17:45:28 -0000 Freddie Cash wrote: > I've never done anything with gjournal, so can't really comment on what > would be the better setup for it. However, I would like to point out that > there's a fourth option: > - configure the RAID controller to use 4 Single Disk arrays (or JBOD, not > sure when 3Ware added Single Disk support) > - use ZFS to create a raidz dataset using the 4 drives Uh... Ok, this might be an option generally but honestly not for me ;) Considering the money I've spent 3 years ago for buying the RAID controller and considering the load it takes from the system handling the RAID I think it is in the best interest for the system to keep the RAID-5 3ware internally. As you might have seen the system is not the fastest one with not that much of memory - so whatever load I can delegate I'm try to delegate off the CPUs. Today I would probably not spend the money buying a RAID controller again but use indeed ZFS instead. But back the time there was only (g)vinum - and I never liked it. -- Oliver Lehmann http://www.pofo.de/ http://wishlist.ans-netz.de/