From owner-freebsd-current@FreeBSD.ORG Fri Nov 13 01:54:21 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 74F4D106566C for ; Fri, 13 Nov 2009 01:54:21 +0000 (UTC) (envelope-from james-freebsd-current@jrv.org) Received: from mail.jrv.org (adsl-70-243-84-13.dsl.austtx.swbell.net [70.243.84.13]) by mx1.freebsd.org (Postfix) with ESMTP id DCFAE8FC0C for ; Fri, 13 Nov 2009 01:54:16 +0000 (UTC) Received: from kremvax.housenet.jrv (kremvax.housenet.jrv [192.168.3.124]) by mail.jrv.org (8.14.3/8.14.3) with ESMTP id nAD1sEFA041381; Thu, 12 Nov 2009 19:54:15 -0600 (CST) (envelope-from james-freebsd-current@jrv.org) Authentication-Results: mail.jrv.org; domainkeys=pass (testing) header.from=james-freebsd-current@jrv.org DomainKey-Signature: a=rsa-sha1; s=enigma; d=jrv.org; c=nofws; q=dns; h=message-id:date:from:user-agent:mime-version:to:cc:subject: references:in-reply-to:content-type:content-transfer-encoding; b=sYbdbQoLcTv3CHq2aaP2qAhOJGFIxHwyyms6QDsCAkl20Y97LPI7Awl7evt//lQZu xGuCbIEYsc08Yaatal2zYlDDtWoWooZjiDqFd0TU2erNrawf4det9zdt9plcfxEPsCN zJeZRlWGzu+zugGzpld85QtK+3tPMHQEV4P6bOM= Message-ID: <4AFCBC46.4010209@jrv.org> Date: Thu, 12 Nov 2009 19:54:14 -0600 From: "James R. Van Artsdalen" User-Agent: Thunderbird 2.0.0.23 (Macintosh/20090812) MIME-Version: 1.0 To: Ivan Voras References: <11167f520911111050j36dd94far667c81e6f5c18e69@mail.gmail.com> <20091111204903.GI89052@dan.emsphone.com> <11167f520911111326v13bb442bt36e853afbecdf834@mail.gmail.com> <9bbcef730911111352t12188bdajbca71bcf35a5beb5@mail.gmail.com> <11167f520911121044l74744c30u5a4d9ca008ab863c@mail.gmail.com> <11167f520911121101o403751ddmb544dfaf1c61bf1e@mail.gmail.com> <9bbcef730911121328t342b2268oceba3712b52511d4@mail.gmail.com> In-Reply-To: <9bbcef730911121328t342b2268oceba3712b52511d4@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: freebsd-current@freebsd.org Subject: Re: Help ZFS FreeBSD 8.0 RC2 Write performance issue X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 13 Nov 2009 01:54:21 -0000 Ivan Voras wrote: > So in short, you are saying the to get "normal" performance out of > ZFS+NFS, the best way is to invest in an Areca and 2 SSDs :)) The Areca seems very sensitive to the disk drives used and I had to abandon it. It takes a day or so to get the card's firmware to sound the on-board siren no matter which disk drives I tried. And in any case a couple of Silicon Image 3124 host adapters with external port multipliers is much faster: the CAM/SIIS driver with such a setup easily sustains > 800 MB/s and would do better but for bus bandwidth issues I didn't bother addressing.