From owner-freebsd-fs@FreeBSD.ORG Mon Sep 19 18:49:46 2011 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 7C0141065670 for ; Mon, 19 Sep 2011 18:49:46 +0000 (UTC) (envelope-from jusher71@yahoo.com) Received: from nm23-vm2.bullet.mail.ne1.yahoo.com (nm23-vm2.bullet.mail.ne1.yahoo.com [98.138.91.211]) by mx1.freebsd.org (Postfix) with SMTP id 39F118FC0C for ; Mon, 19 Sep 2011 18:49:46 +0000 (UTC) Received: from [98.138.90.56] by nm23.bullet.mail.ne1.yahoo.com with NNFMP; 19 Sep 2011 18:49:45 -0000 Received: from [98.138.88.238] by tm9.bullet.mail.ne1.yahoo.com with NNFMP; 19 Sep 2011 18:49:45 -0000 Received: from [127.0.0.1] by omp1038.mail.ne1.yahoo.com with NNFMP; 19 Sep 2011 18:49:45 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 862152.24422.bm@omp1038.mail.ne1.yahoo.com Received: (qmail 42274 invoked by uid 60001); 19 Sep 2011 18:49:45 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1316458185; bh=owDhR3NtxYfeEEzUiUQgSHbIt5FQa3DNmq1y15Tuz+Q=; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding; b=1Vw1NOm1Yi/jw9LUZCDt00faJKwpSUG2wMemrSJmH4YgaDZfU6RQuWbX8BshXNkiCUhJ5TT/7S2qkiI52nBNfuMnhLBw+OV5Fc2XMz+aElo07exuChD0LcUsJ+1jKYRJEB3a2IcEPJIY+spMz2cSvye7lMj9VJ2dEvhjdBYALqE= DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Message-ID:Date:From:Subject:To:Cc:MIME-Version:Content-Type:Content-Transfer-Encoding; b=cH6RyNR+1Gk/g4qfyNy8vUEjEtdIt4EyOGoLEX7IJ3BrJVL64T/d0pAnuMQBbs5l2LDRHdFem8N6kZOJjUVjmC3C/zUYdoSv5m7HDRHf5uPEDUV8OoamFxL3MIlQaYxE4LqEq1cgigRGxYJF4KF3nWCNl66ZC8b4ypWHTavINeE=; X-YMail-OSG: YbTCLaoVM1mxpzpzUtlkjJR9Gv7DjsxbeIedioMIclvWBNq jB0n_eyFYM6jJ0k4pcLOFsIHNExZZ8y9JE0Ag5xq9xHN7zAUXdtQtAhx_25R O1xnskg8eXw9Kq04woqdA1evBj_tYY4R7.qaZZWFZ5gBjcIj5XMnUk3XDgdw 6.XI3SNqSwv6Qy2dLAiDl1zphg3AvC4E46ASgLOA1GjWCxlnOkhqIVJYHEec iMsDcoNNRDmdeIDbPnpmfu.rzKKM.oXpaiWxwVidkleDIWyiVYRkFLEW3te2 do9i7m.2nxguo9F8xG3kLhDJet2zyj5dh..jYnLI4IKTntp3buBOfw_j4vW5 P21mo2QbuUMYvDZK86JQ5wZa.db55x2S91nbsBlRNpX20exJRJwb7kvlJngG Dwot6GQ-- Received: from [192.251.226.205] by web121207.mail.ne1.yahoo.com via HTTP; Mon, 19 Sep 2011 11:49:45 PDT X-Mailer: YahooMailClassic/14.0.5 YahooMailWebService/0.8.114.317681 Message-ID: <1316458185.42258.YahooMailClassic@web121207.mail.ne1.yahoo.com> Date: Mon, 19 Sep 2011 11:49:45 -0700 (PDT) From: Jason Usher To: Joshua Boyd , Julian Elischer MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "freebsd-fs@freebsd.org" Subject: Re: ZFS obn FreeBSD hardware model for 48 or 96 sata3 paths... 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, 19 Sep 2011 18:49:46 -0000 =0A--- On Fri, 9/16/11, Julian Elischer wrote:=0A=0Awh= at is it you are trying to achieve?=A0 large storage, or high =0Atransactio= n rates? (or both?)=0A=0AI'm biased but I'd put a 160GB zil on a fusion-io = card=A0=A0=A0and dedicate =0A8G of the ram to it's useage.=0A=0Ait's remark= able what a 20uSec turnaround time on your metadata can do..=0A=0A---=0A=0A= I am optimizing for storage space - as much as possible for the budget.=0A= =0ASo we are going with SATA3 drives (the 3TB ones) and raidz3 (even though= it is a write-intensive application).=0A=0ABUT, in the context of those mi= serly constraints, I'm trying to figure out what mistakes to avoid and what= optimizations are worth making...=0A=0AThe fusion-io would be great, but a= nother $5k (or more) is not in the budget. I'm glad we can always add a ZI= L after the fact, and maybe we will do so with a cheaper (OCZ ?) pcie based= SSD...=0A=0A