From owner-freebsd-current@FreeBSD.ORG Fri Dec 14 15:21:43 2007 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 11AB016A419 for ; Fri, 14 Dec 2007 15:21:43 +0000 (UTC) (envelope-from daved@tamu.edu) Received: from sr-7-int.cis.tamu.edu (smtp-relay.tamu.edu [165.91.22.120]) by mx1.freebsd.org (Postfix) with ESMTP id B821D13C46B for ; Fri, 14 Dec 2007 15:21:42 +0000 (UTC) (envelope-from daved@tamu.edu) Received: from localhost (localhost.tamu.edu [127.0.0.1]) by sr-7-int.cis.tamu.edu (Postfix) with ESMTP id F2A0855CCF; Fri, 14 Dec 2007 09:21:41 -0600 (CST) Received: from [192.168.1.46] (pool-71-113-249-98.herntx.dsl-w.verizon.net [71.113.249.98]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by sr-7-int.cis.tamu.edu (Postfix) with ESMTP id 6B0DE55D18; Fri, 14 Dec 2007 09:21:38 -0600 (CST) In-Reply-To: <86ir31xwlu.fsf@ds4.des.no> References: <47606C09.2070209@isc.org> <47609F0A.7010805@clearchain.com> <47609FE3.8040606@barafranca.com> <4760B444.1080604@clearchain.com> <06CAC7FC-DB58-441D-A6E0-76D1D8133393@tamu.edu> <86ir31xwlu.fsf@ds4.des.no> Mime-Version: 1.0 (Apple Message framework v752.2) Content-Type: multipart/signed; micalg=sha1; boundary=Apple-Mail-1-295164636; protocol="application/pkcs7-signature" Message-Id: From: David Duchscher Date: Fri, 14 Dec 2007 09:21:32 -0600 To: =?ISO-8859-1?Q?Dag-Erling_Sm=F8rgrav?= X-Mailer: Apple Mail (2.752.2) X-Virus-Scanned: amavisd-new at tamu.edu X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: freebsd-current@freebsd.org, Benjamin Close , Hugo Silva Subject: Re: ZFS melting under postgres... 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, 14 Dec 2007 15:21:43 -0000 --Apple-Mail-1-295164636 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=ISO-8859-1; delsp=yes; format=flowed On Dec 14, 2007, at 6:57 AM, Dag-Erling Sm=F8rgrav wrote: > David Duchscher writes: >> So does anybody know of a battery backed NVRAM card that can be used >> with FreeBSD that the ZIL could be offloaded to? > > Any CF card or similar will do. You don't need battery backup for > flash memory. I did think of that but is a CF card faster than a good SAS or SATA =20 drive? Fastest ones I found have a top rating of 45MB/s. The one =20 battery backed NVARM card that showed up in a google search had a =20 peak rate of 533MB/s. The question seems moot though since FreeBSD =20 doesn't currently support them. Thanks for your time, -- DaveD --Apple-Mail-1-295164636--