From owner-freebsd-current@FreeBSD.ORG Fri Dec 14 14:07:24 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 3DC5716A418 for ; Fri, 14 Dec 2007 14:07:24 +0000 (UTC) (envelope-from kvs@binarysolutions.dk) Received: from solow.pil.dk (relay.pil.dk [195.41.47.164]) by mx1.freebsd.org (Postfix) with ESMTP id F2C4013C467 for ; Fri, 14 Dec 2007 14:07:23 +0000 (UTC) (envelope-from kvs@binarysolutions.dk) Received: from coruscant.binarysolutions.dk (naboo.binarysolutions.dk [80.196.17.173]) by solow.pil.dk (Postfix) with ESMTP id 8E97D1CC22F for ; Fri, 14 Dec 2007 14:47:29 +0100 (CET) Received: by coruscant.binarysolutions.dk (Postfix, from userid 502) id 34B6B91F98C; Fri, 14 Dec 2007 14:47:29 +0100 (CET) From: Kenneth Vestergaard Schmidt To: freebsd-current@freebsd.org 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> <1197637700.1250.35.camel@herring.rabson.org> <86abodxvbd.fsf@ds4.des.no> Date: Fri, 14 Dec 2007 14:47:29 +0100 In-Reply-To: <86abodxvbd.fsf@ds4.des.no> ("Dag-Erling =?iso-8859-1?Q?Sm=F8?= =?iso-8859-1?Q?rgrav=22's?= message of "Fri, 14 Dec 2007 14:25:10 +0100") Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (darwin) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable 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 14:07:24 -0000 Dag-Erling Sm=F8rgrav writes: > Doug Rabson writes: >> Dag-Erling Sm=F8rgrav writes: >> > 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. >> >> THis may also have to wait for a future version of ZFS. I remember >> reading about this kind of thing as an upcoming feature in Solaris. I >> believe the way this feature would work is that ZFS would allow creating >> the ZIL on a different pool to the filesystem - i.e. create a zpool on >> the CF card and get the ZIL to live there. > > AFAIK this is already implemented in ZFS, though I'm not sure Pawel has > merged it into FreeBSD yet. http://www.opensolaris.org/os/community/zfs/version/7/ You simply add a 'log' vdev to a pool. It's included in snv_75, maybe earlier. /Kenneth