Date: Fri, 14 Dec 2007 14:47:29 +0100 From: Kenneth Vestergaard Schmidt <kvs@binarysolutions.dk> To: freebsd-current@freebsd.org Subject: Re: ZFS melting under postgres... Message-ID: <m1d4t9v15a.fsf@coruscant.binarysolutions.dk> 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 %2B0100") 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>
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Dag-Erling Sm=F8rgrav <des@des.no> writes: > Doug Rabson <dfr@rabson.org> writes: >> Dag-Erling Sm=F8rgrav <des@des.no> writes: >> > David Duchscher <daved@tamu.edu> 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
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