Date: Sun, 16 Dec 2007 15:57:53 +0100 From: "Ivan Voras" <ivoras@freebsd.org> To: "=?UTF-8?Q?Dag-Erling_Sm=C3=B8rgrav?=" <des@des.no> Cc: freebsd-current@freebsd.org Subject: Re: ZFS melting under postgres... Message-ID: <9bbcef730712160657r79507740m2b6d7d4b787c99a5@mail.gmail.com> In-Reply-To: <86r6hmsnew.fsf@ds4.des.no> References: <47606C09.2070209@isc.org> <06CAC7FC-DB58-441D-A6E0-76D1D8133393@tamu.edu> <86ir31xwlu.fsf@ds4.des.no> <ADCCD5E6-A792-49B9-A346-753176C12F2E@tamu.edu> <fjuljp$cvb$1@ger.gmane.org> <476343B4.8080208@FreeBSD.org> <fk09p8$b16$1@ger.gmane.org> <86tzmk54tt.fsf@ds4.des.no> <fk0ue7$bp$1@ger.gmane.org> <86r6hmsnew.fsf@ds4.des.no>
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On 16/12/2007, Dag-Erling Smørgrav <des@des.no> wrote: > Ivan Voras <ivoras@freebsd.org> writes: > > These are all "normal" CompactFlash cards, for which the widely > > available size seems to be 16 GB max, right? > > So? That's more than enough for a ZFS intent log (as a rule of thumb, > the ZIL should be half the size of the server's RAM). Why do you consider ZIL to be a good candidate for putting on a SSD? Isn't it sequential-access mostly? > > Did you (or anyone) deploy CF drives for production servers? > > My router (and DNS, NTP and DHCP server) is a net4801 with a 1 GB CF > chip. Ok, these are probably embedded appliances that don't get much storage traffic. I was thinking about different kind of servers - database, web or file servers.
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