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Date:      Sat, 15 Dec 2007 23:04:04 +0100
From:      Ivan Voras <ivoras@freebsd.org>
To:        freebsd-current@freebsd.org
Subject:   Re: ZFS melting under postgres...
Message-ID:  <fk1j0l$o4l$1@ger.gmane.org>
In-Reply-To: <476419CD.9070401@terranova.net>
References:  <47606C09.2070209@isc.org>	<47609F0A.7010805@clearchain.com>	<47609FE3.8040606@barafranca.com>	<4760B444.1080604@clearchain.com>	<06CAC7FC-DB58-441D-A6E0-76D1D8133393@tamu.edu>	<86ir31xwlu.fsf@ds4.des.no>	<ADCCD5E6-A792-49B9-A346-753176C12F2E@tamu.edu>	<fjuljp$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> <476419CD.9070401@terranova.net>

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Travis Mikalson wrote:

> If you're using compact flash for something that's constantly updated
> like a ZIL, wouldn't your CF card die real quick?

Probably, for constant updates to the same areas. But as you say:

> Since a ZIL is not really seek-intensive, why not just offload it to it=
s
> own standard hard disk that has its write caching and all other similar=

> data-corrupting technologies disabled?

Yes. I don't see a point writing a log that's mostly sequantially
accessed on a SSD, and which probably wears the same areas on the drive.
I'm more interested in loads like databases.


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