Date: Mon, 21 Dec 2009 19:48:30 -0700 From: Ben Schumacher <benschumacher@gmail.com> To: freebsd-fs <freebsd-fs@freebsd.org> Subject: Re: Plans for Logged/Journaled UFS Message-ID: <9859143f0912211848n447183dfs7e0e4bd02e52c5ad@mail.gmail.com> In-Reply-To: <4B302A6D.3000408@modulus.org> References: <712903.15604.qm@web113517.mail.gq1.yahoo.com> <3612709F-15CA-4A59-86B1-2674BAA2936D@gmail.com> <240049.46806.qm@web113517.mail.gq1.yahoo.com> <alpine.BSF.2.00.0912220000360.73550@fledge.watson.org> <4B302A6D.3000408@modulus.org>
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On Mon, Dec 21, 2009 at 7:09 PM, Andrew Snow <andrew@modulus.org> wrote: > Is there any provision to put the journal on a seperate device? =C2=A0Thi= s can > solve the performance degradation issue. I'm not sure that would provide much more reliability, however. If you're adding a second device to use the journal you risk losing data if either device fails... given how small the data is (I believe 32 bytes per entry), I'm not sure it's really worthwhile. Most of what I've read in the past about FreeBSD's FS interactions seems to imply that the lower-level (ATA-layer) is not terribly optimized for larger drives and faster interfaces available these days. I'm sure I could go Google up some references, but I think it's been well covered in the past. Cheers, Ben
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