Date: Tue, 19 Feb 2008 21:40:40 +0100 From: Nikola =?UTF-8?B?TGXEjWnEhw==?= <nikola.lecic@anthesphoria.net> To: Bill Moran <wmoran@potentialtech.com>, Brian <bri@brianwhalen.net>, ivan dimitrov <dimitrovi58@yahoo.com> Cc: FreeBSD-Questions@FreeBSD.org Subject: Re: what is the meaning of "optimization changed from TIME to SPACE" Message-ID: <20080219214040.5baf6456@anthesphoria.net> In-Reply-To: <20080219102118.45e8b5d4.wmoran@potentialtech.com> References: <904190.99482.qm@web56804.mail.re3.yahoo.com> <47BAF276.2050809@brianwhalen.net> <20080219102118.45e8b5d4.wmoran@potentialtech.com>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: RIPEMD160 On Tue, 19 Feb 2008 10:21:18 -0500 Bill Moran <wmoran@potentialtech.com> wrote: [...] > > ivan dimitrov wrote: > > > After upgrading from freebsd-5.5-R to 6.3-R, I get the following > > > message in dmesg: > > > > > > "/storage/pub/www/ram: optimization changed from TIME to SPACE" [...] > UFS normally optimizes file placement for performance. Unfortunately, > in order to do this it has to write files in such a way that it > sometimes wastes some space. When the partition gets close to full, > FreeBSD automatically switches to "space optimization" which doesn't > waste any space, but doesn't perform as well. > > The short answer is, "This is happening because your partition is too > close to full. It's not an error, but you should clean up some files > or add space." > > It also has nothing to do with the difference between 5.5 and 6.3. It seems that man pages (such as newfs(8) and tunefs(8)) don't have a lot of details about this matter. OP can also read this very informative post regarding disk fragmentation and time/space optimisation: http://lists.freebsd.org/pipermail/freebsd-stable/2007-April/034711.html Regards. - -- Nikola Lečić = Никола Лечић fingerprint : FEF3 66AF C90E EDC3 D878 7CDC 956D F4AB A377 1C9B ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iQCVAwUBR7s+0fzDP9K2CKGYAQP7FQQAyrGPKIlbUCNPlasIpQJNAiJXYG7soOlG aj7ZpeL+Cnq/5EKT50TF9kc7tXvAOv9IrNsu6xg8QBe6gQVJJ/b56cKcZ48eC77y Pd+RXi/d1lweNZ9PSPqNpcsLvTrl/xnx4KOW7/E1jwFvufD01mgAsYDdVwa7KGrz Ky3Lv5ZlOLA= =5Thf -----END PGP SIGNATURE-----
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