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Newsgroups: comp.unix.bsd.freebsd.misc,comp.os.linux.development.system Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!newsroom.utas.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.eng.convex.com!hermes.oc.com!news.unt.edu!cs.utexas.edu!howland.reston.ans.net!newsfeed.internetmci.com!EU.net!sun4nl!rnzll3!sys3.pe1chl!rob From: rob@pe1chl.ampr.org (Rob Janssen) Subject: Re: The better (more suitable)Unix?? FreeBSD or Linux Reply-To: pe1chl@wab-tis.rabobank.nl Organization: PE1CHL Message-ID: <DMrCE4.3HF@pe1chl.ampr.org> References: <4er9hp$5ng@orb.direct.ca> <4fg8fe$j9i@pell.pell.chi.il.us> <311C5EB4.2F1CF0FB@freebsd.org> <4fjodg$o8k@venger.snds.com> <4fo1tu$n31@news.jf.intel.com> Date: Wed, 14 Feb 1996 08:46:52 GMT Lines: 29 Xref: euryale.cc.adfa.oz.au comp.unix.bsd.freebsd.misc:13724 comp.os.linux.development.system:17273 In <4fo1tu$n31@news.jf.intel.com> haertel@ichips.intel.com (Mike Haertel) writes: >For some reason, in this sync-vs-async metadata discussion, >someone always brings up the claim that synchronous metadata >updates can leave you in a situation where fsck reports no >errors, yet you can have bogus data. >True. >Then they claim that async metadata update is superior, >because it doesn't have this problem. >FALSE! No, that is not exactly the claim. The claim is that the synchronous metadata updates are undesirable, because they slow down the system, and whatever consistency advantages they are said to have only make it more likely that fsck will report no errors, and don't improve the situation w.r.t. bogus data. The claim (usually) isn't that async metadata is better in this respect, but it is not worse and it is faster. Hence it is superior. Rob -- +------------------------------------+--------------------------------------+ | Rob Janssen rob@knoware.nl | BBS: +31-302870036 (2300-0730 local) | | AMPRnet: rob@pe1chl.ampr.org | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU | +------------------------------------+--------------------------------------+