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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.ysu.edu!news.cps.udayton.edu!news.conterra.com!newsfeed.internetmci.com!newsfeed.internetmci.com!EU.net!news.eunet.fi!news.spb.su!news1.relcom.ru!demos!sun-fox!andy From: andy@sun-fox.demos.su (Andrew A. Vasilyev) Newsgroups: news.software.nntp,comp.unix.bsd.freebsd.misc Subject: Re: FreeBSD 2.1.5, INN 1.4unoff4, and mmap() Followup-To: news.software.nntp,comp.unix.bsd.freebsd.misc Date: 16 Jul 1996 16:41:41 GMT Organization: Demos Online Service Lines: 28 Distribution: inet Message-ID: <4sggo5$ls@news.demos.su> References: <mandrews.837437077@bob.wittenberg.edu> <4sdk50$9cp@news.demos.su> <4sdndm$27k@brasil.moneng.mei.com> <4se8tq$sgf@news.demos.su> <4sg80v$3uu@brasil.moneng.mei.com> NNTP-Posting-Host: andy@sf.demos.su X-Newsreader: TIN [version 1.2 PL2] Xref: euryale.cc.adfa.oz.au news.software.nntp:24445 comp.unix.bsd.freebsd.misc:23749 Joe Greco (jgreco@brasil.moneng.mei.com) wrote: > My point was why would you care about overall disk bandwidth, so why would > you run a bandwidth test? Only to say that there is big gap: metadevice speed vs FS speed. I hope the optimisation will be done: ccd is very young now :) > "~S"? > If you mean the size of the article, you are wrong. Could you provide the theoretical value of stripe size for multiple reading/writing of small files? > No, you're forgetting - to retrieve an article requires multiple accesses. > You need to do multiple directory lookups, etc. If you really think about Well - here is the weakness of FreeBSD FS: when you access the file in a large directory in Solaris the lookup goes from the cache, you say in Free too, but the tests show that the efficiency of its cache is worse than of Solaris. So multiple lookups should not worry you on well-written FS :) So if we return to the thread start: in FreeBSD we have buggy mmap() and soggy ccd together with not so good directory cache. All these cause me to say the better platform for heavy loaded news server is Solaris. :(( ________ ANDY