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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.mira.net.au!news.vbc.net!alpha.sky.net!news.sprintlink.net!new-news.sprintlink.net!newsreader.sprintlink.net!news.sprintlink.net!news-ana-7.sprintlink.net!newsfeed.internetmci.com!hunter.premier.net!uunet!in1.uu.net!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: 15 Jul 1996 14:21:20 GMT Organization: Demos Online Service Lines: 21 Message-ID: <4sdk50$9cp@news.demos.su> References: <mandrews.837437077@bob.wittenberg.edu> NNTP-Posting-Host: andy@sf.demos.su X-Newsreader: TIN [version 1.2 PL2] Xref: euryale.cc.adfa.oz.au news.software.nntp:24402 comp.unix.bsd.freebsd.misc:23610 Mike Andrews (mandrews@bob.Wittenberg.EDU) wrote: > Now that FreeBSD 2.1.5-RELEASE is out, is it safe to compile in the use > of mmap() in INN 1.4unoff4? Currently I have ACT_STYLE set to READ, and In 2.2-Current (a week before 2.1.5-R) mmap() was broken - nulls were added to 8K boundary at the end of active. Probably it is unsafe to use it in 2.1.5R. > working, but occasionally I get dangling symlinks scattered across the disk. > Maybe I just goofed somewhere, but ccd sounds like it'd be a performance win > as well. We've tested ccd on 2.2-C, on the 2 2G Seagates the best performance was as of one device (with interleave 64 and 128): read/write were 5.0-5.1/2.6-2.7 Mbps, direct i/o (dd if=/dev/rccd0 of=/dev/null) was 8.7 Mbps, the same of one disk is above 5 Mbps, so one can see that the performance of raw metadevice is much more than of metadevice FS. And ccd worked stable for a week under severe load. ________ ANDY