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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.ecn.uoknor.edu!news.wildstar.net!news.ececs.uc.edu!news.kei.com!news.mathworks.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!192.207.105.50!prodigy.com!darkstar.prodigy.com!davidsen From: davidsen@tmr.com (bill davidsen) Newsgroups: comp.os.linux.misc,comp.os.linux.networking,comp.os.linux.setup,comp.unix.bsd.misc,comp.os.ms-windows.nt.advocacy,comp.os.os2.advocacy Subject: Re: Linux vs whatever Date: 5 Feb 1997 22:41:00 GMT Organization: TMR Associates, Schenectady NY Lines: 35 Message-ID: <5db29s$tbk@usenet1y.prodigy.net> References: <32DFFEAB.7704@usa.net> <5cov5p$7hu@lynx.dac.neu.edu> <5cphaj$qvg@cynic.portal.ca> <5d7rtu$ao9@rzstud2.rz.uni-karlsruhe.de> NNTP-Posting-Host: darkstar.prodigy.com Originator: davidsen@darkstar.prodigy.com Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:156282 comp.os.linux.networking:67334 comp.os.linux.setup:95587 comp.unix.bsd.misc:2263 comp.os.ms-windows.nt.advocacy:51952 comp.os.os2.advocacy:265811 In article <5d7rtu$ao9@rzstud2.rz.uni-karlsruhe.de>, Felix Schroeter <uk1o@rzstud2.rz.uni-karlsruhe.de> wrote: | In article <5cphaj$qvg@cynic.portal.ca>, | Curt Sampson <cjs@cynic.portal.ca> wrote: | I used tcpdump to find out, what happened: | | The Linux NFS clients used 1 KB (!) NFS write requests, the server | executed the requests, including the fsync() as required by the NFS | specs (which slowed the writes down), *then* sent the acknowledges. | | The 1KB write size was hardcoded in the Linux (2.0.something) NFS | client implementation. Did you just mount the filesystems using default parameters, or did you specify larger buffersizes and not have them work? | But slow NFS performance is *no* evidence for slow TCP/IP performance. | The Linux NFS implementation is much more broken than its TCP/IP | implementation can ever be :-/ It's interestingly broken. It totally rots mounting off AIX, but runs faster off SCO. I haven't timed Linux to Linux in long enough to be afraid of using old data. | And on modern boxen, you can't see the difference of the two TCP/IP | implementations any more, unless you are using something faster than | 10 MBit Ethernet. That's about the way I read it. I don't like to use Linux with NFS, but the native speed of TCP is pretty good. -- -bill davidsen (davidsen@tmr.com) "As a software development model, Anarchy does not scale well." -Dave Welch