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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!nntp.coast.net!swidir.switch.ch!news.grnet.gr!btnet-feed2!unlisys!fu-berlin.de!news.mathworks.com!newsfeed.internetmci.com!demos!news.uni-stuttgart.de!news.urz.uni-heidelberg.de!rz.uni-karlsruhe.de!not-for-mail From: uk1o@rzstud2.rz.uni-karlsruhe.de (Felix Schroeter) 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: 4 Feb 1997 21:23:54 +0100 Organization: University of Karlsruhe, Germany Lines: 30 Message-ID: <5d85sq$27u@rzstud2.rz.uni-karlsruhe.de> References: <32DFFEAB.7704@usa.net> <5cphaj$qvg@cynic.portal.ca> <5d7rtu$ao9@rzstud2.rz.uni-karlsruhe.de> <5d81q1$8ls@cynic.portal.ca> NNTP-Posting-Host: rzstud2.rz.uni-karlsruhe.de Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Xref: euryale.cc.adfa.oz.au comp.os.linux.misc:155950 comp.os.linux.networking:67156 comp.os.linux.setup:95312 comp.unix.bsd.misc:2217 comp.os.ms-windows.nt.advocacy:51799 comp.os.os2.advocacy:265441 Hello! In article <5d81q1$8ls@cynic.portal.ca>, Curt Sampson <cjs@cynic.portal.ca> wrote: >In article <5d7rtu$ao9@rzstud2.rz.uni-karlsruhe.de>, >Felix Schroeter <uk1o@rzstud2.rz.uni-karlsruhe.de> wrote: >[...] >>The 1KB write size was hardcoded in the Linux (2.0.something) NFS >>client implementation. >[...] >Try an NFS test with 8 KB blocks, and you'll see just how broken >the TCP/IP implementation is. How do I do that? Patch the kernel or is there an easier way? > There's a very good reason that Linux >uses 1 KB blocks for NFS; the stack will crawl on 8 KB blocks >because it has to do an extra copy of all the data every time it >reassembles the fragments. (I described this in detail in another >post.) Hmmm. Does that adversary effect matter more than the adversary effect of *many* *synchronous* writes (yielding a write "performance" of about 35 kB/sec)? >cjs Regards, Felix.