Path: utzoo!mnetor!uunet!husc6!ukma!david From: david@ms.uky.edu (David Herron -- One of the vertebrae) Newsgroups: comp.dcom.lans Subject: Re: Ethernet utilisation Message-ID: <9110@g.ms.uky.edu> Date: 2 May 88 04:17:08 GMT References: <47@xenon.UUCP> Reply-To: david@ms.uky.edu (David Herron -- One of the vertebrae) Organization: U of Kentucky, Mathematical Sciences Lines: 21 Keywords: ethernet csma/cd utilisation In article <47@xenon.UUCP> goodloe@xenon.UUCP (Tony Goodloe) writes: >I have heard (from some forgotten source ) that the access mechanism used on >Ethernet will not allow a REAL csma/cd network to achieve more than about >50%-60% network utilisation. Can someone point me in the direction of a paper, >article, personal experience, etc. that supports or refutes this claim? >Many thanks. Well, there's an existence proof that you can get 80-85% utilization, from ONE host at that. Van Jacobsen & Mike Karels has been working on the TCP/IP code in 4.3BSD and fine tuned it to really screem. They've been getting a bit over 8mbit/sec through put from otherwise unmodified Sun 3/50's over ether. The only problem was insufficient buffering in some VMS hosts on their net ... the VMS hosts crashed for some odd reason, probably nobody ever thought anybody could tie up an ethernet so well :-) -- <---- David Herron -- The E-Mail guy <---- or: {rutgers,uunet,cbosgd}!ukma!david, david@UKMA.BITNET <---- Windowing... The Amiga has windowing. The Mac has windowing (echoes of <---- Jonathan Livingston Seagull: "Just flying? A mosquito can do that much!").