Article View: comp.dcom.sys.cisco
Article #364Re: speed capabilities of cisco terminal servers
From: RHUNTER
Date: Wed, 02 Sep 1992 07:30
Date: Wed, 02 Sep 1992 07:30
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I don't know whether it is relevant here on the Cisco bulletin board but... I have done a fair amount of testing of XRemote over SLIP (from NCD X-terminals to Cisco MGS). This involved satellite as well as terrestrial (tropo-scatter) radio. The main outcome of this is that X-remote functions best on LOW DELAY rather than HIGH bandwidth. e.g. a link at 9k6 with no delay could outperform an error-corrected/compressed link at 19k2 with 20msec delay. Don't be misled by claims of 4 fold compression using v42bis. The data in X-remote is already heavily compressed by the X-remote satck. It is also error protected by TCP. The explanation for the heavy dependence on delay is that although it's running over TCP with a large window size, X11 has a window size of 1 higher up. You can run it a 2Mbit over a satellite & it will never use more than 16k. It is actually then better to run raw X over tcp/ip! I think the main problem you are going to have is memory hogging, rather than processor speed. Each user will need approx 100k once they start multi-windows I await the resulting flaming with bated breath. Ray Hunter. Comms Engineer This work was done for a previous employer: since I no longer have the pleasure of working for them I can't possibly speak for them!
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<Sep.1.22.12.11.1992.23056@athos.rutgers.edu>Show Full Headers
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Path: arc1-ca.pugleaf.net!sparky!uunet!news.univie.ac.at!blekul11!frmop11!dearn!esoc!rhunter Organisation: European Space Operation Centre (E.S.O.C) Date: Wednesday, 2 Sep 1992 08:30:32 CET From: <RHUNTER@ESOC.BITNET> Message-ID: <92246.083033RHUNTER@ESOC.BITNET> Newsgroups: comp.dcom.sys.cisco Subject: Re: speed capabilities of cisco terminal servers References: <Sep.1.22.12.11.1992.23056@athos.rutgers.edu> Lines: 24