Article View: alt.folklore.computers
Article #620174Re: Important US technology companies sold to foreigners
From: Anne Lynn Wheeler
Date: Tue, 06 Feb 2018 04:20
Date: Tue, 06 Feb 2018 04:20
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3115 bytes
Andrew Swallow <am.sw...@btinternet.com> writes: > I suspect the main problem was shortage of ram (especially when using > magnetic core). The system probably had a two packets in > transmission. A satellite needs buffering for 30-40 packets. With > multi-hop delays can easily exceed one second. But number of packets that could be sent over terrestrial T1 link would quickly exceed the "window" pacing limit ... before ACKs started to be received ... so transmission would stop leaving much of the capacity unused ... before ACKs started arriving to reduce the number of outstanding packets. We went to dynamic adaptive rate based pacing ... which could aggressively use all the transmission capacity. There was a presentation at 1988 (internet) IETF standards meeting about problems with window based pacing because number of packets outstanding (un-acked) is proportional to latency times bandwidth ... pointing out that coast-to-coast terrestrial gigabit bandwidth has the same problems as satellite latency at lower bandwidth. past hsdt posts http://www.garlic.com/~lynn/subnetwork.html#hsdt
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