[Sis-SCPS-INTEREST] Advice on SCPS-TP settings document?

[Leigh Torgerson]

We're starting the process of updating the www.scps.org web site - we 
can put these suggestions / settings etc. on a page (some day a wiki 
site would be nice but just not enough hours in the day..)

If people would like to forward any tips, trick, lessons learned or 
recommended optional settings to me, I can get them on the web site..

Leigh

At 3:27 PM -0400 7/6/05, Scott,Keith L. wrote:
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>Hi,
>
>Does anyone have or know of a document that gives advice on what 
>optional SCPS-TP settings (e.g. from section C2.3 of the spec) would 
>be appropriate for particular environments?  Things that would seem 
>appropriate would be:
>
>     Use TCP for Transactions if you have short transactions and/or 
>want to push data with the SYN
>     Use window scaling if the BDP is high.
>     Use timestamps if you want a better notion of the RTT (e.g. to 
>help the Vegas congestion control alg.)
>     Use SNACK if the error rate is moderate or high.
>     [I don't know of anybody who uses record boundaries, but would 
>be interested if somebody has.]
>     Use header compression [unless you're massively processor-bound?]
>     Use ack frequency reduction if your path is very asymmetric 
>(with less bandwidth in the ACK direction) AND you've done something 
>to compensate for opening cwnd very slowly due to reduced ack 
>frequency.
>
>     [I don't know of anybody who uses BETS, but would be interested...]
>
>I left out "default source of data loss" and "non-use of congestion 
>control", because they start to depend on things that are harder to 
>fit on one or two lines, but you get the point.
>
>Anybody have one of these?
>
>         --keith
>
>
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J. Leigh Torgerson                           ltorgerson at jpl.nasa.gov
Jet Propulsion Laboratory - Communications Systems Research Sec. 331
NASA Space Communications Protocol Standards (SCPS) Project CTM
(818) 393-0695                                   (818) 393-4643 fax
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