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

Scott,Keith L. KSCOTT at mitre.org
Wed Jul 6 15:27:48 EDT 2005


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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