Johnathan Corgan wrote: > Brett L. Trotter wrote: > > >> Yay- congratulations- transferred 100MB successfully and all of my >> 'stumbler' packets- even with UDP. >> > > You're using FSP (which goes over UDP), correct? FSP has a retry > mechanism, so good. Glad it's working now! > I used FSP for the 'stumblers' but did the 100MB with scp (though the FSP did work for the 'stumblers'- I'll test FSP on the big file here momentarily) > >> I'm going to continue work on the 8b/10b, because I still think >> that's the closest 'real' solution to the issue- and the overhead >> isn't as severe as repeating 1500 byte packets- >> > > Well, only the "stumbler" packets get repeated, and as you found, there > were only five in 10,000 that you tried. So your overhead isn't 100%, > it's no different than if your channel dropped one in 2000 packets. (For > those following, the problem before resulted in a complete link failure, > as the retransmitted packets on the connection would always fail CRC.) > True enough, but that was also with random data- ordered data could yield either significantly higher hangup rate or perhaps none at all. 8b/10b seems like a good generic robustness idea- as I said, I'll implement it and test it, and if anyone wants to turn it on, cool beans. > >> Worst case, it can be an option in the python that most people can >> leave turned off. >> > > An 8b/10b line coding scheme would probably be best implemented as a > standalone hierarchical block that a developer could choose to use or > not as part of a flow graph implementing a transmit and receive path. > Sounds like a good plan and more or less what I had in mind. > >> FYI: Am achieving nearly 100kb/s with -r 800k on a BasicTX >> > > Is that bytes or bits per second? > 89-94 kibibits per second, nifty! (And thats not accounting for SCP overhead) > -- > Johnathan Corgan > Corgan Enterprises LLC > http://corganenterprises.com > >
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