Hi Brad,
On 15-May-02, you wrote:
>> getting with my 33.6k modem. But, based on a recent d/l of a 10.4MB file
>> that took roughly 1 and a quarter hours, I seem to be getting as much as
>> around 2400 cps (~19300bps), still a ways short of what you got.
>
> Is this a fairly typical rate? It's only slightly lower than I used to get
> with a 33k6 modem. IIRC, I got about 2500 cps average on compressed data.
I haven't been downloading many large files recently. Ok, now I've
downloaded a couple mp3's. The first one just over 4 million bytes, got
1667 cps. Though I may have been interrupting it somewhat with other
things I was doing at the same time. The second was over 4.7 million bytes
and took 33.25 minutes, yielding 2364 cps. I was not doing anything else
on that one that used any bandwidth or any significant processor time. For
all I know perhaps it gets interrupted very easily with minimal file
operations. There were the usual inexplicable pauses even when I wasn't
issuing ANY commands at all. And the second one was later at night, so
perhaps even it is the server itself that doesn't send continuously and did
so more continuously then. So I guess you could say the latter is a
typical maximum rate I get. On the last transfer though I did calculate it
at 2500 cps so far at one point halfway through.
I'm used to previously doing BBS transfers and getting about 80% of the
connection speed for throughput. That's using ZModem and 19200 bps
connection speed. So it seems rather low now to be getting only around
56%-60% of connection speed for throughput. But that is an internet
connection, and there's more potential slowing factors. Though the mp3's
are something that data compression should be speeding up even, yet it's
just 2500 cps at absolute best (60%). So I would say your 2500 cps figure
is about right, it's just surprising to me that's as high as it goes with a
33.6k modem and data compression. I got only 600 cps less than that using
my old A500 with the same modem, the stock serial port, stock processor,
and no data compression (on BBS's). I guess the internet transfers truely
are different. If there were any dial up BBS's left, I'd call one and see
what rates I would get on my current system.
Regards
--
__
///
__ /// Greg Zolot - aka Mizar
\\\/// Reno, Nevada
\XX/ Amiga Rules!
Experience is directly proportional to the value of equipment destroyed.
-- Carolyn Scheppner
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