[bolger] Re: Bandwidth
BO><snip> Think about bandwidth
BO>limits.
B<snip>
BO>Please explain.
Most of the world outside the US does not yet have superfast digital
lines capable of supporting very high speed data transfer. Most of the
world outside the US is reached via satellite with a dgree of congestion
on the lines. I'm a middle-level net user, 28.8 Kb modem plugged into a
copper 'phone-line of uncertain reliability. At its absolute fastest,
this gives me 7.5Kb/second download/transfer times, server to me. Insert
an overseas server and the satellites, and that reduces to 0.5Kb/second
up to about 2.0Kb/second when everything is really flying (rarely),
primarily because of congestion on the available data lines. A 200Kb
file will take 100 seconds to download at the latter rate and 400
seconds at the former , during which time I'm contributing to the
congestion, and so to the WorldWideWait. The 200Kb may be necessary, in
which case, tough. Or it may be a photo, in which 95% of the
information could be forwarded as a compressed .jpeg file at under 20
Kb, in which case a bit more bandwidth is opened up, either
incrementally speeding things up, or allowing someone else (eg you) room
to play.
Go to Altavista, or another search engine, and look up the Bandwidth
Preservation people's website for more detail. In the meantime, if the
photo absolutely must be 200Kb, why not transmit it as a .zip file. But
it's more elegant, as well as more efficient, and a demonstration of
both your technical skill and gentility, to use an effective compressed
format.
Tim & Flying Tadpole
BO>limits.
B<snip>
BO>Please explain.
Most of the world outside the US does not yet have superfast digital
lines capable of supporting very high speed data transfer. Most of the
world outside the US is reached via satellite with a dgree of congestion
on the lines. I'm a middle-level net user, 28.8 Kb modem plugged into a
copper 'phone-line of uncertain reliability. At its absolute fastest,
this gives me 7.5Kb/second download/transfer times, server to me. Insert
an overseas server and the satellites, and that reduces to 0.5Kb/second
up to about 2.0Kb/second when everything is really flying (rarely),
primarily because of congestion on the available data lines. A 200Kb
file will take 100 seconds to download at the latter rate and 400
seconds at the former , during which time I'm contributing to the
congestion, and so to the WorldWideWait. The 200Kb may be necessary, in
which case, tough. Or it may be a photo, in which 95% of the
information could be forwarded as a compressed .jpeg file at under 20
Kb, in which case a bit more bandwidth is opened up, either
incrementally speeding things up, or allowing someone else (eg you) room
to play.
Go to Altavista, or another search engine, and look up the Bandwidth
Preservation people's website for more detail. In the meantime, if the
photo absolutely must be 200Kb, why not transmit it as a .zip file. But
it's more elegant, as well as more efficient, and a demonstration of
both your technical skill and gentility, to use an effective compressed
format.
Tim & Flying Tadpole