On Dec 3, 2008, at 8:26 PM, Nicholas Weaver wrote:
This is actually a big problem, as for many technologies (DSL,
cable), the last mile is highly asymmetric and, for some (eg,
Cable), the last hop uplink can often be a serious point of shared
congestion and cost (adding bandwidth means killing TV channels!).
Thus for some significant networks, P2P is a huge magnification in
aggregate cost even with perfect localization.
Is it a coincidence that the technologies listed are, in fact, legacy
mediums fixed to also do the internet?
Any commercial P2P content distribution scheme should include
caches. Such caches can be cheap & cheerful (a low power 1u server
with 2x1TB disks and a GigE and a boot-from-CD to boot from net
bootstrap startup, if you can't get this down to $1.5K, you're doing
something wrong) but should be accounted for right from the start.
It is a good fix to legacy infrastructure, yes. I guess, such caches
might function quite transparently, as "super-peers".
--
V
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