[BitTorrent] BT repeater?

Olaf van der Spek OvdSpek at LIACS.NL
Wed Dec 8 11:58:17 EST 2004

Justin Cormack wrote:
> Any caching system like this does need to modify the protocol (well there
> are ways of getting round it). The basic problem is if you drop a piece
> as you are out of disk space you need to send donthave messages so no one
> asks you for it.

The alternative is to only drop pieces that all your peers already have.
Because you can simply unchoke the peers that still need those pieces, 
the only problem is when those peers take a (very) long time to download 

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