[bittorrent] Protocol Deviation in Mainline

Olaf van der Spek olafvdspek at gmail.com
Thu Mar 2 03:36:21 EST 2006


On 3/2/06, Elliott Mitchell <ehem at m5p.com> wrote:
> >From: Olaf van der Spek <olafvdspek at gmail.com>
> > I did notice (one of the users of my client) and I decreases chunk
> > size from 32 to 16 kbyte.
> > uTorrent copied mainline's behaviour and refused to argue about it.
>
> I figured. Realistically it shouldn't make too much of a difference
> (though it does increase overhead slightly).
>
> I'm guessing the most likely reason is to allow other messages more often
> and therefore keep a more accurate picture of the swarm. This though is
> spurious reasoning, you're still likely to continue in progress pieces.
> Could be the desire is to more precisely tit-for-tat, but this is also

That's the reason uau mentioned.

> spurious because on any links you're going to transfer a lot more than
> 32KB in one choke-period (10 seconds) so the increased precision simply
> get overwhelmed. Even the old 32KB is small compared to most files being
> transfered and bandwidth, why cap at 16KB? (I can't see it doing anything
> but breaking compatibility)


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