[Tech] Re: Re: The effect of slow nodes

[toad]

On Fri, Dec 01, 2006 at 08:20:39PM +0100, Jano wrote:
> toad wrote:
> 
> > Throttling = request senders slow down when they see overload messages
> > or timeouts. Derived from TCP.
> 
> Slow down for all peers or only overloaded ones?

Nodes sending requests slow down when they see overload messages.
> 
> > Backoff = node doesn't route to another node for a while after a timeout
> > or overload message. This is doubled the following time, until we reach
> > a limit; it is reset if a request completes without overload or timeout.
> > Derived from ethernet.
> 
> Thanks.

Thanks.
> 
> > The theory goes that if there are many slow nodes on the network,
> > throttling would pull the whole network down to match their speed. This
> > is why we have backoff; to prevent this from happening.
> 
> Some more data apart from success/failure must be extracted from these sims
> to see what's really happening, I guess...
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