Re: Location churn: empirical data

On Friday 16 May 2008 10:36, Jano wrote:
> Matthew Toseland wrote:
> 
> > On Thursday 15 May 2008 11:46, Jano wrote:
> >> Daniel Cheng wrote:
> >> 
> >> > 2008/5/14 Jano <[email protected]>:
> >> >> Matthew Toseland wrote:
> >> >>
> >> >>> Below are links to my node's location logs. A lot of the location 
churn
> > is
> >> >>> within roughly a slice of 10% of the keyspace, and the central signal 
is
> >> >>> reasonably clean... but this degree of variation is going to cause
> > problems
> >> >>> with routing and especially data retention IMHO (on a network of 
several
> >> >>> thousand nodes, with *at least* 1000 nodes online at a time). There 
were
> > a
> >> >>> whole bunch of resets during the week 19 April to 26 April, and on 
the
> >> >>> 24th, RC2 was released; on May 8th, 0.7.0 was released. These may
> > explain
> >> >>> some but not all of the long jumps...
> >> >>>
> >> >>> http://amphibian.dyndns.org/location.log.txt
> >> >>> http://amphibian.dyndns.org/locations.png
> >> >>
> >> >> See mine attached. This node has not been steadly 24/7 up as of late,
> > which
> >> >> can be more typical. It bounces a bit...
> >> >>
> >> > 
> >> > How many opennet connection do you have?
> >> 
> >> This node is pure opennet. So 20, I think.
> > 
> > Ok, in that case each time there is long downtime it will have to 
reseed...
> > even so, seeding is directional... but your new nodes won't be the same as
> > your old nodes, so it may partly explain it.
> 
> I thought that even in opennet, the node would try to reuse its old peers 
after
> restarting. Is this so? Still, I understand that long downtimes may cause 
more
> of your peers to vanish.

Yes, but if they are behind a NAT and not port forwarded they won't receive 
the packets sent by the node; they may have changed their IP if they're on a 
dynamic IP; and they may not want a peer. Long downtimes generally cause 
reseeding.

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