[Dxspider-support] Pinging distant clusters

[Dirk Koopman]

What build are you using?

All DXSpider nodes have (for some considerable time) pinged their
immediate neighbours. They do this to determine whether the other node
is up. A connection is not reliable evidence of "upness" by itself.

In the latest builds, in an attempt to get node lists back to something
approaching reality, I have put in a facility which attempts to check
whether a route, for a node further away, offered by a neighbour node is
"believable".

This means that when a PC19 comes in, it and any other routing
information that appears subsequently is stored, a ping is sent to that
node and, if a reply is received, then that node is marked as believable
and its routing information released.

If no ping is received within a timeout period then all the routing info
is discarded, the node is marked "not believable" and all routing info
from that node is discarded.

Because this, potentially, is pretty draconian + experimental + routing
conditions change + I may not have got the algorithm right yet: there is
a timeout. After this timeout (actually for all nodes, believed or not),
when route info next comes in, a ping is sent to check whether there is
(still) a route.

Currently, again because I am trying to get an optimum set of routes,
that timeout is set to 12 hours (ie 1 ping every 12 hours IF (and only
IF) you receive routing information from that node.

If it causes you a problem you can increase it by doing:

set/var $DXProt::investigation_int = 86400 * 5

in the system startup script (for 5 days, which was the original
default).

However it has to be said, one ping at a minimum of 12 hours isn't
exactly as annoying as a whole slew of spurious, inaccurate and out of
date routing information - which just keeps coming. If you didn't get
(multiple copies) of their useless routing information - you wouldn't be
sending them pings!

My inclination might just be to say something pithy to people that
complain!  

73 Dirk G1TLH

On Thu, 2004-08-26 at 02:48, Dan Bookwalter wrote:
> i have been told that my clusters is PINGING the world
> and they would appreciate it if i could put a stop to
> it...
> 
> how do i go about this ??? i didnt realize what was
> happening...
> 
> thanks
> 
> Dan N8DCJ
> 
> 
> 		
> _______________________________
> Do you Yahoo!?
> Win 1 of 4,000 free domain names from Yahoo! Enter now.
> http://promotions.yahoo.com/goldrush
> 
> _______________________________________________
> Dxspider-support mailing list
> Dxspider-support at dxcluster.org
> http://www.tobit.co.uk/mailman/listinfo/dxspider-support
-- 
Please Note: Some Quantum Physics Theories Suggest That When the
Consumer Is Not Directly Observing This Message, It May Cease to
Exist or Will Exist Only in a Vague and Undetermined State.