On Mar 8, 2023, at 6:50 PM, Dave McGuire
<mcguire(a)neurotica.com> wrote:
On 3/8/23 16:39, Paul Koning wrote:
That's a great milestone, and you deserve
large amounts of credit for making it a reality.
Agreed 100%!
I guess I need to add some statistics to the
HECnet mapper, showing the number of nodes seen as "up". And perhaps a graph
plotting that number over time. Maybe with options to span various amounts of time, the
way stock price charts do...
That would be good. What sort of polling interval do you think you could do with that?
I ask because all of LSSM's DECnet-capable machines (which are all real machines)
are on HECnet whenever they're running, but it's usually only for a few hours at a
time, either when we're working on stuff or when there are visitors at the museum.
The polling interval is 24 hours, but that doesn't tell the whole story. A number of
routers are configured to send topology change events to the mapper, and it reacts to
those by doing an incremental scan (with a 15 second holdoff). So in general, whenever
you turn a node or circuit on or off, the map should react right away. You can confirm
this, probably most easily by looking at the "map data" table (a link off the
map display).
If incremental update isn't working for your nodes, a possible reason would be that
there isn't an event source in the area. Since the topology changes that the mapper
reacts to are all level 1 events, they depend on a router in that same area to let me
know. So for changes in an area not covered by an event sender, the 24 hour poll cycle
applies. At the top of the map display this is shown: "Network data last
updated" is the full scan, and "Last incremental change" is the most recent
event driven scan of just the reported spot.
I have 11 event senders right now, in a couple of cases several per area (good for
redundancy) but clearly not all areas are covered. Those with routers that can send
DECnet events to a "monitor sink" interested to volunteer should drop me a note,
I can supply the desired setup. You can see the currently connected senders at the bottom
of akdesign.dyndns.org:8080/nsp/status
paul