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[aprssig] Gating Objects from Internet to RF (fina?l)

Michael Wolthuis wolthui3 at msu.edu
Wed Jul 22 20:52:13 UTC 2009


I was wondering about the load it would place also on the APRS-IS, but still
like the idea of being able to use my IGATEs to send the local echolink
nodes.

I wonder if it should be more of a setup like Pete's CQSRV where you have to
send a message to ECHOSRV and it then returns the objects for the EL nodes
within say 20 miles of you based on your reported APRS position.  Thus load
is only user generated when users are requesting data and not constant.

This may defeat the LOCALINFO ideas of Bob though and goes more back to his
APRSDATA days when it was a queried resource as opposed to a dump all
design.

Just my .02.  Glad to see a lively discussion on a useful topic!

Mike
kb8zgl



On 7/22/09 4:42 PM, "Steve Dimse" <steve at dimse.com> wrote:

> 
> On Jul 22, 2009, at 4:23 PM, Robert Bruninga wrote:
> 
>> Lynn,
>> 
>> Great work!
>> I have only been trying to get this for the last half dozen
>> years or so.
> 
> One more thing. This is more than 2000 lines of data with more than
> 100 chars per line, and I heard a 10 minute cycle advocated by Bob.
> This is a huge amount to dump on the APRS Internet System. You must
> dribble this in over the full 10 minute cycle, even that may be too
> fast. It will add more than 3 packets every second, but dumping more
> than a few lines at a time will really have an adverse affect on the
> entire system. Every full stream will grow by 1 GB a month, a core
> server can expect to see its bandwith grow by nearly a terabyte a month.
> 
> I worry that this will be a huge load on every part of the system.
> findU will need 3 GB more for the raw data table alone to hold 90 days
> of this. I'm becoming less enthused the more I calculate the effect of
> this. I may need to add a filter to findU, especially if the data is
> not evenly spread out over the 10 minute cycle.
> 
> People complained about the load of citizen weather, this is more than
> what CW handled before it split off. I think the whole APRS community
> needs to debate whether this is a good use of a limited resource.
> 
> Steve K4HG
> 
> 
> 
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