<div dir="ltr">Each APRS-IS maintains an internal table of packets it has seen in the last 30 seconds for dedup. After 30 seconds, the IS server throws them away.</div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature">--<br>Kenneth Finnegan<br><a href="http://blog.thelifeofkenneth.com/" target="_blank">http://blog.thelifeofkenneth.com/</a></div></div>
<br><div class="gmail_quote">On Sun, Jul 19, 2015 at 10:58 AM, Nagi Punyamurthula <span dir="ltr"><<a href="mailto:n0agi@n0agi.com" target="_blank">n0agi@n0agi.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Thanks – that’s what I thought.
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">What made me think of asking this question was given that the APRS-IS server checks for packet dups submissions, I was thinking, there had to be previous records
stored somewhere to compare w/. <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">So, that begs a question; how does the APRS-IS determine whether a record is dup vs not ? and what does it compare the new incoming packet to.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><a name="14ea777e0875d8d8__MailEndCompose"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></a></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Kenneth Finnegan [mailto:<a href="mailto:kennethfinnegan2007@gmail.com" target="_blank">kennethfinnegan2007@gmail.com</a>]
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<b>Sent:</b> Sunday, July 19, 2015 11:02 AM<br>
<b>To:</b> TAPR APRS Mailing List <<a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a>>; Nagi Punyamurthula <<a href="mailto:n0agi@n0agi.com" target="_blank">n0agi@n0agi.com</a>><br>
<b>Cc:</b> <a href="mailto:mnaprs@googlegroups.com" target="_blank">mnaprs@googlegroups.com</a><span class=""><br>
<b>Subject:</b> Re: [aprssig] APRS-IS Database :: Query for static dataset<u></u><u></u></span></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p>There is no such thing as the APRS IS database pool. It is just a firehose of packets and if you want to see past data you need to have saved it when it came through.
<u></u><u></u></p><div><div class="h5">
<p>Kenneth Finnegan<u></u><u></u></p>
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<p class="MsoNormal">On Jul 19, 2015 8:48 AM, "Nagi Punyamurthula via aprssig" <<a href="mailto:aprssig@tapr.org" target="_blank">aprssig@tapr.org</a>> wrote:<u></u><u></u></p>
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<p class="MsoNormal">Hello all<u></u><u></u></p>
<p class="MsoNormal">Is there a way to pull a static snapshot dataset from APRS-IS Database. That is, connect
<span style="font-family:Wingdings">à</span> get dataset (based on a few filters)
<span style="font-family:Wingdings">à</span> disconnect. The purpose of this is to get a historical snapshot of data from the APRS-IS Database pool. Is this query exposed today in APRS-IS infrastructure; or does one need to implement our own repository logic?
<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">I have been able to pull realtime JIT data via establishing a TCP connection to the server pool on port 14580. So, I know we can do that. But, I was not sure if it is possible
to pull static historical dataset and *<b>whether if that static view was even kept in the APRS-IS database pool</b>*.<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Any pointers here from the APRS-IS gurus
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<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal">Thanks<u></u><u></u></p>
<p class="MsoNormal">Nagi<u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d">73, N0AGI-Nagi</span><u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d"><img border="0" width="76" height="76" src="cid:image001.jpg@01D0C219.26E6B850" alt="cid:image001.jpg@01D08197.994BC970"></span><u></u><u></u></p>
<p class="MsoNormal"><a href="http://N0AGI.com/" target="_blank"><span style="color:#0563c1">http://N0AGI.com/</span></a><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
<p class="MsoNormal"><span style="color:#1f497d"> </span><u></u><u></u></p>
<p class="MsoNormal"> <u></u><u></u></p>
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