Hello Don,
I agree that these graphs and labels can be quite confusing. Let me try
to explain you my understanding:
The label has 2 machines. The first one is the source machine for that
data. The second one is the machine that sent the data to your LDM ->
The last one in the data flow path to you.
The LDM´s manages what part of the feed will arrive to you from what
machines. In your case, you are receiving data from 2 sites (bigbird and
aoos), in a way that our feeding will be divided by these 2 providers
(see the color bars), and these 2 are being feed (by a network of LDM´s
that you dont see) by the 4 sources of conduit data.
Hope that this helps. Not much time for e-mails now.
Cheers,
Waldenio.
Don Morton wrote:
Hello,
Though I've been running an LDM server for a few months both in
downstream and upstream capacities, I'm still struggling with a lot of
this. We're looking into the prospect of upgrading our server (right
now it's just an old linux box sitting in my office) and even taking
over some of the campus load, and I'm trying to understand the
throughputs by looking at the iddstats pages, but I still don't have a
definitive explanation of the "labels" on the graphs. A classic
example is
<http://www.unidata.ucar.edu/cgi-bin/rtstats/iddstats_vol_nc?CONDUIT+augustine.net.images.alaska.edu>
Could I trouble somebody to take my line by line through the 8 lines
in the legend and explain the syntax to me (or point me to a document
that explains this)? "If" I understand the syntax correctly, it
implies that this server is receiving four "streams" (?) from
ldm.aoos.org <http://ldm.aoos.org> (and, I know for a fact that he
is), and four identical (?) streams from bigbird.tamu.edu
<http://bigbird.tamu.edu>?
Is this graph showing me "only" incoming packets (I believe someone
told me this is the case). To get a feel for outgoing packets, would
I simply find the iddstats pages of the downstream server and deduce
it from the downstream servers "incoming" packets?
For my own server, I'm looking at some EXP packets that I produce
myself, which then get picked up by NWS, but I also receive some EXP
packets (COSMIC stuff) from unidata:
<http://www.unidata.ucar.edu/cgi-bin/rtstats/iddstats_vol_nc?EXP+bear.arsc.alaska.edu>
When I look at iddstats for EXP, I'm not sure what I'm looking at -
the "label" on the graph doesn't suggest any unidata data source, so
I'm wondering if I'm looking at the outgoing packets that I generate?
I know these are stupid/basic questions, but I've been unable to find
something that would explain this to me, and any help would be
appreciated.
Thanks a lot,
Don Morton
--
Arctic Region Supercomputing Center
http://weather.arsc.edu/
http://www.arsc.edu/~morton/ <http://www.arsc.edu/%7Emorton/>
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