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[IDD #WMT-338636]: Upstream Data Feeds

Hi Tim,

re:
> Hello, my name is Timothy "Connor" Nelson. I am a student at South Dakota
> School of Mines and Technology. Currently, our school has an LDM set up for
> Gempak; however, I need to set one up on a separate computer for field
> research that a research team would be using.

OK.

re:
> I am not the one operating
> the other LDM at the University. This other one needs to be left alone and
> not changed.

The most efficient way (meaning the way to minimize network bandwidth use)
is for one LDM at an institution to relay data to the other LDM(s).  In
order to do this, the ~ldm/etc/ldmd.conf file for the original machine
would need to be edited to add appropriate ALLOW(s) for the other machine(s)
it would relay data to.  This assumes, of course, that the LDM to act
as a relay has the data that the other machines want/need.

re:
> I'm not sure if we are qualified for IDD,

You are.

re:
> but if we are,
> here's the information for upstream data feeds required. Again, I am
> setting up a separate LDM from the one our school is currently using. Thus,
> we would have multiple LDM's for different computers and different projects:

> ...
> So, for this project (A10) here's the information:
> 
> Site: South Dakota School of Mines and Technology
> LDM Administrator: Timothy "Connor" Nelson
> Phone: 740-505-1902
> email: address@hidden
> hostname: MI-RM201A-03L

What we need is the fully-qualified hostname and IP address of
your machine.  The other thing that is needed is forward (name to IP)
and reverse (IP to name) DNS to be setup for your machine.  When
both forward and reverse DNS are available for an '.edu' machine,
one is assured that feed REQUESTs to most upstream hosts will be
honored/work.

re:
> feedtypes: FNEXRAD, WSI, NEXRAD3, NEXRAD2, NXRDSRC

Comments:

- the feeds of interest are not being REQUESTed by the existing
  SDSMT machine running the LDM, unidata.sdstate.edu

  This means that that your new machine would REQUEST the feeds
  directly from upstream feed host(s).

- WSI is a proprietary point-to-point feed from WSI corporation.
  The WSI feed is not relayed in the Unidata IDD.

- NXRDSRC is used exclusively at NCDC, it is not part of the IDD

Please be aware that the remaining feeds you have indicated that you
want are quite voluminous.  Here is a snapshot of the feeds available
in the IDD and their respective volumes:

Data Volume Summary for shemp.unidata.ucar.edu

Maximum hourly volume  30945.209 M bytes/hour
Average hourly volume  20895.266 M bytes/hour

Average products per hour     366853 prods/hour

Feed                           Average             Maximum     Products
                     (M byte/hour)            (M byte/hour)   number/hour
NEXRAD2                7242.151    [ 34.659%]     8911.836    82024.646
CONDUIT                4246.638    [ 20.323%]     8809.083    80659.562
NEXRAD3                2292.715    [ 10.972%]     2726.845   107527.625
EXP                    1723.898    [  8.250%]     3763.579     7015.917
NGRID                  1573.718    [  7.531%]     3384.791    21996.458
FSL2                   1436.051    [  6.873%]     1609.331     1684.917
FNMOC                  1102.307    [  5.275%]     6452.797     2941.354
HDS                     355.341    [  1.701%]      616.127    18025.729
SPARE                   284.263    [  1.360%]     1728.201       10.333
NIMAGE                  206.857    [  0.990%]      405.009      219.958
FNEXRAD                 122.984    [  0.589%]      148.102      106.250
GEM                     103.601    [  0.496%]      666.644      965.000
UNIWISC                  66.769    [  0.320%]      129.483       46.146
NOTHER                   53.723    [  0.257%]      368.726     1065.208
IDS|DDPLUS               53.363    [  0.255%]       65.480    42186.125
PCWS                     18.225    [  0.087%]       23.542       23.250
LIGHTNING                11.969    [  0.057%]       26.679      353.021
DIFAX                     0.586    [  0.003%]        2.786        0.917
GPS                       0.108    [  0.001%]        1.345        1.042

Question:

- do you have enough network bandwidth to get all of the feeds that you
  desire:

NEXRAD2                7242.151    [ 34.659%]     8911.836    82024.646
NEXRAD3                2292.715    [ 10.972%]     2726.845   107527.625
FNEXRAD                 122.984    [  0.589%]      148.102      106.250

  The reason that I ask is I seem to recall that there were bandwidth issues
  in the past at SDSMT.


Please send us the fully qualified hostname and IP address of your new machine
so that we can verifiy that DNS has been correctly setup for it.

Cheers,

Tom
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Ticket Details
===================
Ticket ID: WMT-338636
Department: Support IDD
Priority: Normal
Status: Closed