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Re: NOAAPORT receive system feeding LDM (fwd)


===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================

---------- Forwarded message ----------
Date: Mon, 18 Oct 1999 18:10:49 -0400
From: Jim Koermer <address@hidden>
To: Michael W Dross <address@hidden>
Subject: Re: NOAAPORT receive system feeding LDM

Mike,

We just had a full Unisys NOAAPORT system installed here at Plymouth
State, a little over a week ago. Based on our preliminary experience, I
would like to offer a few cautions before feeding into the IDD at this
time:

        - The NOAAPORT 1 seems to lock up more frequently than I would
        like to see. Over the past ten days, I've had to reboot it
        on about four occasions. Until this stabilizes, this behavior
        would leave downstream sites with frequent periods of no data.

        - You would also need to have downstream users be more specific
        with the pqact.conf specifications or they might become
        overwhelmed with data. When I turned on the pqing ingest on one
        of my machines running LDM, about 2 GB of disk space got used up
        in about 10 hours and I wasn't even ingesting NOAAPORT II (GOES-
        E) on that machine. Disk storage from the current IDD feed ramps
        up much less quickly.

Once these issues are resolved, you could set up the pqing ingest
process on the your IDD server and I believe that it would then just
pass along the data automatically to downstream sites.

                                Jim
-- 
James P. Koermer             E-Mail: address@hidden
Professor of Meteorology     Office Phone: (603)535-2325
Natural Science Department   Office Fax: (603)535-2723
Plymouth State College       WWW: http://vortex.plymouth.edu/
Plymouth, NH 03264



Michael W Dross wrote:
> 
> We have just installed a NOAAPORT receive system from Unisys that is has both
> the NWSTG and GOES EAST channels.  My intention
> is to feed the LDM with the output and make the data available over the IDD 
> to a
> university feed site (probably NIU) as a another feed source
> for the IDD community.  We are connected to the internet via a T3 with
> Sprintlink
> 
> My question is what is the best way to feed the LDM the NOAAPORT data?  How is
> Unidata doing it?  I have quite a bit of flexibility in
> distributing the data from the NP receive machines. FTP, NFS, Socket
> communications.  Dan Vietor at Unisys had told me that the LDM
> buffers could not keep up with a direct socket feed into the ldm and suggested
> that we dump the NP data into 2 minute temporary files then
> using `pqing` and ingest them in that way. I am doing something similar to 
> that
> now with the FOS data. I would rather feed it directly somehow.
> 
> If anyone has any suggestions please let me know as my goal is to essentially
> duplicate the NP feed from here that Unidata is send out.
> 
> Thanks!
> 
> Mike Dross
> address@hidden