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Re: Problems at UPRM (fwd)

Jeff Weber wrote:
> 
> Anne and Tom,
> 
> I believe you two can help Luis better than I...
> 
> -Jeff
> 
> ---------- Forwarded message ----------
> Date: Tue, 19 Jun 2001 19:40:29 -0400 (AST)
> From: Unidata Mcidas Account <address@hidden>
> To: Jeff Weber <address@hidden>
> Subject: Problems at UPRM
> 
> Hi,
>   A couple of weeks ago you helped me find a site from where to receive an
> LDM feed from.  I'm currently downloading from pluto.met.fsu.edu, but I
> seem to have a local problem.
>   As I had explained before, we used to have an SGI here which had LDM set
> up a couple of years ago(probably more than 3 years ago).  Then, we had a
> Linux machine which shared the information with that one.  The hard drive
> on the SGI machine which had the LDM/Mcidas info crashed just a couple of
> weeks after the Linux machine had some disk problemas and was reformatted.
> Bottom line is, I lost all the previous configuration files.  I had to
> install mcidas/ldm from scratch on the Linux machine.
>   Mcidas seems to work fine, except that it has no images to display.  I
> then remembered that the data was being downloaded to the SGI machine
> using LDM, and then it was being sent via ADDE to the Linux box.  I
> downloaded the LDM package, compiled and configured it.  My problem now is
> that I'm downloading the data, but I don't know what to do next.  I think
> my problem is with the decoders and with making the information availiable
> to Mcidas.  I installed some decoders and got a sample pqact.conf file.
> I have a lot of data on /var/data/ldm but I'm not sure what I'm supposed
> to do with it.  I'm almost sure it's not being decoded, when I run
> ldmadmin scour manually I get a bunch of errors, something about some
> folders not being found(which makes me believe they're not there because
> I'm not successfully decoding anything).  I've searched the support emails
> but I've found nothing relevant.  Is there some way to verify if I'm
> decoding the data?  If I am, what do I have to do in order to make
> this information availiable to the Mcidas program?  Am I making any sense?
>    Thank you for your time,
> 
> Luis Munoz
> System Administrator
> Caribbean Climate Center @ UPRM

Hi Luis,

I think you're making sense.  You had to rebuild your LDM from scratch,
and now McIDAS on another machine isn't displaying anything.  I will
help you with your LDM, that is, getting and decoding the data.  Tom is
our McIDAS expert - he can help you with the ADDE server and displaying
the data.

First, to confirm that that you're getting data into your product queue,
try 'pqcat -vl - > /dev/null'.  This will show you the products you've
got in your queue.  You should be getting all the products that you
requested in your ldmd.conf file.   Of course, this depends on when
products are distributed.  Most sites keep at least an hour's worth of
data in the queue.  To see the age of the oldest product in your queue,
do 'pqmon'.  The final field, called 'age', is the age in seconds of the
oldest product.  

Regarding decoding the products, a good way to verify that decoding is
successful is to see that files appear in the directories you specified
as arguments to the decoders in pqact.conf.  Please send me a copy of
your pqact.conf file so I can see what you're trying to do.  You might
also check to see if there are any decoders running currently.  Try
'ldmadmin ps' to see what ldm processes are running.  

Scour will indeed give you a message if it goes to scour something
that's not there.  But, there are several reasons why that might occur. 
Scour is configured with the file scour.conf.  Did you modify that file,
or are there entries in it that came with the distribution that don't
apply to your site?  Or, perhaps you requested data that hadn't arrived
before you ran scour.   Or maybe you're right, it's not being decoded
properly.  Can you rule out any of these possibilities?  Send me a copy
of your scour.conf file if you have questions about this.

Anne
-- 
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Anne Wilson                     UCAR Unidata Program            
address@hidden                 P.O. Box 3000
                                  Boulder, CO  80307
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