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Re: 20000131: Multiple LDM capabilities

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  • Subject: Re: 20000131: Multiple LDM capabilities
  • Date: Tue, 01 Feb 2000 09:03:06 -0700
Unidata Support wrote:

> >To: address@hidden
> >From: Joanne Edwards <address@hidden>
> >Subject: Multiple LDM capabilities
> >Organization: Forecast Systems Laboratory
> >Keywords: 200001312340.QAA18420
>
> Hi,
>
> I would like to know if there is a capability in LDM for running
> multiple LDM servers on the same node, or for handling data of different
> priorities.  In our environment, we are hoping to use LDM to bring in
> some high priority text products - watches and warnings - but we don't
> want them stuck in the LDM queue behind lower priority products.  Is
> there a way in LDM to handle this?
>
> Thanks,
>
> Joanne Edwards
>
> --
> ********************************************************************************
> * G. Joanne Edwards                             NOAA/ERL/FSL                  
>  *
> * Modernization Division                        R/E/FS6                       
>  *
> * Forecast Systems Laboratory                   325 Broadway                  
>  *
> * Phone: 497-6903  Email: address@hidden  Boulder, CO 80303              *
> ********************************************************************************

Hi Joanne! It's Anne.  How are you doing?  I hope they're treating you well!

The main limitation to running 2 LDMs is that the LDM grabs port 388 for sending
and recieving data.  To run 2 LDMs would mean modifying the source code to
accomodate another port, and then the upstream site would have to know to send 
to
that port, resulting in another logical network... Not a great solution.

Also, currently there is no way to prioritize products, although we have had
discussions about how to do this in future versions.

Perhaps the simplest solution at this time, if you have the resources, is to 
set up
a separate box on which to run another LDM to listen only for those high 
priority
products.  The LDM will run on Linux, and those systems can be acquired 
relatively
cheaply.

Anne

--
***************************************************
Anne Wilson                     UCAR Unidata Program
address@hidden                  P.O. Box 3000
(303) 497-8677                    Boulder, CO  80307
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