Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?

• To: ldm-users@xxxxxxxxxxxxxxxx
• Subject: Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?
• From: Jeff Lake <admin@xxxxxxxxxxxxxxxxxxxx>
• Date: Mon, 30 Jul 2012 23:42:16 -0400

Ok .. enquiring  minds want to know...

what is the difference between the NEXRAD2 like below??
and just a simple FILE statement ??



-Jeff Lake
MichiganWxSystem.com
WeatherMichigan.net
TheWeatherCenter.net
GRLevelXStuff.com

On 7/30/2012 22:51, daryl herzmann wrote:

Gilbert,

On Mon, 30 Jul 2012, Gilbert Sebenste wrote:

Interesting. Sorry it has taken me so long to respond, but
I am gettign the feeds right on time. Blair, have you tried
something like this in your ldmd.conf:

exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/K[A-D] /home/ldm/etc/pqact.gempak_craft" exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/K[E-K] /home/ldm/etc/pqact.gempak_craft" exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/K[L-R] /home/ldm/etc/pqact.gempak_craft" exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/K[S-Z] /home/ldm/etc/pqact.gempak_craft" exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/T[A-Z] /home/ldm/etc/pqact.gempak_craft" exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/P[A-Z] /home/ldm/etc/pqact.gempak_craft"

Steve Emmerson kindly informed me that this is not quite the proper thing to do. Each pqact process should have an unique filename associated with it for when it writes state information to disk. The files can be simple sym links and it will 'trick' LDM just fine. So the recommendation is to simply:

cd /home/ldm/etc
ln -s pqact.gempak_craft pqact.gempak_craft.1
ln -s pqact.gempak_craft pqact.gempak_craft.2
ln -s pqact.gempak_craft pqact.gempak_craft.3
...etc...

Then in ldmd.conf

exec "/home/ldm/bin/pqact -f NEXRAD2 -p BZIP2/P[A-Z] /home/ldm/etc/pqact.gempak_craft.1"

Also note with the above, that you would be missing the radars starting with D,N, and R :) Here's what I use:

exec    "pqact -p BZIP2/K[A-D] -f CRAFT /home/ldm/etc/pqact.CRAFT"
exec    "pqact -p BZIP2/K[E-H] -f CRAFT /home/ldm/etc/pqact.CRAFT2"
exec    "pqact -p BZIP2/K[I-K] -f CRAFT /home/ldm/etc/pqact.CRAFT3"
exec    "pqact -p BZIP2/K[L-O] -f CRAFT /home/ldm/etc/pqact.CRAFT4"
exec    "pqact -p BZIP2/K[P-R] -f CRAFT /home/ldm/etc/pqact.CRAFT5"
exec    "pqact -p BZIP2/K[S-Z] -f CRAFT /home/ldm/etc/pqact.CRAFT6"
exec    "pqact -p BZIP2/[A-J] -f CRAFT /home/ldm/etc/pqact.CRAFT7"
exec    "pqact -p BZIP2/[L-Z] -f CRAFT /home/ldm/etc/pqact.CRAFT8"

The 2-8 files are sym links back to the mothership.

daryl

• References:
  • [ldm-users] NEXRAD2 Latency/Fragmented Data?
    • From: Blair Trosper
  • Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?
    • From: Jeff Lake
  • Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?
    • From: Blair Trosper
  • Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?
    • From: Blair Trosper
  • Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?
    • From: Gilbert Sebenste
  • Re: [ldm-users] NEXRAD2 Latency/Fragmented Data?
    • From: daryl herzmann