[ldm-users] Pqact running behind

• To: "ldm-users@xxxxxxxxxxxxxxxx" <ldm-users@xxxxxxxxxxxxxxxx>
• Subject: [ldm-users] Pqact running behind
• From: "Morris, Dale A." <dmorris@xxxxxx>
• Date: Wed, 24 Apr 2013 17:13:53 +0000

We are having an unusual problem with LDM.  We are running the AWIPS-2 version 
of LDM that is redistributed by Raytheon and the NWS (the versions are based on 
ldm-6.8.1).

We have an upstream LDM box that feeds two downstream LDMs with similar 
pqact.conf and ldmd.conf files.  One box simply writes files out for an 
archive, while the other box writes data in the same structure, but also is 
connected to AWIPS-2 (using edexBridge) sending messages for  ingest and 
processing.  When running a pqutil command (e.g., pqutil -w -f NIMAGE ldm.pq) 
on both downstream boxes we verify that each product queue is updated very 
nearly simultaneously.  However, we see one box write out its data 
instantaneously while the other may be delayed by 20 or more minutes.  
Yesterday the ldm that fed AWIPS-2 was behind, and today the archive box is 
behind.  We made a hardware configuration change on the AWIPS-2 box today but 
no change whatsoever was made to the archive box.

Does anyone have any ideas what could cause this behavior?

Thanks,

Dale Morris
CIMMS/OU
NWS/Warning Decision Training Branch

• Follow-Ups:
  • Re: [ldm-users] Pqact running behind
    • From: Gerry Creager - NOAA Affiliate