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[LDM #UUC-234187]: Network on time, disk writes late?

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  • Subject: [LDM #UUC-234187]: Network on time, disk writes late?
  • Date: Fri, 31 Aug 2007 13:01:52 -0600
Niles,

> I have an LDM for which the network packets seem to be turning up just fine :
> 
> rttc-ingest:ldm> ldmadmin watch -f NEXRAD
> (Type ^D when finished)
> Aug 31 16:34:42 pqutil INFO:    17356 20070831163442.538 NNEXRAD 186882371  
> SDUS53 KPAH 311633 /pN0RVWX /NWSTG/0186882371
> Aug 31 16:34:42 pqutil INFO:    10416 20070831163442.553 NNEXRAD 186882372  
> SDUS73 KPAH 311633 /pN0ZVWX /NWSTG/0186882372
> Aug 31 16:34:42 pqutil INFO:    11218 20070831163442.562 NNEXRAD 186882373  
> SDUS22 KTAE 311633 /pN1RTLH /NWSTG/0186882373
> ^C
> rttc-ingest:ldm> date -u
> Fri Aug 31 16:34:46 UTC 2007
> 
> But files on disk are appearing late :
> 
> ls -l /home/ldm/data/ldm/nids/uc/nids/BMX/BREF1/20070831
> total 96
> -rw-rw-r--  1 ldm ldm 31946 Aug 31 16:15 20070831.1507.BREF1
> -rw-rw-r--  1 ldm ldm 32282 Aug 31 16:26 20070831.1517.BREF1
> -rw-rw-r--  1 ldm ldm 32520 Aug 31 16:34 20070831.1526.BREF1

It's impossible to tell from the above the delay between arrival
and writing to disk.  I suggest that you send a USR signal to
the relevant "pqact" process so that you can see the delay from
product-creation to product-processing.

> This development co-incided with a network reconfiguration that changed some 
> IP numbers,
> if that is relevant.

That shouldn't be relevant.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: UUC-234187
Department: Support LDM
Priority: Normal
Status: Closed