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Re: motherlode problems?

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  • Subject: Re: motherlode problems?
  • Date: Thu, 17 Aug 2000 11:01:42 -0600 (MDT)
On Wed, 16 Aug 2000, Pete Pokrandt wrote:

> 
> Hi all,
> 
> I just noticed that my feed to from motherlode.ucar.edu
> to sunset.meteor.wisc.edu had lagged up to an hour.  
> 
> Our connection to motherlode looks clean as a bell.
> 
> I just switched over to sunshine.ssec, and things are
> beginning to catch up.
> 
> I looked at the FOS topology page, and based on the 02 UTC
> data (Max Latencies for 2000-08-17-02) just about all the
> top level feeds had 11.9 or 12.something minutes lag, I'm
> assuming from motherlode.  Granted that's not an hour, but
> kinda strange that everyone has that same lag, and I'm guessing
> that at 03 UTC it's worse.
> > Anyways.. something up on motherlode?
> 
> Pete



It seems motherlode was having problems getting the data quickly from SSEC
(sunshine) while the noaaport.unidata.ucar.edu ingestor was down. UPC is
going to check into the local and external network performance.

Details: 

The noaaport.unidata.ucar.edu ingestor crashed because of lack of disk
space.  I was a victim of the problem that a newly created LDM queue
really doesn't allocate it's size completely.  For instance, a 800
megabyte queue may only allocated 63 megabytes initially.  As the queue
usage increases, the actual disk allocation increases also. The LDM
eventually ran out of disk space and it crashed.  To see the
real disk allocation, use the du command verses the ls command on ldm.pq.
Russ is working on a fix for this problem, this is an old LDM problem.


Robb...


> --
> +>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<+
> ^ Pete Pokrandt                    V 1447  AOSS Bldg  1225 W Dayton St^
> ^ Systems Programmer               V Madison,         WI     53706    ^
> ^                                  V      address@hidden       ^
> ^ Dept of Atmos & Oceanic Sciences V (608) 262-3086 (Phone/voicemail) ^
> ^ University of Wisconsin-Madison  V       262-0166 (Fax)             ^
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> 

===============================================================================
Robb Kambic                                Unidata Program Center
Software Engineer III                      Univ. Corp for Atmospheric Research
address@hidden             WWW: http://www.unidata.ucar.edu/
===============================================================================