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Re: 19991115: IDD Slowdowns

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  • Subject: Re: 19991115: IDD Slowdowns
  • Date: Tue, 16 Nov 1999 12:38:03 -0700 (MST)
 On Tue, 16 Nov 1999, Tom McDermott wrote:

> On Tue, 16 Nov 1999, Robb Kambic wrote:
> 
> > > So that would mean thelma or the means by which thelma receives NOAAPORT
> > > is experiencing some sort of problem?
> > > 
> > UCAR is doing some router changes that I believe is the problem with
> > thelma, this should be temporay. 
> 
> I forgot to mention possible network problems at UCAR; I believe this was
> also the case last month.
v> 
> > > We can't go on like this with missing or delayed data.  But I know the
> > > problems aren't exclusively at this end, esp. when ingest ceases entirely
> > > usually between 19Z and 21Z, which happened a couple of times last week.
> > > So trying to separate out these factors motivated my original question
> > > about problems within NOAAPORT.
> > > 
> > I'm unaware of all the outages of NOAAport you are talking about. No other
> > sites have mentioned any except the one last week. 
> 
> Besides the one on 11/10 which I assume you are referring to, the next
> day 11/11, we received no FOS data between 1903 and 2007.  We continued to
> receive MCIDAS & FSL2 (also fed from Cornell), NLDN, WSI and DIFAX data
> during this time frame.
> 
> > thelma is feed directly
> > by the NOAAport ingestor, with a backup feed from SSEC, that is backup up
> > by Alden. Most of the connections are vBNS.  I'm sending an attachment
> > with the thelma latencies for the WMO feed.  The last 2 numbers in the
> > lines are the latencies, 1st is average for hour and the second is the
> > max. 5@2730 means 5 seconds at 27 minutes and 30 seconds after the hour. 
> > I have rebuilt the queue a couple of times that causes the high
> > latencies.ie Today's rebuild at hour 14-16. Most of the average times are
> > less than sec, not too bad. Hopefully when the UCAR changes are done, the
> > time will be stable.
> 
> Are you having to rebuild the queue periodically, or just temporarily
> because of the router problem at UCAR?  

Tom,

It seems to coinside with network changes.  The queue was very stable
before the network changes started to occur.

Robb...

> 
> Thanks for the info & stats.  I will be looking at them.
> 
> Tom
> ------------------------------------------------------------------------------
> Tom McDermott                         Email: address@hidden
> System Administrator                  Phone: (716) 395-5718
> Earth Sciences Dept.                  Fax: (716) 395-2416
> SUNY College at Brockport
> 
> 

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