Re: [Fwd: Re: 20000823: LDM, ldmfail questions from West Chester university]

Hi Rajul, 

Yes, the start of school can slam some networks.

I can start checking into other connect sites for you, but with Penn State
being an I2 school and close by I am hard pressed to think of a better
site. However, strange things happen in network land so I will poke around
and see if their may be a better place for you to feed from.

Keep me posted as to your connect with Penn State..
 and Cornell

Thank you,

-Jeff
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On Tue, 29 Aug 2000, Anne Wilson wrote:

> "Pandya, Rajul E." wrote:
> > 
> > Hi Anne,
> > 
> > Things seem about the same. I  thinned out the HDS feed request last night -
> > eliminating a lot of things. My ldmd files look like this now:
> > 
> > request DDPLUS ".*" navierldm.meteo.psu.edu
> > request  HDS "(^H)|(^[YZ].[QRA])|(^Y.[AI]... KWBH)" navierldm.meteo.psu.edu
> > request MCIDAS "^pnga2area Q." navierldm.meteo.psu.edu
> > 
> > Anyway, things seem to go a little better using this, but still not great.
> > My log files since I made the change last night look still shows lots of
> > reclass statements between 3-8 Z (it might be student traffic here but I'm
> > not sure).  I am missing some data from that time period also.  I am getting
> > similar reclass statements in my log for the last hour or so, as well, and
> > haven't been getting any data for a little less than an hour.
> > 
> > As far as WMO data (or now DDPLUS) I am getting that when I am getting data,
> > so I think the ldmd.conf is ok.
> > 
> > I am not sure if I should ask for another feed.  My traceroutes today
> > sometimes show a considerable amount of congestion here as well as showing
> > problems at PSU. I sort of suspected that I might have some local congestion
> > this week, school started here on yesterday. Do you have any
> > reccomendations?
> > 
> > Thanks for your continuing help.
> > 
> > Thanks,
> > Rajul
> > 
> 
> Hi Rajul,
> 
> It would be worth while to determine where the heavy traffic is occurring.  
> If it's on your campus, then there may be things your campus network 
> sysadmins could do to improve the situation.  (I would indeed suspect campus 
> traffic to be heavy when students are returning.)  If there are significant 
> delays at other sites then we can try changing your feed.  It could well be 
> both.  
> 
> Doing lots of traceroutes over a period of time should help to reveal what's 
> going on.
> If it was me, I would try setting up a cron job to run traceroute 
> periodically and gather the output.  I would run it, oh, say, every 2 - 3 
> minutes.  If you do this, add a 'date' command so that we can see the time of 
> day.  This would help us decide if we need to switch your feed or not.  Just 
> a thought...
> 
> Btw, another thought...   Are you sure the time on your computer is set 
> correctly?  If it's off that could cause lots of RECLASS messages and you 
> could miss data.
> 
> Anne
> 
> -- 
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> Anne Wilson                   UCAR Unidata Program            
> address@hidden                       P.O. Box 3000
>                                         Boulder, CO  80307
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