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Re: ldm feed

Bill,

On Fri, 25 Aug 2000 address@hidden wrote:

> Thank you very much.  Pardon me, as I am not very good either with network
> problems or operational met. jargon, but, FWIW, the last surface data we got
> today was 13Z.  Yesterday we got up to 15Z, then nothing 'til I went home at 
> 5:30.

I think yesterday's problem was some sort of trouble coming out of NCAR.
Today looks pretty snappy into our system (only a minute or two delay).

> The MCIDAS feed seems to come in all right...we have the 18Z radar composite, 
> for
> example, 17Z VIS and IR.

Yesterday's problem only affected data DDPLUS and HRS type stuff, so
MCIDAS, etc... was okay.  That's a bit odd for today, however, since we
seem to be getting things fine today (unless it just improved in the last
few hours).

> Oh yeah, we're back in school, and that frequently impacts our data response. 
>  In the
> past, though, outgoing traceroutes have disclosed the problem.  Of course, 
> there's 
> always something new.

I checked with our network folks... they say there are not network
problems here at the moment.  They tracerouted your site and say the
responses on this end are nominal but noticed a slight tendency for longer
times at more.net (your ISP?).  Could you check with your network people
or ISP and see if they are having any problems?  It did a bunch of pings
to nimus and cirrus and they vary a lot in lost packets ranging from 0% to
about 25%.  It may turn out simply to be a slow pipe somewhere between
here and there which will come down to beating on an ISP somewhere to fix
it.

FYI, here's the traceroute I did:

navier# traceroute cirrus.smsu.edu
traceroute to cirrus.smsu.edu (146.7.97.225), 30 hops max, 40 byte packets
 1  128.118.28.1 (128.118.28.1)  1.982 ms  1.787 ms  1.722 ms
 2  dkbln-1-fre2-rtvlan.ems.psu.edu (128.118.64.1)  1.052 ms  0.586 ms
0.556 ms
 3  Willard1-ATM8-0.2.gw.psu.edu (172.28.20.1)  0.942 ms  1.141 ms  0.866
ms
 4  Telecom2-ATM5-0-0.1.gw.psu.edu (128.118.44.5)  3.376 ms  2.597 ms
3.096 ms
 5  nss5-penn-state-h10-0.psc.net (192.88.115.89)  6.445 ms  6.477 ms
6.031 ms
 6  12.127.244.61 (12.127.244.61)  36.457 ms  22.728 ms  23.611 ms
 7  gbr2-a30s1.n54ny.ip.att.net (12.127.0.10)  21.554 ms *  21.765 ms
 8  gbr3-p00.n54ny.ip.att.net (12.122.5.246)  19.399 ms  23.064 ms  21.629
ms
 9  gbr3-p30.wswdc.ip.att.net (12.122.2.166)  30.971 ms * *
10  gbr3-p40.sl9mo.ip.att.net (12.122.2.82)  53.122 ms  53.576 ms *
11  gbr2-p60.sl9mo.ip.att.net (12.122.1.245)  45.871 ms  45.968 ms  46.810
ms
12  ar1-a3120s2.sl9mo.ip.att.net (12.127.4.9)  47.081 ms  50.221 ms
47.150 ms
13  12.127.112.202 (12.127.112.202)  68.209 ms  61.941 ms  65.426 ms
14  sp-r12-01-atm0-0-103.mo.more.net (150.199.7.97)  59.658 ms  59.172 ms
63.572 ms
15  SMSU-ATM2-0.gw.more.net (150.199.235.250)  66.520 ms  59.433 ms
53.289 ms
16  London.smsu.edu (146.7.4.6)  54.785 ms  52.749 ms  59.511 ms
17  * cirrus.smsu.edu (146.7.97.225)  62.154 ms  71.193 ms


I'll continue to monitor and see if I can come up with any other ideas.

Now that I'm thinking about it... have you checked your machine to make
sure there are no run-away processes on it that might be slowing it down
and preventing it from keeping up with the data?  That's worth checking if
you haven't.

Let me know if I can help further.


                                           Art.

Arthur A. Person
Research Assistant, System Administrator
Penn State Department of Meteorology
email:  address@hidden, phone:  814-863-1563