20020908: mystery on atm, please comment

>From:  yoksas <address@hidden>
>Organization:  UCAR/Unidata
>Keywords:  200209071919.g87JJtj16814 LDM NIMAGE atm

Hey,

OK, so I feel like I am losing my mind.  Friday afternoon, I commented
out the allow for NIMAGE in atm's ldmd.conf file, and then I stopped
the LDM and waited for a couple of minutes while I watched the load
average on thelma.  After noticing that it wasn't going down, I restarted
the LDM on atm.  Jeff was standing there so he should be able to
verify this.  My natural assumption was that feedme requests from
ldm.meteo.psu.edu would then be denied, so I didn't bother to watch
the LDM log file to see if ldm.meteo.psu.edu would connect up.

A quick look at the ldmd.log file on atm this morning showed me that
ldm.meteo.psu.edu IS feeding NIMAGE from atm.  I verified this with a
notifyme from shemp:

/local/ldm% notifyme -vxl- -f NIMAGE -h ldm.meteo.psu.edu -o 3600
Sep 08 14:52:03 notifyme[6644]: Starting Up: ldm.meteo.psu.edu: 
20020908135203.259 TS_ENDT {{NIMAGE,  ".*"}}
        NOTIFYME(ldm.meteo.psu.edu) returns OK
Sep 08 14:52:03 notifyme[6644]: NOTIFYME(ldm.meteo.psu.edu): OK
Sep 08 14:52:03 notifyme[6644]: cdbf7e4c6f7560ec76ed1c2046fb65f7 12118349 
20020908135753.683  NIMAGE 141171  sat/ch1/GOES-8/VIS/20020908 
1345/EAST-CONUS/1km/ TIGE01 KNES 081345
Sep 08 14:52:03 notifyme[6644]: 44e53527570c58c34e5fdf2eb23fabb4   739660 
20020908135803.977  NIMAGE 141172  sat/ch1/GOES-8/3.9/20020908 
1345/EAST-CONUS/4km/ TIGE04 KNES 081345

I then verified that I did, in fact, comment out the allow on atm:

atm.geo.nsf.gov.ldm> date
Sun Sep  8 10:57:50 EDT 2002

atm.geo.nsf.gov.ldm> ls -lt ldmd.conf
-rw-rw-r--   1 ldm      ustaff      4048 Sep  6 18:45 ldmd.conf

atm.geo.nsf.gov.ldm> grep psu ldmd.conf
allow ANY-NLDN-WSI ihlseng.ugems.psu.edu
#allow NIMAGE       ^[a-z].*\.meteo\.psu\.edu$    # Penn State University

I then checked to make sure that ihlseng.ugems.psu.edu does not resolve
to ldm.meteo.psu.edu:

atm.geo.nsf.gov.ldm> nslookup ihlseng.ugems.psu.edu
Server:  twister.nsf.gov
Address:  198.181.231.17

*** twister.nsf.gov can't find ihlseng.ugems.psu.edu: Non-existent host/domain


So, ldmd.conf was modified at 18:45 (6:45 pm eastern time; 4:45 mountain
time) as it should have been.

Next, I looked at the LDM log file to make sure that I had stopped and
restarted the LDM:

atm.geo.nsf.gov.ldm> less ldmd.log
Sep  6 18:48:45 atm.geo.nsf.gov ldm: [ID 702911 local0.info] LDM Start (login 
name, tty, login time, [from]): ldm        pts/1        Sep  6 13:53      
(shemp.u

This line shows that 'ldm' started the LDM at 18:48:45 (6:48:45 pm) on
Friday.  This was done AFTER ldmd.conf was modified.

So how in the world is ldm.meteo.psu.edu feeding NIMAGE from atm?

Anne, given that NIMAGE has been fed to ldm.meteo.psu.edu right along,
all comments/specualtions about whether the NIMAGE feed has pushed Penn
State over the edge are invalid.

I am bewildered to say the least!

Tom
--
+-----------------------------------------------------------------------------+
* Tom Yoksas                                             UCAR Unidata Program *
* (303) 497-8642 (last resort)                                  P.O. Box 3000 *
* address@hidden                                   Boulder, CO 80307 *
* Unidata WWW Service                             http://www.unidata.ucar.edu/*
+-----------------------------------------------------------------------------+