This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
>From: William C Klein <address@hidden> >Organization: Valparaiso >Keywords: 200207191908.g6JJ8H908347 data feeds Bill, >Here is the ldmd.conf: > ># Start necessary LDM processes >exec "/home/ldm/decoders/xcd_run MONITOR" >exec "pqact" >exec "pqact -f NNEXRAD /home/ldm/etc/pqact.nexrad" >exec "pqbinstats" > ># Request UNIDATA -> DDPLUS, IDS, HRS, MCIDAS ># ># 20020208 - Split feed request to squall (TCY - Unidata) ># >#request DDPLUS|IDS|DIFAX|FSL2 ".*" squall.atmos.uiuc.edu >#request MCIDAS|HRS ".*" 128.174.80.44 >request DDPLUS|IDS|DIFAX|FSL2 ".*" papagayo.unl.edu >request MCIDAS|HRS ".*" 129.93.52.150 > ># Request ALL NEXRAD products from ALL NEXRAD sites >request NNEXRAD "/p...(GRB|MKX|LOT|ILX|GRR|IWX|IND|LVX|DTX|ILN|PAH|HPX)" >flood >.atmos.uiuc.edu > ># Request all NEXRAD products from the NEXRAD floater sites ># request FNEXRAD ".*" flood.atmos.uiuc.edu > ># Request Lightning data from SUNY >request NLDN ".*" striker.atmos.albany.edu > ># Allow LDM access to the local host and any machine at Unidata (for ># troubleshooting purposes) >allow ANY >^((localhost|loopback)|(127\.0\.0\.1\.?$)|([a-z].*\.unidata\.ucar\.edu >\.?$)) OK, so it looks like your ldmd.conf file was also setup to possibly get data from squall.atmos.uiuc.edu. You can check to see that squall will allow you to request data using the notifyme execution as in other cases: notifyme -vxl- -o 3600 -f ANY -h squall.atmos.uiuc.edu If this shows data like the notifyme to ldm.meteo.psu.edu did, you can feed from squall. >*-*-*-*-* > >I'm not seeing a request like: > >request UNIDATA ".*" bar.bar.edu UNIDATA represents a collection of feeds: UNIDATA == WMO|MCIDAS WMO == DDPLUS|IDS|HRS therefore: UNIDATA == DDPLUS|IDS|HRS|MCIDAS DIFAX is its own, separate feed. >Is that due to the split that was made earlier this year (see comments >above)? Yes. The split made before combined the feed of DDPLUS, IDS, DIFAX, and FSL2 into one and MCIDAS and HRS into another. >And if so, then can I just comment out the papagayo line and add >the psu for those items listed? Yes. If you are allowed to feed from squall.atmos.uiuc.edu, you could also just comment out the papagayo lines and uncomment the squall lines: #request DDPLUS|IDS|DIFAX|FSL2 ".*" papagayo.unl.edu #request MCIDAS|HRS ".*" 129.93.52.150 request DDPLUS|IDS|DIFAX|FSL2 ".*" squall.atmos.uiuc.edu request MCIDAS|HRS ".*" 128.174.80.44 This would be the absolute quickest way of getting back up. If you decide to take the route of leaving commented lines for feeds from different machines in your ldmd.conf file, then I would recommend adding commented lines for ldm.meteo.psu.edu: #request DDPLUS|IDS|DIFAX|FSL2 ".*" papagayo.unl.edu #request MCIDAS|HRS ".*" 129.93.52.150 #request DDPLUS|IDS|DIFAX|FSL2 ".*" ldm.meteo.psu.edu #request MCIDAS|HRS ".*" 128.118.28.12 request DDPLUS|IDS|DIFAX|FSL2 ".*" squall.atmos.uiuc.edu request MCIDAS|HRS ".*" 128.174.80.44 Once the changes are made (with no typos), you should be able to simply stop and restart the LDM: ldmadmin stop <wait until all LDM processes exit> ldmadmin start If the 'ldmadmin start' hangs (i.e., you don't get the Unix prompt back), it means that you have a typo in ldmd.conf. Tom