Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
All, A test of the AWIPS Network Control Facility (NCF) backup servers has been scheduled by the NWS for 15:15 UTC this coming Wednesday, May 19. The announcement of the test, broadcast in NOAAPort and relayed to users subscribed to our nws-changes@xxxxxxxxxxxxxxxx email list, is included at the end of this email for your review. Those of you subscribed to this list who are operating NOAAPort ingest systems using the Unidata 'noaaport' package will be aware that the past several tests of the NCF backup servers have resulted in "corruption" of some nwstg2 GRIB2 messages (typically multiple GRIB2 messages were sent as a single product). Some of the products have been seen to cause 'noaaport's processing routine 'readnoaaport' to exit with error, and this, in turn has led to the LDM running on the ingest machine exiting. The NOAAPort ingest machines run by the UPC have been instrumented to monitor data ingest, and restart the LDM upon unintended exit. Code modifications and GRIB2 table updates made by Steve Chiswell (DOE/Savannah River National Laboratory) have been included in a new, ** TEST ** release of our 'noaaport' ingest package, noaaport-1.4.0.tar.gz. This release is available by FTP as follows: machine: ftp.unidata.ucar.edu user: anonymous pass: <your full email address> directory: pub/noaaport file: noaaport-1.4.0.tar.gz Please be aware of the following changes to the code and their possible impact on you and/or your users: 1) product bulletin sizes are compared to decoded GRIB lengths to trap and prevent overruns (the cause of problems see in the current release) 2) SDUS8 products are being moved from HDS to NEXRAD3 This allows future dual-polarization products to be included in the NEXRAD3 datastream, and it will cause the SDUS DPA products to move from the HDS to NEXRAD3 datafeeds. Implication: You, and/or users who feed from you may have LDM pattern-action file actions that process DPA products from HDS. After the new code is up and running, sites using the DPA products will need to modify their setups to process the DPA products from the NEXRAD3 feed. 3) the g2clib library bundled with 'noaaport' was updated to version 1.2.0 to add the WAFS (thinned grids) coming in the near future 4) GRIB2 decoding tables were updated for new levels and parameters 5) an argument was added to 'dvbs_multicast' to specify the multicast interface (in case a static route is needed instead of the default route) 6) readnoaaport-1.4, like its predecessors, uses LDM configuration files for its build. readnoaaport-1.4 has been tested with LDM-6.8.x only. It is not expected to work with very old LDM installations, and it is known to NOT build on systems where the new test LDM-6.9.x is installed. The build setup for noaaport-1.4 will need to be updated to work with LDM-6.9.x. Until a new release of noaaport is made, you are advised to continue using LDM-6.8.1. NB: Because of 2) above, we are requesting that sites running NOAAport ingest systems whose output is fed into the IDD wait until the late afternoon or evening of Tuesday, May 18 to transition to the new code. On Monday, May 14 an email will be sent to the ldm-users@xxxxxxxxxxxxxxxx email list notifying IDD participants of the impending change and advising them of the action(s) that they will need to take to minimize impacts to their data processing. Please relay this message to folks you know are running the Unidata NOAAPort ingest package but not subscribed to this list. Please direct questions/comments to support-noaaport@xxxxxxxxxxxxxxxx. Cheers, Tom Yoksas Unidata User Support The following is the NWS announcement of the NCF backup test: 196 NOUS72 KNCF 141548 ADMNCF . PLEASE PASS TO THE MIC/HIC, SOO, ESA, ITO AND AFP: . THERE WILL BE AN OPERATIONAL TEST OF THE AWIPS NETWORK CONTROL FACILITY (NCF) BACKUP SERVERS. NCF SERVER OPERATIONS WILL BE SWITCHED FROM THE PRIMARY AWIPS NCF (ANCF) IN SILVER SPRING, MD TO THE BACKUP NCF (BNCF) AT FAIRMONT, WV. THE SWITCH IS SCHEDULED FOR WEDNESDAY, 19 MAY AT 1515 UTC. OPERATIONS WILL BE SWITCHED BACK TO THE PRIMARY NCF ON THURSDAY, 20 MAY AT 1515 UTC. THE SWITCH WILL NOT BE DONE ON A CRITICAL WEATHER DAY, OR IF THERE ARE OTHER SIGNIFICANT OPERATIONAL ISSUES WARRANTING POSTPONEMENT. . ALL ANCF MESSAGE DISTRIBUTION WILL BE REPOINTED TO THE BNCF. THE SWITCH TO THE BNCF WILL BEGIN AT 1515 UTC AND WILL TAKE ABOUT 20 MINUTES. DATA WILL QUEUE WHILE THE SWITCH IS IN PROGRESS AND WILL BE SENT ONCE THE SWITCH IS COMPLETE. THIS WILL AFFECT DATA ORIGINATING AT NWS FIELD OFFICES AND NATIONAL CENTERS ON THE AWIPS NETWORK INCLUDING RADAR DATA. . REPOINTING OF OPERATIONS BACK TO THE ANCF WILL ALSO TAKE ABOUT 20 MINUTES DURING WHICH DATA WILL BE QUEUED. QUEUED DATA WILL BE SENT WHEN THE REPOINTING IS COMPLETE. . NCF -- ********************************************************************** < Unidata User Support UCAR Unidata Program < (303)497-8643 P.O. Box 3000 < support@xxxxxxxxxxxxxxxx Boulder, CO 80307 < ---------------------------------------------------------------------- < Unidata Web Support http://www.unidata.ucar.edu/support < ********************************************************************** <
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