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726 NOUS72 KNCF 141950 ADMNCF SUBJECT: DATA INTERRUPTIONS DURING AWIPS NCF UPGRADE ON WEDNESDAY AND THURSDAY, 15-16 DECEMBER, THE AWIPS NCF WILL BE UNDERGOING SOFTWARE UPGRADES THAT WILL AT TIMES AFFECT AWIPS SATELLITE BROADCAST NETWORK (SBN) TRANSMISSIONS AND AWIPS WAN TRAFFIC. THE GENERAL SCHEDULE IS AS FOLLOWS: . WED 15 DEC: SBN UPLINK PACKAGE WILL BE UPGRADED. THIS WILL REQUIRE TWO, SIMULTANEOUS INTERRUPTIONS OF ALL FOUR SBN CHANNELS. THE FIRST INTERRUPTION WILL OCCUR WHILE PLACING THE UPLINK PACKAGE ON A STAGING DATA SERVER AND THE SECOND WILL OCCUR WHEN MOVING THE UPLINK PACKAGE BACK TO THE PRIMARY AND SECONDARY SERVERS. EACH INTERRUPTION WILL BE OF LESS THAN 30 MINUTES DURATION, AND WILL OCCUR 1 TO 2 HOURS APART. SATELLITE IMAGERY FOR THE DOWN PERIODS WILL NOT BE AVAILABLE, HOWEVER, ALL DATA ON THE NWSTG CHANNEL WILL BE QUEUED FOR TRANSMISSION WHEN SERVICE IS RESTORED. NO NWSTG DATA SHOULD BE LOST. . THU 16 DEC: MESSAGE HANDLING SYSTEM (MHS) WILL BE UPGRADED. THE MHS UPGRADE WILL REQUIRE TWO INTERRUPTIONS OF MESSAGE TRAFFIC ON THE AWIPS WAN. THESE INTERRUPTIONS WILL OCCUR AS THE MHS IS MOVED TO AND FROM THE STAGING SERVER. EACH INTERRUPTION WILL BE APPROXIMATELY 5 MINUTES IN DURATION AND WILL OCCUR 4 HOURS APART. THE AWIPS OPERATIONAL MODE (AOM) SITES HAVE BEEN CONFIGURED SUCH THAT THEIR OUTGOING WAN DATA WILL BE QUEUED AT THE SITES UNTIL MHS IS RESTARTED AT THE NCF. . THE NCEP SDM AND NWS/OSO WILL PROVIDE FINAL AUTHORIZATION TO PROCEED WITH THE NCF UPGRADE, PROVIDING THAT NO SIGNIFICANT WEATHER IS PROJECTED DURING THE PLANNED WORK PERIODS. . ADDITIONAL MESSAGES WILL BE SENT TO AWIPS FIELD SITES JUST PRIOR TO THE START OF EACH DAY'S ACTIVITY, AND AGAIN UPON COMPLETION OF EACH DAY'S ACTIVITY. ---------- End Forwarded Message ----------
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