Delta Airlines began cancelling thousands of its flights on Wednesday, April 5, 2017, blaming the resulting delays on thunderstorms at its Atlanta hub (https://www.nytimes.com/2017/04/07/business/delta-flights-canceled.html). The airline still has not recovered as of Saturday, April 8 — already this morning, Delta has cancelled another 275 flights.
The resulting chaos at airports has been extensively documented in a flyertalk thread (http://www.flyertalk.com/forum/delta-air-lines-skymiles/1834788-april-5-2017-delta-cancels-300-flights-due-thunderstorm.html). The thread contains pictures of people sleeping on airport floors, reports of 20-40 hour call wait times, and claims that Delta's crew-scheduling computers have crashed. In a thread at Airline Pilot Forums (http://www.11alive.com/news/local/long-lines-reported-saturday-morning-at-atlanta-airport/429759800), Delta employees are posting about waiting for work and not being called in.
(Score: 2) by Nerdfest on Sunday April 09 2017, @07:18PM
If it's big and there's an outage, IBM is almost guaranteed to be involved, likely with one of their lovely mainframes. Good reliable hardware, but historically running OSes that seem to actually *encourage* user error. The only way to actually keep their uptimes as good as they can be is to never change anything, the mainframe motto.
Not that I'm bitter.