Good question. They are now saying that the outage was due to a corrupted file, which was corrupt on the backup as well. This may be capable of corrupting the operation of even a redundant system, if it is part of critical common data used by the shared systems. Furthermore, in order to handle the load the NOTAM system is almost certainly implemented on multiple processors with load-sharing, which means it already IS redundant. The days of a system like this being a single "mainframe" handling all the queries and needing a second system to backstop it in case of failure are gone.
@@LexipMedia I'm familiar with federal government run computer systems. Budget battles and contracting limits can lead to cost cutting, jerry-rigging, and lack of OS, software and hardware updates.
Yep - as I also stated in the video! The outage was caused by a corrupted file both in their primary and backup system (which is typically built as redundancy) but they were required to bring both offline to resolve the issue. Now, there are other systems that exist but they are not integrated into the commercial airline system as they are with the military, etc.
Great analogy used for understanding NOTAM’s for those that don’t know what they are.
Thank you!!
If the NOTAM system is so critical, why no redundancies?
Good question. They are now saying that the outage was due to a corrupted file, which was corrupt on the backup as well. This may be capable of corrupting the operation of even a redundant system, if it is part of critical common data used by the shared systems. Furthermore, in order to handle the load the NOTAM system is almost certainly implemented on multiple processors with load-sharing, which means it already IS redundant. The days of a system like this being a single "mainframe" handling all the queries and needing a second system to backstop it in case of failure are gone.
@@LexipMedia I'm familiar with federal government run computer systems. Budget battles and contracting limits can lead to cost cutting, jerry-rigging, and lack of OS, software and hardware updates.
Yep - as I also stated in the video! The outage was caused by a corrupted file both in their primary and backup system (which is typically built as redundancy) but they were required to bring both offline to resolve the issue. Now, there are other systems that exist but they are not integrated into the commercial airline system as they are with the military, etc.