Re:Major AWS Outage Happening
by barbazoo on Monday October 20, 2025 @10:43PM
(#45651900)
Wow, you really *have* to exercise the region failover to know if it works, eh? And that confidence gets weaker the longer itβs been since the last failover I imagine too. Thanks for sharing what you learned.
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Re:Major AWS Outage Happening
by ej_campbell on Monday October 20, 2025 @11:33PM
(#45652190)
That wouldn't have even caught that, most likely unless they verified they had no incidental tie ins with us-east-1.
You should assume it will not work unless you test it regularly. That's a big part of why having active/active multi-region is attractive, even though it's much more complex.
The last place I worked actively switched traffic over to the backup nodes regularly (at least monthly) to ensure we could do it when necessary.
We learned that lesson by having to do emergency failovers and having some problems. :)