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A comment on Cooling related failure (in Google London DC). Parent comment

Re:Cooling related failure (in Google London DC) by cshou on Wednesday July 20, 2022 @10:08AM (#32166003)
IIUC, HA setting only failover across *zones in the same region*. If the whole region is down, HA won’t be helpful. In this case, the London data center is the region.
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Re:Cooling related failure (in Google London DC) by giggsey on Wednesday July 20, 2022 @10:53AM (#32166588)
The region wasn't down though. Only one zone was down?

From earlier in the incident history:

> Cloud SQL:

> Impact/Diagnosis: Non-HA instances backed by europe-west2-a are hard-down in europe-west2-a. HA instances that were in europe-west2-a when the incident started, are down with stuck failovers.

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