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A Cloud Region Is a Priced, Capacity-Limited Physical Place

Region choice silently sets price, launch success and data-transfer cost - three of the ways a run fails the outcome. It is also the concept that makes the capacity and egress nodes intelligible, so it belongs near the entry floor.

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Limiting Failure Blast Radius with AWS Availability Zones and Regions

Blast radius is the extent of a system affected by the failure of any one component, and cloud architecture manages it by partitioning infrastructure into failure domains that share no power, network…