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> 1. When aws deploys changes they run through a pipeline which pushes change to regions one at a time. This is true. > Most services start with us-east-1 fir
by iLoveOncall 1y ago
> 1. When aws deploys changes they run through a pipeline which pushes change to regions one at a time.
This is true.
> Most services start with us-east-1 first.
This is absolutely false. Almost every service will FINISH with the largest and most impactful regions.
- captainkrtek 1y agoAgreed. Most services start deployments on a small number of hosts in single AZs in small less-known regions, ramping up from there. In all my years there I don’t recall “us-east-1 first”.
- riknos314 1y agoEach AWS service may choose different pipeline ordering based on the risks specific to their architecture. In general: You don't deploy to the largest region first because of the large blast radius. You may not want to deploy to the largest region last because then if there's an issue that only shows up at that scale you may need to roll every single region back (divergent code across regions is generally avoided as much as possible). A middle ground is to deploy to the largest region second or third.