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Do you have any fact that support your claim?

The way Google deploys applications is fundamentally different than the model they expose to customers. Google's cloud platform runs on top of their real resource management system, not the other way around.

Amazon didn't run entirely on AWS until four years after AWS was created: https://twitter.com/cvwadored/status/81400058624475136

I worked there in 2011 and I'm pretty sure not everything was on AWS at that time.

I don't know how to square that with the tweet: my own understanding could be wrong, or it could be a misleading stat like 100% of public traffic hits a server on AWS infrastructure but not all of the other backend services were.

The Q4 peak hardware purchase graphs Amazon retail present. Different stacks.

Have you ever seen an AWS outage line up with an Amazon retail outage?

Dogfooding is a myth - Amazon retail's not betting its business on AWS.

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