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Not to mention that Kubernetes is nowhere near as scalable as Borg. I doubt Google runs anything on Kubernetes.

They prob do since they have GKE, you know... eat your own food and stuff.

I doubt they do, if they did it would be in all kinds of marketing articles like so and so Google team used GKE to solve some problem. AWS has so many articles about Amazon using AWS for internal work. Microsoft also has many on Azure. I can't find any usage of GKE by google internally.

No they don't. Google internally uses Borg. Heck even managed Google Cloud Run in GCP runs on top of Borg.

Source for this?

Have several friends working in Google. Would be happy to learn otherwise.

For the scalability bit, see the limits here:

https://kubernetes.io/docs/setup/best-practices/cluster-larg...

Borg has much higher limits from what I remember from the borg paper.

Thanks

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