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How do you scale based on bandwidth read and write estimates?

I understand the need to compute bandwidth estimation but it’s not tangible to me how these estimates are then used for the scalable design given.

Like if we have a read bandwidth of 200MB/s and a write bandwidth of 35GB/s, how do you determine how many servers you will need to load balance? Or that you will need a load balancer? Or a cluster of load balancers? Yeah I get that 35GB/s is a ton of data but how much data can a single server to take reading/ writing?


Course: https://www.educative.io/collection/5668639101419520/5649050225344512
Lesson: https://www.educative.io/collection/page/5668639101419520/5649050225344512/5668600916475904