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Its the same design. Actually, S3 is easier, because of the bigger scale, making it easier to support high perf.

The bigger the scale the easier it is to support high perf on HDDs.

I worked on S3. It's not.

I'm too lazy to find the slide deck from AWS CTO where he explained it, the bigger the total scale the easier it was to support bursting workloads by spreading chunks of data across the whole fleet of disks.

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