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< NVMe read latency is in the 10-100µs range for 128kB blocks. S3 is about 100ms. That's 3-4 OOMs.

Aren't you comparing local in-process latency to network latency? That's multiple OOM right there.



No, within the same DC network latency does not add that much. After all EFS also manages 600µs average latency. It's really just S3 that's slow. I assume some large fraction of S3 is spread over HDDs, not SSDs.




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