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Re #1 I don’t think Amazon charges for data transfers from within AWS, assuming Kafka is hosted there.


There are per-API-call charges. It's just not per-byte.


(WarpStream founder) Exactly, and we designed WarpStream's storage system to minimize the number of object storage API calls it has to make while still maintaining relatively low latency (P99 of ~1s end-to-end)


S3 requests are paid regardless of source (tldr GETs are cheaper than PUTs). You're confused with data transfer within a VPC.




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