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Comment by film42 | Hacker News Reader

I think AWS will need to update their documentation to communicate this. Will a snapshot isolation fix introduce a performance regression in latency or throughput? Or, maybe they stand by what they have as being strong enough. Either way, they'll need to say something.

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I think the ideal solution from AWS would be fixing the bug and actually providing the guarantees that the docs say that they do.

I agree, but I have a feeling this isn't a small fix. Sounds like someone picked a mechanism that seemed to be equivalent but is not. Swapping that will require a lot of time and testing.

> Swapping that will require a lot of time and testing.

Lucky them, there is an automated suite[1] to verify the correct behavior :-D

1: https://github.com/jepsen-io/rds

Yet bellow your comment is a quote that this is since v13 and above is a comment that there is no mention in the docs.

Using the words Bug and guarantee is throwing the casual readers off the mark ?

there is no trivial fix for this without breaking performance. roughly, there is no free lunch in distributed systems, and AWS made a tradeoff to relax consistency guarantees for that specific setup, and didn't really advertise that

It looks like a bug, but the problem is the documentation does not detail what guarantees are offered in this scenario, but would love if somebody could point me where it does...

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