revertts · HackerTrans

3 года назадdiscuss

I think you’re understating how many quic implementations exist. Google, Apple, F5, Facebook, Fastly, Cloudflare, Microsoft, AWS all have separate implementations servicing significant production traffic, most of them open source. That doesn’t even count the smaller, language-specific implementations. Searching for quic interop tests is a good way to discover the various implementations.

revertts

4 года назадdiscuss

Failures while communicating to the external systems (the kv store and elastic in your example) are usually where this falls down. It's easy to build a system that's consistent ~90% of the time, but if you want to build a system where things like failures during snapshot write or failures during export to elastic are handled properly it starts getting complex (you will need to find ways to recover and retract data, or build smarts into the consumer to query around aborts, or find a way to do a 2PC-esque dance with the external system a la Kafka's transaction support, etc.). Getting to full consistency isn't easy.

revertts

4 года назадdiscuss

It's very hard for Kafka Connect plugins to maintain consistency in all scenarios - both because of the semantics of some upstream databases, and because of the guarantees the connect API itself offers. Hopefully KIP-618 will eliminate more of the edge cases though.

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