Hi everyone, I understand one of the reasons why Kafka is performant is by using zero-copy.
I often hear that when encryption is enabled, then Kafka has to copy the data in user space to decode the message, so it has a big impact on performance. If it is true, I don t get why the message has to be decoded by Kafka. I would assume that whether the message is encrypted or not, Kafka simply receives it, appends it to the file, and when a consumer wants to read it, it simply reads at the right offset... Also I m wondering if it s the case if we don t use keys (pure queuing system with key=null). Cheers Nico
