I think because the product batches messages which could be for different topics.
-Dave -----Original Message----- From: Nicolas MOTTE [mailto:nicolas.mo...@amadeus.com] Sent: Wednesday, March 8, 2017 2:41 PM To: users@kafka.apache.org Subject: Performance and Encryption 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 This e-mail and any files transmitted with it are confidential, may contain sensitive information, and are intended solely for the use of the individual or entity to whom they are addressed. If you have received this e-mail in error, please notify the sender by reply e-mail immediately and destroy all copies of the e-mail and any attachments.
