Nicholas, this appears to be a duplicate of your question from 2 days ago. Please review that for discussion on this question.
-Todd On Wed, Mar 8, 2017 at 1:08 PM, Tauzell, Dave <dave.tauz...@surescripts.com> wrote: > 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. > > -- *Todd Palino* Staff Site Reliability Engineer Data Infrastructure Streaming linkedin.com/in/toddpalino
