I believe these are defaults you can set at the broker level so that if the topic doesn’t have that setting set, it will inherit those But you can definitely override your topic configuration at the topic level
On 9 March 2017 at 7:42:14 am, Nicolas Motte (lingusi...@gmail.com) wrote: Hi everyone, I have another question. Is there any reason why retention and cleanup policy are defined at cluster level and not topic level? I can t see why it would not be possible from a technical point of view... 2017-03-06 14:38 GMT+01:00 Nicolas Motte <lingusi...@gmail.com>: > 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 > >
