Project Metamorphosis: Unveiling the next-gen event streaming platformLearn More

Everything You Always Wanted to Know About Kafka’s Rebalance Protocol but Were Afraid to Ask

Apache Kafka® is a scalable streaming platform with built-in dynamic client scaling. The elastic scale-in/scale-out feature leverages Kafka’s “rebalance protocol” that was designed in the 0.9 release and improved ever since then. The original design aims for on-prem deployments of stateless clients. However, it does not always align with modern deployment tools like Kubernetes and stateful stream processing clients, like Kafka Streams. Those shortcomings lead to two major recent improvement proposals, namely static group membership and incremental rebalancing.

This talk provides a deep dive into the details of the rebalance protocol, starting from its original design in version 0.9 up to the latest improvements and future work.

We discuss internal technical details, pros and cons of the existing approaches, and explain how you configure your client correctly for your use case. Additionally, we discuss configuration tradeoffs for stateless, stateful, on-prem, and containerized deployments.

<<Back

Sign Up Now

Start your 3-month trial. Get up to $200 off on each of your first 3 Confluent Cloud monthly bills

New signups only.

By clicking “sign up” above you understand we will process your personal information in accordance with our Privacy Policy.

By clicking "sign up" above you agree to the Terms of Service and to receive occasional marketing emails from Confluent. You also understand that we will process your personal information in accordance with our Privacy Policy.

Free Forever on a Single Kafka Broker
i

The software will allow unlimited-time usage of commercial features on a single Kafka broker. Upon adding a second broker, a 30-day timer will automatically start on commercial features, which cannot be reset by moving back to one broker.

Select Deployment Type
Manual Deployment
  • tar
  • zip
  • deb
  • rpm
  • docker
or
Auto Deployment
  • kubernetes
  • ansible

By clicking "download free" above you understand we will process your personal information in accordance with our Privacy Policy.

By clicking "download free" above, you agree to the Confluent License Agreement and to receive occasional marketing emails from Confluent. You also agree that your personal data will be processed in accordance with our Privacy Policy.

This website uses cookies to enhance user experience and to analyze performance and traffic on our website. We also share information about your use of our site with our social media, advertising, and analytics partners.