We are excited to announce the release of Apache Pulsar 4.0, the second Long-Term Support (LTS) version after the successful introduction of LTS with

Announcing Apache Pulsar™ 4.0: Towards an Open Data Streaming Architecture

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2024-10-25 01:00:06

We are excited to announce the release of Apache Pulsar 4.0, the second Long-Term Support (LTS) version after the successful introduction of LTS with Pulsar 3.0 in May 2023. Pulsar 4.0 represents a pivotal step forward in our mission to make data streaming more accessible, affordable, and scalable. With a focus on modularity, observability, scalability, and security, this release extends Pulsar advantages for enterprise deployments, which necessarily emphasize this release’s enhanced Quality of Service (QoS) controls. With an ongoing trend towards simplicity and flexibility in data streaming today, this release drives Pulsar closer to becoming the foundation of an Open Data Streaming Architecture.

In this post, we’ll explore the key areas of innovation in Pulsar 4.0 and the Pulsar Improvement Proposals (PIPs) that have been instrumental in shaping this release.

From the start, Pulsar was designed with modularity as a core principle. This philosophy has guided our contributors and committers as they continuously enhance the project to make data streaming available and accessible for organizations of all sizes. The modular architecture allows organizations to opt for deployment models that align with their specific security and infrastructure requirements. Over multiple releases, the Apache Pulsar community has transformed every layer of the Pulsar system—including metadata storage, data storage, protocol handling, and load balancing—into fully pluggable components. This flexibility fosters rapid innovation and allows Pulsar to adapt to the ever-changing demands of IT infrastructure.