Apache Pulsar
Apache Pulsar is an open-source, distributed messaging and streaming platform designed for high performance, scalability, and durability. It provides a unified model for both pub-sub messaging and queuing, with features like multi-tenancy, geo-replication, and tiered storage. Pulsar is built to handle real-time data streams and event-driven applications across cloud environments.
Developers should learn Apache Pulsar when building large-scale, real-time data pipelines, IoT systems, or financial applications requiring low-latency messaging and strong consistency. It is ideal for use cases like log aggregation, microservices communication, and streaming analytics where high throughput and fault tolerance are critical, especially in multi-tenant or geo-distributed deployments.