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Pulsar Overview

Pulsar is a multi-tenant, high-performance solution for server-to-server messaging. Originally developed by Yahoo, Pulsar is under the stewardship of the Apache Software Foundation.

Key features of Pulsar are listed below:

  • Native support for multiple clusters in a Pulsar instance, with seamless geo-replication of messages across clusters.
  • Very low publish and end-to-end latency.
  • Seamless scalability to over a million topics.
  • A simple client API with bindings for Java, Go, Python and C++.
  • Multiple subscription types (exclusive, shared, and failover) for topics.
  • Guaranteed message delivery with persistent message storage provided by Apache BookKeeper.
  • A serverless light-weight computing framework Pulsar Functions offers the capability for stream-native data processing.
  • A serverless connector framework Pulsar IO, which is built on Pulsar Functions, makes it easier to move data in and out Apache Pulsar.
  • Tiered Storage offloads data from hot/warm storage to cold/long-term storage (such as S3 and GCS) when the data is aging out.

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