Apache Pulsar
Apache Pulsar is an open-source distributed pub-sub messaging system originally created by Yahoo and now under the Apache Software Foundation. It is horizontally scalable, provides low latency and durable storage for messages.
pubsub
messaging
distributed-systems
low-latency
durable-storage
Apache Pulsar: Open-Source Pub-Sub Messaging System
Apache Pulsar is an open-source distributed pub-sub messaging system originally created by Yahoo and now under the Apache Software Foundation. It is horizontally scalable, provides low latency and durable storage for messages.
What is Apache Pulsar?
Apache Pulsar is an open-source distributed pub-sub messaging system originally created by Yahoo and now under the Apache Software Foundation. It has the following key features:
- Horizontally scalable to millions of topics and messages per second
- Persistent message storage with tiered storage options for historical data access
- Low publish and end-to-end latency for messaging
- Message delivery guarantees like at-least-once or exactly-once
- Multiple subscription modes like exclusive, shared and failover
Some common use cases for Apache Pulsar include stream data pipelines, messaging queues, data lakes, and simplifying microservices architecture. Its horizontal scalability allows it to support high throughput workloads. The durable storage means no data loss even if subscribers go down. It supports geo-replication across datacenters as well.
Overall, Apache Pulsar combines the elasticity and low latency of messaging systems with the durability and storage flexibility of databases to be a unified messaging and storage layer for cloud-native applications.
Apache Pulsar Features
Features
- Multi-tenancy
- Geo-replication
- Automatic data partitioning
- Tiered storage
- Low publish latency
- Guaranteed message delivery
- Multiple subscription modes
Pricing
- Open Source
Pros
High throughput
Low latency
Durable message storage
Flexible scalability
Multiple subscription modes
Cons
Complex configuration
Steep learning curve
No built-in security features
Limited monitoring and management tools
Official Links
The Best Apache Pulsar Alternatives
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