Open-sourcing Pulsar, Pub-sub Messaging at ScalePub-sub messaging is a very common design pattern that is increasingly found in distributed systems powering Internet applications. These applications provide real-time services, and need publish-latencies of 5ms on average and no more than 15ms at the 99th percentile. At Internet scale, these applications require a messaging system with ordering, strong durability, and delivery guarantees. In ord
