This document describes how to resize the Pulsar cluster based on the demand of your workload. When demand is high, you can add nodes to scale up the cluster. When demand is low, you can scale the Pulsar cluster back down.You can resize a Pulsar cluster by increasing or decreasing the number of Pulsar components, including the Pulsar brokers, BookKeeper, ZooKeeper, and Pulsar Proxy. In most cases, you only need to add or remove the Pulsar broker and BookKeeper nodes.