ZooKeeper for Engineers: The 5 Core Use Cases

Understand what ZooKeeper actually does in distributed systems and confidently apply each of its five coordination patterns — configuration management, leader election, distributed locking, service registry, and distributed barriers — in your own architecture

3 sections · 9 lessons

Course outline

ZooKeeper Fundamentals

  1. What ZooKeeper Is (and Isn't)
  2. The Primitives: Ephemeral Nodes, Sequential Nodes, and Watchers

The 5 Core Use Cases

  1. Use Case 1: Distributed Configuration Management
  2. Use Case 2: Leader Election
  3. Use Case 3: Distributed Locking
  4. Use Case 4: Service Registry and Cluster Membership
  5. Use Case 5: Distributed Barriers

Gotchas and the Road Ahead

  1. Common Pitfalls: Size Limits, Write Throughput, and Quorum
  2. Kafka's Move Away from ZooKeeper (KRaft Mode)

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