Zookeeper

Prerequisite: Before reading this chapter, please ensure you have read the previous article in this series: Chapter 7: Fortifying Payment Systems with Idempotent APIs. In a standalone Go application, preventing two Goroutines from overwriting the same data (Race Condition) is achieved via sync.Mutex. However, when your system scales out to 10 servers behind a Load Balancer, sync.Mutex is useless because it only locks local RAM. You need a Distributed Lock. ...