Distributed Locks
Distributed locks are a synchronization mechanism used in distributed systems to coordinate access to shared resources across multiple processes or nodes, preventing concurrent modifications that could lead to data corruption or race conditions. They ensure that only one process can hold the lock at a time, typically implemented using coordination services like ZooKeeper, Redis, or etcd, and are essential for maintaining consistency in distributed applications.
Developers should learn and use distributed locks when building scalable, fault-tolerant systems that require exclusive access to resources, such as in microservices architectures, distributed databases, or job scheduling systems. They are crucial for preventing race conditions in scenarios like leader election, cache updates, or ensuring idempotency in distributed transactions, where concurrent operations could compromise data integrity.