Backend Distributed Locking

Purpose

Coordinate access to shared resources across multiple service instances using distributed locks with guaranteed safety properties.

Agent Protocol

Trigger

Exact user phrases: "distributed lock", "Redis lock", "Redlock", "ZooKeeper lock", "advisory lock", "PostgreSQL lock", "pg_advisory_lock", "lease", "distributed mutex", "fencing token", "lock timeout".

Input Context

• Resource being protected.
• Available infrastructure (Redis, PostgreSQL, ZooKeeper, etcd).
• Number of competing instances.
• Duration of the critical section.

Output Artifact

Lock configuration or implementation code. No file unless requested.