Distributed Locking Patterns
Implements exclusive resource access and prevents race conditions across distributed service instances using Redis and PostgreSQL.
This skill provides standardized patterns for coordinating exclusive access to shared resources across multiple service instances. It equips Claude with production-ready implementations for Redis-based locks (including Redlock for high availability) and PostgreSQL advisory locks. By utilizing these patterns, developers can reliably prevent duplicate job processing, implement leader election for singleton processes, and protect critical sections in distributed architectures while avoiding common pitfalls like deadlocks or owner-mismatched releases.
Key Features
01High-availability locking strategies using the Redlock algorithm
02PostgreSQL advisory locks for session and transaction-level coordination
03Redis-based locking with Lua scripts for atomic acquire/release operations
04Pre-configured retry strategies with exponential backoff and jitter
05Safety mechanisms including mandatory TTL management and owner-fencing
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Use Cases
01Preventing duplicate processing of background jobs or events across multiple workers
02Implementing leader election for singleton processes like scheduled cron tasks
03Protecting critical sections and shared resources in high-concurrency distributed environments