Pessimistic Locking
Assumes conflicts will occur and locks data at the start of a transaction to prevent concurrent modifications. Ensures data integrity at the cost of throughput.
Pessimistic Locking: Lock Before You Touch
Why some writes are too expensive to retry and must be serialized up front.
Pessimistic Locking in Production: Distributed Locks
Locks across services and processes: Redis locks, database advisory locks, and their failure modes.
Advanced Pessimistic Locking: Deadlock Avoidance and Escalation
Deadlock detection, lock hierarchies, and knowing when to escalate beyond row locks.
Pessimistic Locking: Review & Mastery Quiz
Scenario questions on locks, leases, and deadlocks.
Free Books & Guides
Official Documentation
Video Courses
Pessimistic Locking — Explained (YouTube)
A video explanation of the Pessimistic Locking principle with practical examples.
freeCodeCamp — Software Architecture Course
A comprehensive course covering software architecture principles, patterns, and best practices.
ByteByteGo — Distributed Systems
High-quality animated explanations of system design principles, distributed systems, and architecture patterns.