RedisDistributed Locks with Redis in Spring Boot
How to implement distributed locks using SET NX PX and Lua scripts, using Redisson with watchdog, writing tests with Testcontainers, and avoiding common pitfalls.
Bloom filter with Redis: preventing cache penetration in Spring Boot
Use Bloom filter on Redis (via Redisson) to block requests querying non-existent keys before they penetrate the cache and hit the database.
Hot keys and big keys in Redis: detection and handling
How to identify hot keys and big keys in Redis using redis-cli, MEMORY USAGE, OBJECT FREQ, and how to handle them by key sharding, UNLINK, local cache, and key replication.
Keeping Cache and Database Consistent with Redis
How to apply cache-aside pattern with Redis in Spring Boot, delete cache after commit, handle race conditions, and test with Testcontainers.
Redis persistence: RDB, AOF and when data loss occurs
Understand how Redis writes data to disk using RDB and AOF, configure each mode, and identify scenarios where data loss still occurs even with persistence enabled.
Redis Streams with Consumer Groups: Reliable Event Processing
Use Redis Streams and consumer groups in Spring Boot 3 to process at-least-once events with manual ACK, retry pending messages, and dead-letter streams.
Redis: Choosing Cache-Aside, Write-Through, or Write-Behind
Comparing three popular caching strategies with Redis and Spring Boot 3: implementation, pros and cons, common errors, and when to use each one.
Redlock: distributed lock across multiple Redis nodes and the controversy around it
Understand the Redlock algorithm, implement it yourself using Jedis, write tests with Testcontainers, and learn why Martin Kleppmann believes it is not safe.
Redis for Reservation Systems: Seat Locking with SET NX PX and Auto Expiry
Hold seats temporarily in a ticketing system using Redis SET NX PX: atomic locking, auto-expiry, safe release with Lua, with Spring Boot 3 examples and tests.
Redis Geo: Finding Nearest Locations with Spring Boot
Use Redis Geo (GEOADD, GEOSEARCH) and Spring Data Redis to store coordinates, find nearby stores, and calculate distances.
Redis sorted set: leaderboard, priority queue and sliding window
Use Redis sorted set with Spring Boot 3 to build leaderboards, priority/delay queues and sliding window rate limiters. Includes working code and tests.
Pub/Sub and Redis Streams: Differences and How to Use with Spring Boot
Compare Redis Pub/Sub and Redis Streams, with specific Java code examples to help you choose the right messaging model for your system.
Caching with Redis: TTL, Eviction, and Cache Stampede
Learn how to configure TTL, Redis eviction mechanisms, and how to prevent cache stampede when multiple requests miss the cache simultaneously.
Rate Limiting with Redis in Spring Boot
A guide to building a rate limiter with Redis and Lua scripts, applied to Spring Boot APIs, with testing examples using Testcontainers.
Redis Basics: Data Types and When to Use Them
A comprehensive guide to Redis's main data types (String, Hash, List, Set, Sorted Set) with Java examples and real-world use cases.