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.
Indexes in PostgreSQL: B-tree, GIN, and When to Use Them
Understand B-tree and GIN indexes in PostgreSQL, how to create them, read EXPLAIN, and choose the right index type for each scenario.
Kafka Basics: Topics, Partitions, and Offsets
Explaining three fundamental Kafka concepts — topic, partition, offset — with producer/consumer examples using Spring Boot.
Load Balancer: Algorithms and When to Use Them
A comprehensive guide to common load balancing algorithms (Round Robin, Least Connections, Consistent Hashing...) with Java examples and selection criteria for different scenarios.
Monolith or Microservices: How to Choose Right
Analyze practical criteria to choose between monolith and microservices, with code examples demonstrating operational costs for each architecture.
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.
Strategy Pattern: Replace if-else with an Interface
Guide to applying Strategy Pattern in Java/Spring Boot to eliminate long if-else chains and make code easier to extend and test.