Redis Architecture Design Guide — Standalone to Cluster
Practical comparison of Redis Standalone, Sentinel, and Cluster architectures. Differences explained and selection criteria by service scale from an engineering perspective.
TestForge Team
Learning Game
Backend Architecture Challenge
Read backend keywords about databases, cache, and messaging, then pick the best role.
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Concept Explorer
Use keys 1-4 for quick answers.
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Cache and Data Layer
2 articles
Setting Up Redis Cluster — From 6-Node Configuration to Operations
Step-by-step guide to building a Redis Cluster from scratch. 6-node setup, slot distribution, client connections, and failover handling — all production-focused.
TestForge Team
Database Engineering
2 articles
PostgreSQL Index Tuning Guide — How to Reduce Slow Queries with EXPLAIN ANALYZE
PostgreSQL performance problems are not solved by creating more indexes blindly. This post explains how to read EXPLAIN ANALYZE, when Seq Scan is acceptable, how composite index ordering works, when partial indexes help, and how to tune sorting and pagination queries in practice.
TestForge Team
MongoDB vs PostgreSQL — Which Database Should You Choose?
A practical comparison of MongoDB and PostgreSQL. Data models, performance, transactions, and operational costs — selection criteria from a real-world engineering perspective.
TestForge Team
Messaging and Resilience
1 articles
Kafka Dead Letter Queue Design Guide — Retries, Isolation, and Safe Reprocessing
A practical guide to handling failed Kafka messages with Dead Letter Queues. Covers when to retry, when to send to DLQ, what metadata to keep, and how to design safe replay workflows.
TestForge Team
Spring and JVM
5 articles
JVM Options Tuning for Production — Complete Guide from GC to Memory
Step-by-step JVM tuning for Spring Boot production servers. GC algorithm selection, heap sizing, GC logging, OOM response, and container environment pitfalls — all from real-world practice.
TestForge Team
Spring WebFlux Complete Guide — Reactive Programming in Practice
From WebFlux fundamentals to real-world implementation. Mono/Flux, Router Function, R2DBC, error handling, testing, and a performance comparison with MVC — all production-focused.
TestForge Team
Spring Boot Memory Leak — Root Causes and Diagnosis
Five common memory leak patterns in Spring Boot applications and how to quickly diagnose them with Heap Dump analysis.
TestForge Team
Spring Boot Performance Tuning — Cut Response Time by 50%
Practical tuning methods to reduce Spring Boot application response time. Step-by-step guide covering DB connection pools, JPA optimization, caching, and JVM settings.
TestForge Team
Spring Boot NullPointerException — Root Causes and Prevention Patterns
Seven common causes of NPE in Spring Boot development, and how to prevent them fundamentally using Optional, defensive coding, and tests.
TestForge Team