Search

Lessons (8)

• Storage Engines & Database Operations

  Understand B-trees, LSM trees, write-ahead logs, connection pools, backups and the signals behind database reliability. What …

• Database Internals, Replication and Scaling

  Connect storage-engine choices, durability, replicas, query plans, pooling and data layout to real production behaviour. ![Database path …

• Debug Latency Like an Investigator

  … More app servers can mean more borrowers for the same exhausted connection pool. Prove where the wait lives.

• Resilience Patterns

  … give each dependency its own limited pool of connections, threads or concurrent calls. A slow recommendations service can …

• Creational Patterns: How to Make Objects

  … const pool = new pg.Pool({ connectionString: process.env.DATABASE URL, max: 10 }); js // anywhere.js import { pool } from …

• What Are Design Patterns?

  … Builder, Prototype, Singleton 🧱 Structural How do I connect objects into bigger structures? Adapter, Bridge, Composite, Decorator, Facade …

• Hexagonal Architecture (Ports & Adapters)

  … its own language ForPlacingOrders , OrderRepository Adapter Code that connects a real technology to a port Express controller, Postgres …

• Scaling, Load Balancing & Rate Limiting

  … Bigger servers get more Mixed server sizes Least connections Server with the fewest active requests Requests vary in …