Stateless Services Session Migration: A Staged Walkthrough
Move monolith sessions to stateless services in reversible stages: audit session data, externalize to Redis with dual reads, then drop sticky sessions safely.
15 min read
Category
Monoliths & Modular Monoliths
When one deployable is the right answer, how to structure it, and how to migrate in either direction.
Refactor a Monolith with Feature Toggles, Not Long-Lived Branches
Why long-lived branches fail large monolith refactors, and how branch by abstraction plus short-lived feature toggles enable safe incremental refactoring.
17 min read
The Majestic Monolith: A Guide to Convention Over Distribution
Learn what a majestic monolith is, how to enforce module boundaries in one deployable, scale it, and recognize the signals that justify extracting a service.
12 min read
What a Microservices-Ready Monolith Actually Means in Code
Learn how to test whether a monolith is microservices-ready: data ownership, explicit contracts, enforced boundaries, cross-module transactions and a scoring checklist.
13 min read
Modular Monolith Testing: Make the Module Your Main Test Unit
Shape a modular monolith test suite around module tests with real infrastructure, faked neighbours, contract tests, boundary rules and thin end-to-end checks.
13 min read
Monolith Performance: Find and Fix the Real Bottleneck First
Learn to baseline, trace and profile a slow monolith, fix N+1 queries and database hot paths, and choose a caching strategy before considering a rewrite.
18 min read
Modular Monolith Folder Structure: Layout, Naming, Boundaries
Learn a modular monolith folder structure: package by feature, one public API per module, data ownership, naming rules, and CI checks that enforce boundaries.
13 min read
How to Split a Shared Database Safely in a Monolith Migration
Split a shared database by separating ownership first: map coupling, isolate schemas, pick CDC, outbox or dual writes, then cut over with rollback at each step.
14 min read
Modular Monolith Communication: Module APIs, Events and Outboxes
Learn when modules in a modular monolith should call each other through narrow APIs, when to use in-process events, and how to enforce boundaries.
14 min read
Modular Monolith Database Design: Schemas, Ownership and Foreign Keys
Design a modular monolith database in PostgreSQL: schema per module, enforced data ownership, cross-module foreign keys, safe cross-module queries and migrations.
14 min read
Module Boundaries in a Monolith: Enforce Them with Code
Learn how to enforce module boundaries in a monolith using dependency rules, package visibility, build units, and architecture tests that run in CI.
13 min read
When to Split a Monolith: Signals, Prerequisites, and Trade-offs
Learn when to split a monolith: how to confirm scaling bottlenecks, team contention, and deploy coupling, what to try first, and how to extract safely.
14 min read