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
Category
Monoliths & Modular Monoliths
When one deployable is the right answer, how to structure it, and how to migrate in either direction.
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
Microservices to Monolith: When and How to Consolidate Services
Learn when moving from microservices to a monolith makes sense, how to merge services into a modular monolith incrementally, and what it costs.
14 min read
How to Scale a Monolith Before You Split It into Microservices
Learn to scale a monolith by profiling bottlenecks, then applying vertical scaling, stateless horizontal scaling, caching, read replicas and async jobs.
17 min read
Monolith Architecture: Why It Still Wins for Most Teams
Learn what microservices really cost, how to build and scale a modular monolith, and the concrete signals that justify extracting a service.
12 min read
Modular Monolith vs Microservices: Decision Criteria That Hold Up
Learn when a modular monolith beats microservices, how to enforce module boundaries, and which team size, deployment, and scaling needs justify a split.
18 min read
Monolith to Microservices Migration with the Strangler Fig Pattern
Run a monolith to microservices migration as small, reversible extractions behind a routing layer, with data ownership, parity checks and clear exit points.
14 min read
Monolith vs Microservices Cost: Where the Money Actually Goes
Learn how monolith vs microservices cost breaks down across infrastructure, operational overhead and team time, and how to find your break-even point.
13 min read
Database Connection Pool Sizing for Monoliths Under Heavy Load
Size database connection pools from real database capacity and a global connection budget, tune HikariCP, use PgBouncer, and diagnose connection exhaustion.
14 min read