# 00 - Scalable LMS Architecture: Multi-Tenant Patterns

Designing scalable multi-tenant LMS: schema isolation, tenant routing, caching and database optimization for millions of users.

## What you'll learn

- Choose the multi-tenant pattern based on your customer profile, not technology trends. Shared schema + RLS is sufficient for most SaaS LMS platforms.
- Tenant resolution is the foundation of security. Implement it as robust middleware with caching and rigorous validation.
- PostgreSQL's Row-Level Security is your best ally for guaranteeing database-level isolation without excessive application complexity.
- Event-driven architecture is essential for notifications, analytics, and all real-time features of a modern LMS.
- Citus for PostgreSQL enables horizontal scaling with minimal application changes when a single node is no longer sufficient.

*This article is part of the **EdTech** series on federicocalo.dev.*

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## Read the full article

The complete article (27 min read) with code examples, diagrams, and practical exercises is available here:

**➡️ [00 - Scalable LMS Architecture: Multi-Tenant Patterns](https://federicocalo.dev/en/blog/scalable-lms-architecture-multi-tenant-patterns)**

`https://federicocalo.dev/en/blog/scalable-lms-architecture-multi-tenant-patterns`

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*By [Federico Calò](https://federicocalo.dev) — Software Developer & Technical Writer*