MongoDB Best Practices

What this best practices guide is

A practical guide to MongoDB best practices for application developers. It covers supported versions, schema design around access patterns, schema validation including the new constraint level in 9.0, compound indexes with the ESR guideline, queries and aggregation within memory limits, write concern and transactions, driver connection handling, and the security checklist for a production deployment.

It has 8 chapters and 30 practices, each with why it matters, what to do and what to avoid. For backend developers who use MongoDB.

Chapter by chapter

1. Versions and deployment (3 practices)

Which MongoDB versions are supported, why every deployment should be a replica set, and how to approach a major upgrade.

2. Schema design (5 practices)

Designing documents around how the application reads and writes data, and avoiding the anti-patterns the MongoDB docs call out.

3. Schema validation (3 practices)

Letting the database reject malformed documents, and rolling validation out safely on collections that already have data.

4. Indexing (4 practices)

Building compound indexes in the right field order, checking them with explain, and keeping the index set lean.

5. Queries and aggregation (4 practices)

Reading only what you need, paginating efficiently and keeping aggregation pipelines within MongoDB 9.0 memory limits.

6. Writes, consistency and transactions (4 practices)

Choosing write and read concern, designing for single-document atomicity, and using multi-document transactions within their limits.

7. Drivers and connections (3 practices)

Creating and reusing clients, setting timeouts and handling serverless platforms without exhausting connections.

8. Security and operations (4 practices)

The MongoDB security checklist applied to a typical application, plus backups and monitoring.

How it works on Sefism

The guide reads like a short course: a syllabus, then one chapter per page in a focused reader, with a quiz at the end of each chapter for members. The opening chapters are open to everyone. Adding it to your account uses credits, opens every chapter and keeps your progress.

Every claim is checked against the sources listed on the page (8 cited).