Lesson 17 of 18

MongoDB Best Practices

Schema Design Tips

Good schema design is the foundation of a performant MongoDB application.

  • Design for your queries — model data based on access patterns
  • Embed data that's read together
  • Reference data that's updated independently or grows unboundedly
  • Avoid deeply nested documents (max 2-3 levels)
  • Keep documents under 16MB (ideally much smaller)
  • Use meaningful field names but keep them reasonably short

Performance Tips

Optimize your MongoDB application for speed and efficiency.

  • Index fields used in queries, sorts, and joins
  • Use projection to return only needed fields
  • Use aggregation pipeline for complex data processing
  • Monitor slow queries with the profiler
  • Use connection pooling in production
  • Set appropriate write concerns for your use case

Security Best Practices

Protect your MongoDB deployment with these security measures.

  • Always enable authentication
  • Use environment variables for connection strings
  • Enable IP whitelisting on Atlas
  • Use TLS/SSL for connections
  • Apply the principle of least privilege for database users
  • Regularly backup your data and test restores