This document discusses the architecture of Monster, an event processing system built by Stripe using MongoDB. It describes how MongoDB's replica sets provide high availability and redundancy. It also explains how Monster takes advantage of MongoDB's atomic operations and automatic collection creation. The document store and background index creation in MongoDB support Monster's use case of processing large volumes of events.

1. Monster
Architecture of a MongoDB-powered Event
Processing System
Greg Brockman
Founding Engineer, Stripe
@thegdb // gdb@stripe.com

2. Monster

3. Live Demo!

8. MongoDB and Monster

9. Replica sets

10. Atomic operations

11. Automatic collection creation

12. Document store

13. Background index creation

14. Transactions?

15. Stripe, MongoDB, and Monster

17. Scaling

18. Questions?