Tracking Versions in MongoDB

I'm honoured to have been asked by Asya to contribute a guest post to her series on Tracking Versions in MongoDB.

Here's Asya's full series on the topic, which I recommend reading in order:

1. How to Track Versions with MongoDB
2. How to Merge Shapes with Aggregation Framework
3. Best Versions with MongoDB
4. Further Thoughts on How to Track Versions with MongoDB  (my guest post)

Song for today: Someday I Will Treat You Good by Sparklehorse