Question

I am contemplating the design of an event logging system based on CouchDB.

What would be a good way of storing each event?

1. one document with events as ‘attachments’
2. one document per event
3. one document per event-type, events as attachments

Other?

Answer 1

I would set one document for event. If it is event logging system, event is main entity, right? So IMHO it should be document, not just some attachment. This solution gives you flexibility when searching/filtering events.