MongoDB vs. Redis vs. Cassandra for a fast-write, temporary row storage solution

Question

I\'m building a system that tracks and verifies ad impressions and clicks. This means that there are a lot of insert commands (about 90/second average, peaking at 250) and some

Answer 1

I can get around 30k inserts/sec with MongoDB on a simple $350 Dell. If you only need around 2k inserts/sec, I would stick with MongoDB and shard it for scalability. Maybe also look into doing something with Node.js or something similar to make things more asynchronous.