I'm working on a system which is similar but higher volume.<p>Have you done any benchmarks to test thousands of updates per second?<p>Same, but on the front-end. What is the impact of generating 10 reports per second for 2 hours? Do the writers get behind?<p>You won't have scaling issues in until the front-end hits some threshold of x queries per y updates, with x servers.<p>Good presentation on another application of mongo.