Kristina Chodorow1 shared a good list of tests to put a MongoDB cluster through:
Here are some exercises to battle-test your MongoDB instance before going
into production. You’ll need a Database Master (aka DM) to make bad things
happen to your MongoDB install and one or more players to try to fix it.
Netflix is using a series of tools that perform similar tests against their Cassandra clusters. With a small twist: they are run against the production clusters.
Original title and link: Battle-Test Your MongoDB Cluster ( ©myNoSQL)