In this recipe, we will simulate some operations on a standalone Mongo instance. We need to start a standalone server listening to any port for client connections; in this case, we will stick to the default 27017. If you are not aware of how to start a standalone server, refer to the Single node installation of MongoDB recipe in Chapter 1, Installing and Starting the MongoDB Server. We also need to start two shells connected to the server started. One shell will be used for background index creation, and the other will be used to monitor the current operation and then kill it.

Unlike in our test environment, we will not be able to simulate the actual long-running operation. We, however, will try to create an index and hope it takes a long time to create. Depending on your target...