A data processing system and computer program product for managing resources of clusters is disclosed. A computer retrieves data about an event and other data about past events. The computer selects a set of past events that are similar to the event, based on the data about the event and the other data about the past events. The computer then analyzes the data about the event and the other data about the past events associated with the set of past events to identify a portion of the resources of one or more of the clusters required for use by the event.