What is the term for how often the most recent media sets are overwritten?

The term that describes how often the most recent media sets are overwritten is referred to as "Short-Term Retention." In the context of data management and backup strategies, short-term retention pertains to the preservation of recently generated data, often for immediate access and recovery. This retention strategy allows for quick restoration of data from the most current backup set, which is crucial in environments where data changes frequently and rapid recovery is necessary.

Short-term retention typically involves overwriting older backup sets with newer ones, ensuring that the most recent data is readily available. This approach contrasts with long-term retention strategies, which focus on keeping data for extended periods, such as compliance or archival purposes. Data preservation is a broader term that can encompass various strategies, including both short-term and long-term retention. Meanwhile, "Data in Use" refers to data actively being accessed or modified, rather than data management practices regarding retention.