In continuous data protection, what does the amount of journal space determine?

In Continuous Data Protection (CDP), the amount of journal space determines how far back in time the data can be recovered. The journal space stores all the changes made to the data over time, allowing recovery to any specific point within that timeframe. The larger the journal space, the more historical data it can hold, thus enabling recovery from further back in time.

References:

Dell Information Storage and Management V5 course materials, section on Continuous Data Protection (CDP)

Dell EMC documentation on CDP and journal management