The Journal lag in a Dell RecoverPoint system refers to the amount of data that has been written to

the production volumes but has not yet been replicated to the remote site or copy volumes. The

maximum Journal lag setting affects the RPO because it determines the maximum allowable time or

data volume that can pass before the data must be replicated to the remote site to meet the

recovery objectives.

Here’s how the Journal lag impacts the RPO:

Journal Lag Definition: Journal lag is the measure of the difference between the most recent write to

the production volume and what has been replicated to the copy volume.

RPO Impact: The RPO is the maximum targeted period in which data might be lost from an IT service

due to a major incident. If the Journal lag exceeds the maximum setting, it means that the RPO could

be breached, as there would be more data at risk of being lost than what is acceptable per the RPO

policy.

Management Actions: Administrators can monitor and manage the Journal lag to ensure that the

RPO is maintained. If the lag approaches the maximum setting, actions may be taken to increase

replication throughput or address any issues causing replication delays.

In summary, the maximum Journal lag setting is crucial for ensuring that the RPO is met, as it directly

influences the amount of data that could be lost in the event of a failure or disaster1.