Dell PowerFlex 4.6.x Technical Overview

Recovery point objective

The recovery point objective is the maximum data loss, which is measured in units of time that would be lost in a disaster or outage.

PowerFlex uses journal-based replication to achieve very low recovery point objective and ensure minimal data loss. To ensure recovery point objective compliance, PowerFlex replicates at least twice for every recovery point objective period. For example, setting the recovery point objective to one minute means that PowerFlex can immediately return to operation at the target system with loss of only one minute of data. In order to achieve a recovery point objective of one minute, replication takes place at least every 30 seconds. Recovery point objective compliance is calculated according to when the application data arrives at the target journal. Achieving the recovery point objective is the most important consideration in replication management. The user-defined recovery point objective is the goal of replication. Even so, recovery point objective compliance is not guaranteed. The system reports recovery point objective compliance for each replication consistency group.

Data protection enables replication to multiple systems from one source system to up to four target systems.