PowerFlex 3.5 leverages journal-based replication to achieve very low Recovery Point Objective (RPO) and ensure minimal data loss. PowerFlex 3.5 supports a replication frequency of 30 seconds (minimum) up to 1 hour (maximum).
To ensure RPO compliance, PowerFlex replicates at least twice for every RPO period. For example, setting RPO to one minute means that PowerFlex can immediately return to operation at the target system with only one minute’s worth of data loss. In order to achieve an RPO of one minute, replication takes place at least every 30 seconds. RPO compliance is calculated according to when the application data arrives at the target journal. Achieving RPO is the most important consideration in replication management. The user-defined RPO is the goal of replication. Even so, RPO compliance is not guaranteed. The system reports RPO compliance for each Replication Consistency Group (RCG).
Dell EMC, PowerFlex [SDS]/3.5, Enterprise
Remote Replication Frequency, Disaster Recovery, Data Availability