Legit D-RP-OE-A-24 Exam Download

When a Consistency Group failover is performed to a remote copy in a Dell RecoverPoint system, the point-in-time images stored in the copy Journal are deleted after the copy becomes the new production.This is because the copy Journal’s role is to maintain a record of changes for recovery purposes, and once the copy is promoted to production, its Journal is reset to start recording new changes from that point forward1.

The process involves the following steps:

Failover Initiated: The administrator initiates a failover to the remote copy.

Copy Becomes Production: The remote copy is promoted to the production role.

Journal Reset: The point-in-time images in the copy Journal are deleted as part of the promotion process.

New Production Journal: A new production Journal is started to record changes from the new production copy moving forward.

This ensures that the RecoverPoint system can continue to protect the data with a fresh start for the new production environment1.

In a Distributed Consistency Group (DCG) configuration, the primary RPA and secondary RPAs work together to manage a larger data throughput than a single RPA can handle. This is achieved by dividing the workload among multiple RPAs. As a result, there is an increase in traffic observed on the WAN network between the RPAs.This is because the data that is being replicated needs to be transferred over the WAN to ensure that all RPAs have the necessary information to maintain consistency and data protection1.

The process involves:

The primary RPA receives write I/Os from the production environment.

The primary RPA then distributes the data to the secondary RPAs over the WAN.

The secondary RPAs process the data and replicate it to their respective Journal volumes.

This distribution of workload allows the DCG to handle higher throughput and IOPS rates than a single RPA could manage1.

It’s important to note that while there is additional traffic on the WAN, this does not necessarily mean that the FC (Fibre Channel) links or management network are unaffected.However, the most significant increase in traffic is observed on the WAN network, which is the communication link between the RPAs in a DCG configuration1.

In Dell RecoverPoint, the Journal volumes play a crucial role in asynchronous replication. They store a history of write operations that have occurred on the production volumes, allowing for point-in-time recovery and data rollback. The write operations to the Journal volumes are typically large sequential writes.This is because the Journal is designed to efficiently record and consolidate changes made to the production data, which often involves large blocks of data being written in sequence1.

The Journal’s sequential write pattern is optimized for the replication process, ensuring that data is recorded with minimal impact on the production environment.This design choice reflects the need for the Journal to quickly and reliably capture data changes, which can then be replicated to the remote site asynchronously, without requiring immediate acknowledgment from the remote site1.

For detailed information on the configuration and operation of the Journal in a RecoverPoint system, it is recommended to refer to the official Dell RecoverPoint documentation or contact Dell EMC support for guidance specific to your system’s configuration and version1.

In a Dell RecoverPoint system with XtremIO arrays at both production and disaster recovery sites, setting the replication mode for a Consistency Group as “Continuous” implies that the replication occurs continuously without predefined intervals. This mode aims to minimize the Recovery Point Objective (RPO), which is the maximum targeted period in which data might be lost due to a major incident. While an RPO of 0 seconds is ideal, it is often not practical due to network latency and system processing times.Therefore, an effective RPO of less than 60 seconds is a realistic target for a “Continuous” replication mode, ensuring that data loss is minimized to the lowest possible timeframe in the event of a disaster1.