D-RP-OE-A-24 Dell RecoverPoint Operate Achievement Questions and Answers

In Unisphere for RecoverPoint, the “Manage Recovery” wizard is the tool that allows administrators to manage and monitor all currently accessed copies that are undergoing testing, failover, and production recovery. This wizard provides a centralized interface for overseeing the recovery operations and ensuring that they are proceeding as expected. It includes features to:

View the status of recovery operations.

Manage failover and failback processes.

Monitor the progress of data synchronization and access during testing 1 .

This wizard is an essential part of the RecoverPoint management suite, providing administrators with the capabilities needed to ensure the continuity and integrity of their data protection processes 1 .

Questions no: What will be the replication state between the new production and former production when the administrator selects “Set Copy as Production”?

Verified Answer: When “Set Copy as Production” is selected, the failover replica copy is confirmed as the new Production and initiates replication to additional replicas other than the original Production copy which is already receiving writes after the failover 1 . This means that the replication state between the new production and former production would involve initiating replication to the additional replicas.

Step by Step Comprehensive Detailed Explanation with References:

Failover Occurs : The administrator initiates a failover, which involves switching the roles of the production and non-production copies.

Set Copy as Production : The administrator selects the “Set Copy as Production” option, which confirms the failover replica copy as the new Production.

Replication Initiated : Replication is initiated to additional replicas, excluding the original Production copy, which continues to receive writes after the failover.

State of Former Production : The former production copy, now a replica, will be in a state where it is receiving the replicated data from the new production copy.

This process ensures that the data protection and replication continue seamlessly after the failover, with the new production copy taking over the role of the source for replication 1 .

In a Dell RecoverPoint system, there is a limit to the number of volumes that can be managed within a cluster. If an administrator attempts to add local copies to existing Consistency Groups and the system already contains a significant number of Consistency Groups and replication sets, it is possible that adding more local volumes would exceed the system’s volume limit, which is 16,000 volumes per cluster 1 .

Here’s how the volume count could exceed the limit:

Each of the 100 Consistency Groups has 80 replication sets.

Assuming each replication set consists of at least one volume, this would already account for 8,000 volumes (100 CGs x 80 volumes each).

Adding a local copy for each Consistency Group would double the number of volumes, potentially exceeding the 16K volume limit per cluster.

This limitation is in place to ensure system stability and performance. If the limit is exceeded, the administrator will not be able to add additional local copies until the volume count is reduced or the system is reconfigured to stay within the limit 1 .

For Distributed Consistency Groups in a Dell RecoverPoint environment, the minimum size required for each journal volume is 40 GB. This is the minimum per copy, which can be a single LUN or multiple LUNs that add up to at least 40 GB 1 .

The size of the journal is determined by the write change rate of what is being replicated and the protection window required per Consistency Group. A general rule of thumb is about 15-20% of the total amount of data being replicated. For example, if a Distributed Consistency Group (DCG) has production server LUNs totaling 500 GB, then the journal per copy would be about 100 GB following this rule 1 .

It’s important to note that while 40 GB is the minimum, the actual size may need to be larger depending on the specific requirements and write change rate of the environment. The journal size should be sufficient to handle the data changes and provide the necessary protection window 1 .

In Dell RecoverPoint, a Consistency Group is built from one or more replication sets. Each replication set consists of a production volume plus any local or remote copy volumes to which it is replicating 1 . Since the mission-critical application is stored on three volumes, and each volume will be part of a replication set, the Consistency Group for the application will contain three replication sets. This ensures that all three volumes are protected and replicated as part of the RecoverPoint protection strategy 1 .

It’s important to note that the number of replication sets in a Consistency Group is equal to the number of production volumes being replicated. Therefore, if an application spans multiple volumes, each volume will be part of its own replication set within the Consistency Group 1 .

When setting up replication for a Consistency Group between clusters using XtremIO storage arrays at each site connected through Fibre Channel, the maximum throughput that can be expected per RecoverPoint Appliance (RPA) is 300 MB/s. This throughput is a measure of how much data can be transferred from one site to another per second by each RPA involved in the replication process.

The throughput capacity is important for planning and ensuring that the RecoverPoint system can handle the expected data load during replication activities. It affects the Recovery Point Objective (RPO) and the overall efficiency of the disaster recovery setup. The 300 MB/s figure provides a benchmark for administrators to gauge the performance capabilities of their RecoverPoint system when used in conjunction with XtremIO storage arrays 1 .

It’s important to note that actual throughput can vary based on several factors, including network conditions, the amount of data being replicated, and the specific configuration of the RecoverPoint and XtremIO systems 1 .

In Dell RecoverPoint, a Bookmark is a user-created point-in-time image that can be tied to specific application events. This feature allows users to mark a particular point in time within the continuous data protection timeline of RecoverPoint, which can be used for recovery purposes. Here’s how it works:

User Command : A user issues a command to create a Bookmark, typically through the RecoverPoint management interface or via scripting.

Tied to Application Events : The Bookmark can be associated with specific application events, such as before and after a significant update or batch process.

Point-in-Time Image : The Bookmark represents a point-in-time image of the data at the moment the Bookmark was created.

Recovery : In the event of data corruption or loss, the Bookmark can be used to recover data to the exact state it was in at the time of the Bookmark.

Bookmarks are an integral part of RecoverPoint’s data protection capabilities, providing flexibility and precision for data recovery operations 1 .

To identify whether physical or virtual RPAs are in use on a specific cluster using Unisphere for RecoverPoint, follow these steps:

Navigate to RPA Clusters : In Unisphere, locate and click on the ‘RPA clusters’ section.

Select Cluster Name : Find and select the specific cluster you want to investigate.

View RPA Details : Click on the ‘RPAs’ option to view detailed information about the RPAs associated with the selected cluster.

This process will provide you with the necessary information to determine the type of RPAs (physical or virtual) that are being used within the specified cluster 1 .

When using the CLI to create a new Consistency Group in RecoverPoint, after initiating the process with the create_group command, the next step involves adding volumes to the group. The add_replication_volume command is used to add a volume to a Consistency Group as a replication volume. This command specifies the volume to be replicated and associates it with the newly created group 1 .

The sequence of commands would typically follow this pattern:

Run create_group to initiate the creation of a new Consistency Group.

Run add_replication_volume to add each production volume that needs to be replicated within the Consistency Group.

Additional commands would follow to configure the properties of the Consistency Group and its replication sets 1 .

It’s important to note that the add_group_set command is used for different purposes, such as grouping multiple Consistency Groups together, and the create_replication_volume and create_production_copy commands are not standard commands in the RecoverPoint CLI for this context 1 .

In Dell EMC RecoverPoint, virtual RPAs (vRPAs) use iSCSI protocol for connections. This is because vRPAs are designed to operate in virtual environments where iSCSI is commonly used for storage networking due to its ability to work over standard IP networks. Physical RPAs, such as Gen-5 and Gen-6, typically use Fibre Channel (FC) for direct storage connectivity 1 .

Here’s a breakdown of the connectivity:

vRPA : Utilizes iSCSI for connections to protected storage. This is suitable for virtualized environments where the RecoverPoint for Virtual Machines (RP4VMs) operates.

Gen-5 and Gen-6 RPAs : These are physical appliances that generally use Fibre Channel for connectivity, which is more common in physical data center environments where dedicated storage networks are present 1 .

It’s important to choose the correct RPA type based on the storage infrastructure and connectivity requirements of the environment 1 .

A MetroPoint Consistency Group is a special type of Consistency Group in Dell RecoverPoint that is designed for environments where high availability and disaster recovery are critical. It includes:

Active Production Copies : These are the primary copies that are actively used in the production environment.

Standby Production Copies : These copies are on standby and can be activated in case the active production copies fail or need to be taken offline for maintenance.

The MetroPoint Consistency Group allows for continuous data protection and availability across multiple sites, combining the benefits of VPLEX Metro with the third-site replication provided by RecoverPoint 1 .

When using the automatic journal provisioning feature in RecoverPoint, the system requires dedicated resource pools to be set up. These resource pools are predefined storage resources that RecoverPoint can utilize to automatically create and allocate Journal volumes as needed when adding a Consistency Group 1 .

The process for setting up automatic journal provisioning typically involves:

Creating Resource Pools : The administrator defines resource pools within the storage array, dedicating specific storage resources for RecoverPoint’s use.

Configuring RecoverPoint : Within the RecoverPoint configuration, the administrator specifies that these resource pools are to be used for automatic journal provisioning.

Adding a Consistency Group : When a new Consistency Group is added, RecoverPoint automatically provisions Journal volumes from the dedicated resource pools without manual intervention by the administrator.

Monitoring and Managing Journals : The administrator can monitor the automatically provisioned Journals and manage them as necessary through the RecoverPoint management interface.

This feature streamlines the process of setting up and managing Journal volumes, making it more efficient and less prone to human error 1 .

The save_settings command in Dell RecoverPoint is used to commit cluster configuration changes to the repository volume. When changes are made to the RecoverPoint cluster configuration, they need to be saved to ensure that they persist across system reboots and are recognized by all nodes in the cluster. The repository volume serves as a centralized storage location for these configurations 1 .

The process of using the save_settings command is as follows:

After making configuration changes to the RecoverPoint cluster, the administrator issues the save_settings command.

The command commits the changes to the repository volume, which is a dedicated space on the storage array for storing system settings.

This ensures that the configuration changes are preserved and can be accessed by the RecoverPoint Appliances (RPAs) when needed 1 .

It’s important to note that the save_settings command does not create a script file for later use, nor does it modify the configuration backup interval. Its primary function is to ensure that any changes made to the cluster configuration are saved and applied correctly 1 .

Snapshot Technology : XtremIO arrays use snapshot technology that allows for quick access to data at a specific point in time.

Logged Access Mode : When using RecoverPoint with XtremIO arrays, Logged Access mode is used because it leverages the snapshot capabilities of XtremIO.

Instant Promotion : The snapshots created by XtremIO are instantly promoted as the SCSI personality of the copy, making them immediately accessible to the host.

Efficiency : This process is efficient because it does not require the Journal to roll forward or backward, which would be necessary for other access modes like Virtual Access.

This capability is part of what makes XtremIO an effective storage solution for environments requiring rapid access to multiple data points for testing, development, or recovery purposes 1 2 .