Create a replication consistency group (RCG) and add it to the system. Replication occurs between volumes, and RCGs maintain consistency between volume pairs in an RCG.
Prerequisites
Volumes in an RCG pair must be exactly the same size.
Protection domains must be configured on both source and target systems.
About this task
The recovery point objective (RPO) configured in RCGs defines the maximum amount of time during which data is lost.
Dell Technologies recommends setting a low RPO to ensure that minimal data is lost during a possible compromise of data transfer from source to target. If for example, if one minute is set as the RPO, you will not lose more than 30 seconds of data. There is no replication unless the source volume is consistent with the data from the target volume.
Steps
On the menu bar, click
Protection > RCGs.
Click
Add RCG.
In the
Add RCG wizard, enter the information for the RCG:
On the
Properties page:
Enter the
RCG Name.
Enter the number of
RPO (recovery point objective) seconds or minutes. This is the amount of time of data loss is tolerated if replication between the systems is compromised.
NOTE:It is recommended to enter the minimum amount of time the feature allows, which is 15 seconds.
Select the
Source Protection Domain.
Select the
Target System.
Select the
Target Protection Domain.
Click
Next
.
On the
Provisioning Type page:
If you have not defined volumes to receive replicated data in the target system, select
Auto Provisioning.
If you have already defined volumes to receive replicated data in the target system, select
Manual Provisioning.
For auto provisioning only, on the
Replication Pairs page, perform the following:
Click the desired volume in the
Source column.
Select a type:
Thick or
Thin.
Select a storage pool from the target system.
Click
Add Pair. The volume pair is added.
Click
Next.
On the
Map Volumes page, select a volume on the target side.
Select a host to which to map the volume.
Click
Next, and go to step 3(e).
Click
Next.
For manual provisioning only, on the
Replication Pairs page, perform the following:
Select the desired volume in the
Source column, and then in the
Target column, select the target volume (only volumes of the same size are displayed).
Click
Add Pair. The volume pair is added.
Click
Next.
On the
Summary page, ensure that the correct source and volume pair are defined, and then click
Create and Activate or
Create.
The
Create and Activate option creates the RCG and starts replication. The
Create option creates the RCG but does not activate it. You can activate it later from
Protection > RCGs > More Actions > Activate.
Optionally, at the top right of the window, click the
Running Jobs icon, and check the progress of the initial copy state.
Verify that the operation has finished and was successful, and click
Dismiss.
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