Creating Mirrors With Multiple Targets

SIOS DataKeeper provides the ability to replicate data from a single source volume to one or more target volumes. In addition, DataKeeper also allows you to switch over control and make any of the target volumes become the source. Assuming you have already created a job with a mirror using the Create a Mirror procedure, use the following procedure to create a second mirror from the same source volume to a different target volume:

1. Right-click on an existing job.

2. Choose the Create a Mirror action.

3. Choose the source of the existing mirror (as this will also be the source of the new mirror).

4. Choose the target for the new mirror.

5. Select Done.

The next dialog displayed prompts you for additional information that DataKeeper requires to be able to properly switch over the source volume to one of the target volumes. You already specified the network endpoints between the source system and the first target system when you created the first mirror. You also specified the network endpoints between the source system and the second target system when you created the second mirror.

The final piece of information DataKeeper requires is the network endpoints of a (potential) mirror between the first target system and the second target system so that no matter which system becomes the source of the mirrors, mirrors can be properly established between all three systems.

6. On the Additional Information Needed dialog, choose the network endpoints that will be used to create a mirror between the first target system and the second target system.

This mirror will not be created now. DataKeeper is simply storing these mirror endpoints for future use.

7. Select OK.

Note: If you are replicating a single source volume to more than two target volumes, you will have to provide network endpoints for mirrors between all of the systems involved.

Examples:

3 Nodes (A,B,C) – Define Endpoints for Mirrors
Created Mirrors	Additional Mirror Relationships
A → B	B → C
A → C

 

4 Nodes (A,B,C,D) – Define Endpoints for Mirrors
Created Mirrors	Additional Mirror Relationships
A → B	B → C B → D C → D
A → C
A → D