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Methods to synchronize the Secondary

You can synchronize the Secondary using the network, using block-level tape backup or by physically moving disks to the Secondary. Use one of the following methods to synchronize the Secondary depending on your environment:

The following tables explain when and how to use the different synchronization methods:

Using the network

You can synchronize the Secondary over the network either when the application is active or inactive.

To Synchronize the Secondary:


Using This Command:


automatic synchronization and start replication 

vradmin -a startrep 


full synchronization with checkpoint 

vradmin -full -c checkpoint syncrvg 

when there is little difference between the data on the Primary and Secondary data volumes of the RDS 

difference-based synchronization with checkpoint. For more information, see Using difference-based synchronization

vradmin -c checkpoint syncrvg 

Using block-level tape backup

To Synchronize the Secondary:

Do the following:

Using This Command:

completely and when a large amount of data must be moved from the Primary to the Secondary 

1. Start a Primary checkpoint. 

vxrvg -c checkpoint checkstart 


2. Perform a block-level backup of the Primary. 



3. End the Primary checkpoint. 

vxrvg checkend 


4. Restore the tapes on the Secondary and start replication to the Secondary using the checkpoint. 

vradmin -c checkpoint startrep 


Moving disks physically

To Synchronize the Secondary:

Use This Feature

Using This Command:

completely by physically moving disks from the location of the Primary host to the location of Secondary host 

Disk Group Split and Join 

For instructions, see Using the Disk Group Split and Join feature