InfoScale™ 9.0 Replication Administrator's Guide - AIX

Converting an original Primary to a Secondary

VVR provides the vradmin makesec command to convert the original Primary to a Secondary. This command is only needed if fast failback was not enabled when the original takeover was performed. If fast failback was enabled, the original Primary will automatically be converted to a Secondary when DCM playback begins. Note that this command can be run only from the original Primary host where one of its original Secondaries has taken over the Primary role.

You can issue the vradmin makesec command in the failback procedure only if fast failback has not been enabled when taking over from the original Primary. Run this command when the original Primary restarts. Stop the application if it restarts automatically when the Primary restarts. The vradmin makesec command converts the original Primary to a Secondary RVG.

Tip: Before using the vradmin makesec command make sure you close all the applications running on the original Primary's data volumes. Also ensure that none of the data volumes are open.

The vradmin makesec command fails if the Secondary data volumes are not up-to-date or if there are some applications still running on the failed Primary's data volumes. Use the -f option to convert a failed Primary to a Secondary even when the Secondary data volumes are not up-to-date. If any of the failed Primary data volumes are open or have applications running on them, then using the vradmin makesec command with the -f option will fail. To proceed with the vradmin makesec command, first close the volumes or stop the applications as required.

To convert an original Primary to a Secondary:

# vradmin -g diskgroup makesec local_rvgname newprimary_name

The argument diskgroup is the disk group on the local host.

The argument local_rvgname is the name of the RVG on the local host, that is, the original Primary and represents its RDS.

The argument newprimary_name is the name of the new Primary host, that is, the previous Secondary host. Note that the newprimary_name argument must be the same as the host name displayed with the Primary-Primary configuration error in the output of the vradmin -l printrvg command.