z/OS DFSMStvs Planning and Operating Guide
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Peer recovery initiation

z/OS DFSMStvs Planning and Operating Guide
SC23-6877-00

You can use the ARM to initiate automatic peer recovery processing or the VARY SMS command to initiate peer recovery manually.

Recommendation: Use ARM as the method of initiating peer recovery processing.

To use ARM, you must create an ARM policy that groups instances of DFSMStvs with other resource managers that might have a shared instance in a unit of recovery. ARM supports this method with the administrative policy RESTART_GROUP utility control statement, which identifies related elements that are to be restarted as a group if the system on which they are running fails.

DFSMStvs registers with ARM as an abstract resource (one that is not associated with a job or started task) when it initializes. DFSMStvs requests that it be restarted only when the system on which it is running fails unexpectedly by specifying an element ending type of SYSTERM and an element bind of CURSYS. DFSMStvs provides its restart method by supplying the text of the required VARY SMS command as its start text when it registers with ARM. If DFSMStvs ends, it deregisters with ARM.

If the installation is not using ARM or if ARM is unavailable, you can initiate peer recovery manually by using the VARY SMS command. For example, issue this command:
VARY SMS,TRANVSAM(001),PEERRECOVERY,ACTIVE

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