Advanced Topics › Control and Checkpoint File Considerations › How You Migrate to a New Control File › Migrate to a Virtual Control File

Migrate to a Virtual Control File

You use the MIGRATE MASTER command to migrate from a DASD control file to a virtual control file in a CTCDASD environment or from one virtual control file to another in a CTCONLY, CTCDASD, or XCF environment. You can migrate to a new master system only if that system is eligible to be a master system.

To migrate from a DASD control file or a virtual control file to a virtual control file

1. Issue the following command to view the list of eligible master systems.:

   DISPLAY GLOBALVALUE
   

2. Issue the following command:

   MIGRATE MASTER=sysid
   

   sysid

   Specifies the system ID (sysid) of the new master system as specified on a DEFSYS statement.

   For example, to abandon the current DASD control file and designate a virtual control file on system SYS1, issue this MIGRATE command:

   MIGRATE MASTER=SYS1
   

When migrating from a virtual control file, the virtual control file is transferred to the CA MIM address space on the newly selected master system.

To migrate to the next preferred master system

Issue the following command:

MIGRATE MASTER