Advanced Topics › Product Activation Considerations › How You Dynamically Change CA MIM Communication Methods › Add a System when COMMUNICATION=XCF

Add a System when COMMUNICATION=XCF

You want a system dynamically added to the established MIMplex using COMMUNICATION=XCF. The CA MIM name and alias are honored as coded on the DEFSYS statement.

Follow these steps:

1. Issue the DISPLAY INIT command to ensure that the MIMPLEX is running with COMMUNICATION=XCF and COMPATLEVEL= 11.9 or greater.
2. Issue the DISPLAY SYSTEMS command to verify that you have an active MIMPLEX. The new system cannot be the first active system in the MIMPLEX.

   MIM0108I SYSTEMS DISPLAY
     INDEX ALIAS SYSTEM   RELATION STATUS      OPSYS     LAST ACCESS
      01    03   MIMMC003   LOCAL  MASTER       zOS  2012.026 10:52:21.82
      02    13   MIMMC013   EXTERNAL FREED
   

3. Issue the DEFSYS command with your preferred parameters.

   DEFSYS (MIMMC062,62,XE62)
   

   Verify that the following message appears:

   MIM0408I - System Add Successful - MIMMC062
   

4. Issue the DISPLAY SYSTEMS command to ensure that the new system was added correctly.

   INDEX ALIAS SYSTEM   RELATION STATUS      OPSYS     LAST ACCESS
     01    03   MIMMC003 LOCAL    MASTER      zOS  2012.026 10:57:06.16
     02    13   MIMMC013 EXTERNAL FREED
     03    62   MIMMC062 EXTERNAL FREED
   

   For a new system to become a VCFMASTER system, update the GLOBALVALUE parameter.

5. Issue a DISPLAY GLOBALVALUE command. Note the list of eligible master systems.

   MIM0373I MIM GLOBALVALUE display:
   ANYELIGIBLE=YES       MOSTPREFERRED=YES     NOMASTER=WAIT 
   VCFMASTER=( MIMMC003, MIMMC013 )
   ELIGIBLE MASTER LIST: MIMMC003, MIMMC013
   

6. Issue the following command on one system only:

   GLOBALVALUE VCFMASTER={LIST} 
   

   Note: Copy the VCFMASTER list from the prior command and add the desired system.

   GLOBALVALUE VCFMASTER=( MIMMC003, MIMMC013 , MIMMC062)
   

7. Verify Output:

   MIM0363I GLOBALVALUE command changes pending on external systems
   GLOBALVALUE command processing complete 
   

8. Issue a DISPLAY GLOBALVALUE command again to verify that the desired system was added to the VCFMASTER list.

   MIM0373I MIM GLOBALVALUE display:
   ANYELIGIBLE=YES       MOSTPREFERRED=YES     NOMASTER=WAIT
   VCFMASTER=( MIMMC003, MIMMC013, MIMMC062)
   ELIGIBLE MASTER LIST: MIMMC003, MIMMC013, MIMMC062
   

9. Update the GLOBALVALUE statement in the MIMINIT member to match the exact text of the operator command.

   GLOBALVALUE VCFMASTER=(MIMMC003,MIMMC013, MIMMC062),
               ANYELIGIBLE=YES,
               NOMASTER=WAIT,
               MOSTPREFERRED=YES
   

10. Update the DEFSYS statement in the MIMINIT member. Be sure to code the new system last on the system list.

    DEFSYS (MIMMC003,03,XE03,INITIAL=FREED),
           (MIMMC013,13,XE13,INITIAL=FREED),
           (MIMMC062,62,XE62)
    

11. Allocate checkpoint files for the new system. Defined them using the CHKPTDSN statement in the MIMINIT member.

    MIMINIT CHKPTDSN=CHIMA14.MIMMC0&SYSCLONE..MIMCKP
    

12. Start the new system with FORMAT=CHKPT.
13. Confirm that the new system has been added by entering a DISPLAY SYSTEMS command.

    MIM0108I SYSTEMS DISPLAY
      INDEX ALIAS SYSTEM   RELATION STATUS      OPSYS     LAST ACCESS
       01    03   MIMMC003 EXTERNAL MASTER      zOS  2012.026 11:05:55.14 
       02    13   MIMMC013 EXTERNAL FREED
       03    62   MIMMC062 LOCAL    ACTIVE      zOS  2012.026 11:05:55.2
    

The new system has been added.