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

Add a System when COMMUNICATION=DASDONLY

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

Follow these steps:

1. Ensure that no systems have been REMOVED from the MIMPLEX by reviewing the DISPLAY SYSTEMS command output:

   MIM0108I SYSTEMS DISPLAY
      INDEX ALIAS SYSTEM   RELATION STATUS      OPSYS     LAST ACCESS
       01    03   GK03     EXTERNAL ACTIVE      zOS  2012.013 12:25:45.38
       02    13   GK13     LOCAL    ACTIVE      zOS  2012.013 12:25:45.91
       03    23   GK23     EXTERNAL FREED
   

   Verify that there are no gaps between the index numbers. If there are no gaps, then it is safe to proceed with the next step. Otherwise, update the DEFSYS statement, shut down globally, then restart globally with a control file format.

2. Update the DEFSYS statement in the CA MIMINIT member:

   DEFSYS (GK03,03,XE03,INIT=FREED),
          (GK13,13,XE13,INIT=FREED),
          (GK23,23,XE23,INIT=FREED),
          (GK62,62,XE62,INIT=FREED)      /* new system
   

3. Start MIM on the new LPAR (GK62 in this example) with FORMAT=CHKPT or FORMAT=NONE if no checkpoints exist.

   The new system joins the established MIMplex and honors the CA MIM name and alias as coded on the DEFSYS statement.

4. Confirm the new system joined with the DISPLAY SYSTEMS command:

   MIM0108I SYSTEMS DISPLAY
      INDEX ALIAS SYSTEM   RELATION STATUS      OPSYS     LAST ACCESS
       01    03   GK03     EXTERNAL ACTIVE      zOS  2012.013 12:26:26.39
       02    13   GK13     EXTERNAL ACTIVE      zOS  2012.013 12:26:26.88
       03    23   GK23     EXTERNAL FREED
       04    62   GK62     LOCAL    ACTIVE      zOS  2012.013 12:26:27.36
   

The new system has been added to the MIMplex.