Advanced Topics › Product Activation Considerations › Running Components in Separate Address Spaces

Running Components in Separate Address Spaces

Many customers activate all CA MIM components in a single address space. That is a single CA MIM startup procedure references parmlib members that activate all CA MIM components. Other customers find it advantageous to activate CA MIA and CA MIC in one address space, and CA MII in a second address space. Other customers prefer running three address spaces, each having one CA MIM component activated.

Note: We recommend running CA MII in a separate address space from CA MIA and CA MIC.

Consider the following issues when running multiple address spaces:

• Each address space must be activated using a uniquely named startup procedure. Each procedure must reference unique MIMINIT, MIMCMNDS, and MIMSYNCH parmlib members, and unique control files.
• Each address space needs a unique command character as defined by the CMDPREFIX option of the SETOPTION MIM or MIMINIT commands.
• Severe problems affecting one CA MIM address space do not affect the other CA MIM address spaces running on the same system.
• If you run CA MIM with CA MIM for z/VM, we strongly recommend running CA MII separately from CA MIA and CA MIC.
• You can stop each address space individually using the assigned command prefix character. For example, you can stop CA MIA without affecting CA MII.
• Consider setting MIMINIT MSGPREFIX=CMDPREFIX when running CA MIM components in separate address spaces. This parameter lets each CA MIM address space prefix its messages with its unique command prefix character. These unique prefix characters help system operators and programmers easily identify the CA MIM address space from which a particular message originated.

Important! When running multiple address spaces, you can use the z/OS MODIFY (F) command, F MIM, to direct commands to all CA MIM address spaces. For display commands like F MIM, D FACILITIES, or F MIM, D SYSTEMS, all CA MIM address spaces respond.

However, exercise caution when using F MIM to issue commands. For example, the command F MIM,SHUTDOWN causes all CA MIM address spaces to terminate. Instead of using F MIM, use the command prefix character to direct commands to the CA MIM address space you want to control. (If you named your CA MII started task MIMDASD, specify F MIMDASD.)

The following are component-specific sample startup procedures in the CAI.CBTDPROC data set that reference component-specific sample parmlib members in the CAI.CBTDPARM data set:

• Procedure PROCMIA references parmlib members MIAINIT, MIACMNDS, MIASYNCH
• Procedure PROCMIC references parmlib members MICINIT, MICCMNDS, MICSYNCH
• Procedure PROCMII references parmlib members MIIINIT, MIICMNDS, MIISYNCH