Customizing the CA Ideal Environment › Operating System Requirements › Requirements for a Single z/OS System

Requirements for a Single z/OS System

All CA Ideal tasks must run on a single z/OS system because the IBM z/OS operating system does not provide cross-system protection from concurrent destructive updates, except through the RESERVE macro. VLS (Virtual Library System) uses an ENQ macro to protect against concurrent destructive updates on a single system, but does not issue a RESERVE to avoid causing indefinite waits in the teleprocessing monitor. Therefore, it is imperative that any site using CA Ideal ensure that all CA Ideal tasks are run on the same system by taking the following actions:

1. Ensure that multiple teleprocessing monitors supporting CA Ideal run on the same system.
2. Ensure that all PRINT commands where the destination is a system printer direct the resulting batch print job to the same system where the teleprocessing monitor is running. For JES2 only, if you specify MCPU=YES in the session control options block (see CA Ideal installation procedures for z/OS), CA Ideal automatically generates the following statement:

   /*JOBPARM S=*
   

3. Ensure that all other batch jobs, including CA Ideal batch (the IDBATCH proc), VLS utility runs (VLSUTIL proc), and CA Ideal Transport Utility runs (IDLXPRT proc) run on the same system as the teleprocessing monitor. Use one or more of the following methods to ensure that batch jobs are all on the correct system:
   1. Specify a job class known only on that system for CA Ideal runs.
   2. Enforce the use of a /*JOBPARM (JES2) or //*MAIN (JES3) statement.
   3. Catalog at least one CA Ideal file only on the master catalog for the system.