Installation tasks
Before executing the IMS systems that use data sharing, you must complete several installation-related tasks.
The following table lists the tasks, indicates whether a task affects data sharing, and identifies other tasks that must be completed.
| Step | Installation task | Affects systems without data sharing | Affects systems with data sharing | Additional task |
|---|---|---|---|---|
| 1 | Build system libraries—IRLM | No | Yes | Add IRLM to system library. |
| 2 | Allocate and catalog IMS data sets | Yes | Yes | Prepare RECON data set.
Initialize DBRC controls. |
| 3 | Prepare system definition and JCL | Yes | Yes | Macros and JCL changes.
Perform system definition. |
| 4 | Tailor the z/OS® operating system | No | Yes | Add IRLM subsystem. |
| 5 | Tailor IMS performance options | Yes | Yes | Define buffers. |
| 6 | Build DBDLIB | No | No | None. |
| 7 | Build PSBLIB | Yes | Yes | Review PROCOPT values. |
| 8 | Build ACBLIB. | Yes | Yes | Perform ACBGEN |
| 9 | Selections for dynamic allocation | Yes | Yes | Review options. |
| 10 | Prepare MFS libraries | No | No | None. |
| 11 | Prepare program libraries | Yes | Yes | Review call sequences. |
| 12 | Perform initial database loading | No | No | None. |
| 13 | Establish security | No | No | None. |
| 14 | Initialize IMS.MODSTAT | Yes | Yes | Coordinate ACBLIB |
| 15 | Copy staging libraries to active libraries | Yes | Yes | Coordinate ACBLIB use. |