Importing MODBLKS resource and descriptor definitions by using the automatic import function

With dynamic resource definition (DRD) enabled, you can enable the automatic import function so that MODBLKS resource and descriptor definitions are imported to IMS during IMS cold start processing.

For IMS to automatically import definitions from an IMSRSC repository, IMS must be enabled with DRD and the repository.

For IMS to automatically import definitions from a system RDDS, IMS must be enabled with DRD.

For IMS to automatically import definitions from a system RDDS, AUTOIMPORT=RDDS or AUTOIMPORT=AUTO must be specified in the DYNAMIC_RESOURCES section of the DFSDFxxx member and all of the conditions listed in the description of the parameter must be true.

For IMS to automatically import definitions from the repository, AUTOIMPORT=AUTO or AUTOIMPORT=REPO must be specified in the DYNAMIC_RESOURCES section of the DFSDFxxx member and all of the conditions listed in the description of the parameter must be true.

With DRD and the automatic import function enabled, resource definitions are imported from the IMS.MODBLKS data set, or resource and descriptor definitions are imported from a system RDDS or from the repository. When a resource or descriptor definition is imported, IMS creates the control blocks that are used to manage the resource. Information, such as the attributes of the resource or descriptor and the status of the resource, is saved in internal control blocks. The information kept in the control blocks is referred to as the runtime resource or descriptor definition. When IMS is up and running, you can use the IMPORT DEFN command to import resource and descriptor definitions from a system or non-system RDDS or from the repository.

To enable automatic import from the repository:
1. Make sure the conditions for automatic import from the repository are true.
  If all of the following conditions are true, automatic import from the IMSRSC repository is enabled:
  - MODBLKS=DYN is specified to enable DRD in IMS.
  - The REPOSITORY section of the DFSDFxxx member is defined with TYPE=IMSRSC.
  - IMS is enabled with RM services (RMENV=N is not specified in the DFSCGxxx member of the IMS PROCLIB data set or in the CSL section of the DFSDFxxx member of the IMS PROCLIB data set)
  - The CSLRIxxx member of the IMS PROCLIB data set is defined for the repository with TYPE=IMSRSC.
  - The repository contains stored resource definitions for the IMS system.
  - RM is started with the repository enabled.
  - The RS address space is started and available.
2. Specify AUTOIMPORT=AUTO or AUTOIMPORT=REPO in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB data set.
To enable automatic import from an RDDS:
1. Make sure the conditions for automatic import from an RDDS are true.
  If all of the following conditions are true, automatic import from an RDDS is enabled:
  - MODBLKS=DYN is specified to enable DRD in IMS.
  - The REPOSITORY section of the DFSDFxxx member of the IMS PROCLIB data set is not present.
  - Two or more system RDDSs are defined in the RDDSDSN() parameter of the DFSDFxxx member of the IMS PROCLIB data set.
  - All of the defined RDDSs can be allocated and read.
  - At least one of the RDDSs contains valid resource and descriptor definitions.
2. Specify AUTOIMPORT=RDDS or AUTOIMPORT=AUTO in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB data set.
To enable automatic import from the IMS.MODBLKS data set:
1. Make sure the conditions for automatic import from the MODBLKS data set are true.
  If all of the following conditions are true, automatic import from the MODBLKS data set is enabled:
  - MODBLKS=DYN is specified to enable DRD in IMS.
  - The REPOSITORY section of the DFSDFxxx member of the IMS PROCLIB data set is not present.
  - No RDDSs are defined in the DFSDFxxx member of the IMS PROCLIB data set, or all the defined RDDSs are empty.
  - The MODBLKS data set exists and is not empty.
2. Perform one of the following tasks:
  - Specify AUTOIMPORT=MODBLKS in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB data set.
  - If the repository and RDDS are empty, specify AUTOIMPORT=AUTO in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB data set.