With dynamic resource definition (DRD) enabled, you can enable the automatic import
function so that MSC resource definitions are imported to IMS
during IMS cold start processing.
With DRD and the automatic import function enabled, resource definitions are imported from the
IMSRSC repository or the DFSCLL3x member
of the IMS.SDFSRESL data set. When a resource definition is
imported, IMS creates the control blocks that are used to
manage the resource. Information, such as the attributes 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 definition.
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To automatically import MSC resource definitions from the IMSRSC repository, specify AUTOIMPORT=AUTO or AUTOIMPORT=REPO in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB data set.
If you are using channel-to-channel (CTC) links, consider removing the DD definitions for the
CTC links from the IMS JCL before you import
the MSC resources from the IMSRSC repository. This allows the CTC addresses
that are defined to be used for the CTC links that are imported from the IMSRSC repository.
If MSC resource definitions exist in the IMSRSC repository, the definitions are imported
from the repository at the next IMS cold start.
If an IMS system is cold started on a different z/OS® system than the z/OS
system where a channel-to-channel link was created and exported, and that channel-to-channel address
is not defined on the new z/OS system, the CTC link open
fails and omits issuing the DFS2168I
CONNECTION ESTABLISHED ON LINK x message. However, the automatic
import continues. You can use the UPDATE MSPLINK SET(ADDR(addr))
command to change the address of the MSC physical to an address that is valid for that z/OS system.
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To automatically import MSC resource definitions from the DFSCLL3x member of the IMS.SDFSRESL data set, specify AUTOIMPORT=AUTO in the DYNAMIC_RESOURCES section of the DFSDFxxx member of the IMS PROCLIB data set.
If the DFSCLL3x member exists and is not empty and either or both of the following
conditions are true, the MSC resource definitions are automatically imported from the DFSCLL3x
member at the next IMS cold start:
- The REPOSITORY section of the DFSDFxxx member of the IMS
PROCLIB data set is not present.
- The IMSRSC repository does not
contain MSC resource definitions.