In a cold start, initialization of CICS occurs with limited reference to any system activity recorded in the CICS catalogs. With the exception of resynchronization information for remote systems noted below, no system log or warm keypoint information is used from any previous run of CICS. Dump table entries from a previous run are also deleted in a cold start.
CICS actions on a warm start:
A warm start restores certain elements of the CICS components that can be warm started to the status that was recorded in the warm keypoint of the previous normal shutdown.
In a warm start:
v Resource definition information is obtained as follows:
– Tables specified by system initialization parameters, such as MCT=xx, areobtained from the program library. Information contained in the warm keypoint of the previous run is used to update the information from the program library.
– Information in the groups in the list named by the GRPLIST system initialization parameter for this initialization is ignored.
– Information in the groups in the list named by the GRPLIST system initialization parameter for the previous initialization is obtained from the warm keypoint and the global catalog.
– Information in groups that have been installed since the last cold start is obtained from the warm keypoint and the global catalog.
v Selected fields from the CSA are restored from the warm keypoint,