Determining when to perform a cold start

Perform a cold start when an IMS was down during the last global online change and its restart type conflicts with the last online change type or when an IMS was down for two or more global online changes.

Perform a warm start when an IMS was down during the last global online change and the restart does not conflict with the last global online change.

For more information about the types of restart commands permitted for specific online change types, see Performing a cold start.

Table 1. Restart commands permitted for specific online change types
Online change type Restart commands permitted
ACBLIB
  • /NRE CHECKPOINT 0
  • /ERE COLDBASE
ALL
  • /NRE CHECKPOINT 0
FORMAT
  • /NRE CHECKPOINT
  • /NRE
  • /ERE
  • /ERE COLDCOMM
  • /ERE COLDBASE
MODBLKS
  • /NRE CHECKPOINT 0