z/OS JES2 Initialization and Tuning Guide
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Moving a checkpoint data set

z/OS JES2 Initialization and Tuning Guide
SA32-0991-00

If the checkpoint needs to be moved to another location, it can be done in two ways:
  • System managed rebuild (SETXCF command) if the structure attributes are the same and it is moved to a different coupling facility. Process should be as follows:
    SETXCF START,REBUILD,STRNAME=xxxxx
    or
    SETXCF START,REBUILD,CFNAME=xxxxx
    This process can be very useful when maintenance needs to be done on the coupling facility, or it needs to be powered down.
  • Use the JES2 dynamic reconfiguration dialog and move the structure to DASD or a different structure.
If the checkpoint size needs to be increased, it can only be done using the dynamic reconfiguration dialog. Again, two possibilities:
  • Move the checkpoint using the dialog to another larger structure or data set.
  • If the checkpoint needs to return to the original structure: invoke the dialog to move the checkpoint to another structure or DASD.
When complete, a D XCF of the original structure will show it to be allocated with no connection.
Activate the new policy which will be in a policy change pending status.
SETXCF START,POLICY,TYPE=CFRM,POLNAME=newpol
Issue the rebuild to enlarge the original structure:
SETXCF START,REBUILD,STRNAME=xxxxx
When complete, the reconfiguration dialog must be invoked to move the checkpoint back into the original structure.

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