Zone and data set sharing considerations
The following identifies the phases of ZONEMERGE processing and the zones and data sets that SMP/E may require for exclusive or shared use during each phase. For more information about command phases and data set sharing in SMP/E, see Sharing SMP/E data sets.
- Initialization
- Global zone
- Read without enqueue.
- Target zone
- Read without enqueue.
- DLIB zone
- Read without enqueue.
Note:- Either the target zone or the distribution zone is accessed, according to the zone type specified in the previous SET command.
- Both the “from” and “to” zones are accessed at this time.
- ZONEMERGE processing
- Target zone
- Read with shared enqueue.
- Target zone
- Update with exclusive enqueue.
- DLIB zone
- Read with shared enqueue.
- DLIB zone
- Update with exclusive enqueue.
Note:- Either the target zone or the distribution zone is accessed, according to the zone type specified in the previous SET command.
- The “from” zone is accessed for read with shared enqueue; the “to” zone is accessed for update with exclusive enqueue.
- Termination
All resources are freed.