The following identifies the phases of SET processing and the zones and data sets 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.

1. Initialization

   Global zone

   Read without enqueue.

   Target zone

   Read without enqueue.

   DLIB zone

   Read without enqueue.

   Note: The type of zone that is accessed depends on the zone specified in the SET command.
2. Global zone update

   Global zone

   Update with exclusive enqueue.

   SMPPTS

   Update with exclusive enqueue.

   Target zone

   Update with exclusive enqueue.

   DLIB zone

   Update with exclusive enqueue.

   Note:

   1. This phase is executed only if the zone type in the SET command was either a target zone or a distribution zone, and only if that target zone or distribution zone contained pending global zone updates from a previous APPLY, ACCEPT, or RESTORE command.
   2. Either the target zone or distribution zone is accessed, according to the zone type specified in the SET command.
3. Termination

   All resources are freed.