Because of the way SMP/E controls access to the various CSI data sets, only one user can update a data set at a time. However, the global zone and SMPPTS data sets are affected whenever SYSMODs are installed; either the zone name must be placed in the global zone SYSMOD entries, or the SMPPTS must be deleted. To avoid tying up these resources with requests for update access, SMP/E takes these actions:

• It records information in the zone being updated to reflect pending updates to the global zone and SMPPTS. Then, during one of the last phases in APPLY, ACCEPT, or RESTORE processing, SMP/E tries to make those pending changes to the global zone or SMPPTS. If either the global zone or SMPPTS is not available during this phase, SMP/E leaves the pending updates in the target zone or distribution zone.
• Whenever SMP/E opens a zone, the first thing it does is check for pending updates. If there are any, it tries to make the changes in the global zone and SMPPTS. If the global zone and SMPPTS are still not available, command processing continues, and the updates are left for the next access to that zone.
• Once the updates are made, SMP/E deletes the pending information from the target zone or distribution zone.