The Identifier Assignment Job Plugin runs bulk Identifier Assignment for a CO.
This is a core plugin, and so is enabled by default.
This Job can be scheduled using the UI via CO > Configuration > Identifier Assignments > Autogenerate Identifiers For All.
Queued jobs will be processed by Registry Job Shell when run with the
$ ./Console/cake job id_assigner -s --coid co [--object-type type [–-object_id id]]
This functionality is provided by the Core Job Plugin.