https://www.ibm.com/docs/en/ims/15.1.0?topic=ogocf-making-online-changes-dedbs
IMS 15 - System administration - Making online changes for DEDBs
In the IMS DB/DC and DBCTL environments, you can make both database-level and area-level changes to Fast Path data entry databases (DEDBs). A database-level...
system administrationimsmakingonlinechanges