Default Owner (QDFTOWN) user profile

The Default Owner (QDFTOWN) user profile is an IBM-supplied user profile that is used when an object has no owner or when object ownership might pose a security exposure.

The following situations cause ownership of an object to be assigned to the QDFTOWN profile:
  • If an owning profile becomes damaged and is deleted, its objects no longer have an owner. Using the Reclaim Storage (RCLSTG) command assigns ownership of these objects to the default owner (QDFTOWN) user profile.
  • If an object is restored and the owner profile does not exist.
  • If a program that needs to be created again is restored, but the program creation is not successful. See the topic Validation of programs being restored for more information about which conditions cause ownership to be assigned to QDFTOWN.
  • If the maximum storage limit is exceeded for the user profile that owns an authority holder that has the same name as a file being moved, renamed, or whose library is being renamed.

The system supplies the QDFTOWN user profile because all objects must have an owner. When the system is shipped, only a user with *ALLOBJ special authority can display and access this user profile and transfer ownership of objects associated with the QDFTOWN user profile. You can grant other users authority to the QDFTOWN profile. QDFTOWN user profile is intended for system use only. You should not design your security such that QDFTOWN normally owns objects.