The Control GDO Editor, ctl, also called the PDE Control program, lets you display and modify PDE configuration settings. These settings affect how the PDE handles startup, responds to resets, and the functions during the normal operation of Teradata.
Globally distributed objects (GDOs) are binary files that store Teradata Database configuration settings. They are distributed to and used by every node in the system. The PDE layer of Teradata Database ensures that the GDO is consistent across all virtual processors.