Columns of the Prerequisite Database

The Prerequisite database must contain the following columns:

Table 16 Prerequisite Database Columns

Column	Description
FMOBJ	From Object. The object that can only be brought up if the object specified in TOOBJ is already up.
TOOBJ	To Object. The object that must be up before the object specified in FMOBJ can be brought up.
FMDB	From database. The Working Object database containing the FMOBJ object. A value is specified for this column only if the FMOBJ and TOOBJ objects are in different Working Object databases.
TODB	To database. The Working Object database containing the TOOBJ object. A value is specified for this column only if the FMOBJ and TOOBJ objects are in different Working Object databases.The following reserved prerequisite database field is optional:
WAY	Dependency relationships between objects at startup and shutdown. When a dependency relationship between two objects exists at startup, the inverse dependency normally exists at shutdown. Valid values: blank—Both the normal and inverse prerequisite conditions exist. Default. This also applies if the column in omitted. UP—Only the normal (startup) prerequisite exists. DOWN—Only the shutdown (inverse) prerequisite exists.

The following screen segment contains sample content of a Prerequisite database (as displayed in the Variable Database Definition screen):

Figure 12 Prerequisite Database Example

ROW FMOBJ TOOBJ FMDB TODB WAY

00007000 TCP VTAM UP

00008000 CICT APLCICT UP

00010000 IMS JES2 UP

00011000 VTAM JES2

00012000 TCP APLTCP COSSTCOB COSVTMOB

00013000 CICP VTAM DOWN

00014000 CTD JES2 DOWN

Control-O/COSMOS checks prerequisite dependency relationships between objects, for UP/DOWN, DOWN/UP or equivalent statuses (for example, ONLINE/OFFLINE, described in Generic Statuses). Other statuses are not checked for prerequisites.

Parent Topic

Creating and Maintaining the Prerequisite Database