Using Schedule Manager › Definition of Terms

Definition of Terms

The description of the Schedule Manager in this document and the Schedule Manager panels use the following set of special terms:

Schedule

A complete, self-contained set of scheduling information, including:

• A list of time periods included in this schedule. See the description of period below.
• Information about system resources and their respective states during a specified time period.

Resource

A component of your system, such as a DASD controller, a printer, or an application program. The Schedule Manager schedules desired state changes only to resources defined in one of the relational tables included in the SSM_MANAGED_TBLS table of the System State Manager.

Period

The dates and times governing when System State Manager changes the desired state of one or more resources. A period has start and end times specified in hours and minutes and either a cyclic or a fixed start date and end date:

• A cyclic date consists of one or more days of the week (Sunday, Monday, and so on). If you use a cyclic date, then the period takes effect every week on the same day or days.
• A fixed date consists of specific days of specific months. If you specify one fixed date, then the period takes effect only on the specified day (for example, March 27). If you specify two fixed dates, then the period begins on the first date and ends on the second date. For example, if you specify 11/11-12/12, the period begins on November 11 and continues until December 12. You can optionally specify the year of the first date. If the year of the first date is specified, then the period is active only once beginning on the first date in the specified year. If the year of the first date is not specified, then the period is active every year beginning on the first date (unless it is February 29, which is active in leap years only). The year of the second date is assumed from the first date, whether a year has been specified on the first date. A fixed date period cannot span more than 365 days.

A single period can change the desired state of many resources, and more than one period can control the desired state of a single resource.

Period set

All periods that apply to a specific date and time.

Link

A link is the association between a resource and a period.

Link item

A link item is either the resource or the period that is part of a link.

Link item column

The column on Schedule Manager panels containing the link item. For example, if the link item is a resource, then the resource column is the link item column.

Link group

The group of system resources or periods that is associated with the link item. For example, if the link item is a resource, then the link group is all periods that change the desired state of that resource.

Link group column

The column on Schedule Manager panels that contains the link group. For instance, if the link item is a period, then the link group column is the resources column.

Conflict

A Schedule Manager conflict occurs when two periods specify opposite desired states for the same resource at some point in time.

Conflict group

The periods specifying conflicting desired states for a resource.

Overlap

The situation that occurs when a new period begins before the previous period ends. Overlapping periods may or may not produce a conflict.

Commands column

The column on Schedule Manager panels where you issue line commands. When the commands column resides in the period column (its default location), you can issue line commands against periods. To issue line commands against resources, you need to move the commands into the resource column. PF11 moves the commands column to the resource (right) side of the screen; PF10 moves the commands column to the period (left) side of the screen.