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The ORDER parameter of the Control‑O monitor specifies the name of a member containing the list of rules to be loaded by Control‑O upon startup. The easiest organization method is using one list member containing all Control‑O tables (for example, the supplied member RULELIST). This is the preferred method when Control‑O does not control IPL. However, if Control‑O controls IPL, it must be organized somewhat differently.
As your site’s use of Control‑O expands, it is possible that hundreds of operations rules are defined. Loading all of these operation rules can take time. Control‑O does not start to analyze messages until it has finished loading all rules in the initialization rule list. Consequently, if the list is quite large, Control‑O may not detect some of the messages and commands issued during the beginning of the IPL process.
To ensure analysis of all messages, it is recommended to place all rules that control the IPL process in a separate list. This list is loaded when Control‑O is started by overriding the default list member name using parameter ORDER to designate member IPLRULES. Member IPLRULES must contain only the rule tables to be used during IPL. One of the rules in this member must load the remaining Control‑O rule tables.
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