Exchange of information
Initially, the critical start time for jobs in the critical network is calculated by the planner and then recalculated, as required, by the plan monitor. Both of these components run on the master domain manager.
The critical start time is used by agents to determine when to promote a job. It is initially sent to the agent when the new Symphony file for the plan is distributed. Subsequent changes to critical start times are sent by the plan manager to agents using a IBM Workload Scheduler message. The agents update the local copy of the Symphony file.
The most common situations in which the plan monitor updates critical
start times are:
- The Workload Designer functions on the Dynamic Workload Console or the conman command are used to modify jobs in the critical network. For example, predecessor jobs are added or cancelled.
- When JnextPlan is run to create the plan extension that includes the critical job, jobs in the original plan might be predecessors of the critical job and so be part of the critical network. In this case, critical start times are calculated by the plan monitor and sent in messages to the agents. This information is updated in both the local Symphony files and in the database where the plan data is replicated.