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• Fail-over is an automated operation that occurs when a Subagent or Director Agent instance is aborted forcibly terminated or killedcrashed. Fail-over is applied in case of abnormal termination.
• Switch-over is a manual operation performed by users disabling/enabling Subagents or switching the active role of Director Agent instances.

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• Subagents execute jobs on behalf of the Director Agent.
• They report back log output and the execution results of jobs to the Director Agent.
• If a Subagent fails then the Director Agent can hand-over the job execution request to the next Subagent.
• A Subagent kills running terminates running jobs if the connection from the Director Agent is lost or if it is instructed by the Director Agent to suspend/killforce or to cancel/killforce an order.
  • For details see JS7 - FAQ - How does JobScheduler terminate Jobs
  • This behavior is intended to prevent double job execution by more than one Subagent.
  • If the connection from the Director Agent can be re-established within a given timeout then the Subagent will continue to execute jobs.

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