How to use Agents with Fixed Priority Scheduling and Round-Robin Scheduling

Scope

• Jobs and Job Chains can be executed by Agents. 
• Agents can be operated in an Agent Cluster:
  
  • Fixed Priority Scheduling
    • JobScheduler Master selects the first available Agent from a cluster for job execution.
    • Should an Agent not be available then the next available Agent is used.
    • JS-1554 - Getting issue details... STATUS
  • Round-Robin Scheduling
    • JobScheduler Master switches the Agent used for each job execution.
    • Should an Agent not be available then the next available Agent is used.
    • JS-1188 - Getting issue details... STATUS
• Example configuration files are provided for downloading.

Agent Cluster Configuration

Agent configuration for Fixed Priority Scheduling

Description

• The process class is assigned a Primary Agent and a Fallback Agent
  • Process Class configuration for Fixed Priority Scheduling Expand source

    <process_class>
        <remote_schedulers select="first">
            <remote_scheduler  remote_scheduler="http://agent1:4445"/>
            <remote_scheduler  remote_scheduler="http://agent2:4445"/>
        </remote_schedulers>
    </process_class>

• All jobs are executed by the Primary Agent.
• Only If the Primary Agent becomes unavailable then the Fallback Agent will become active.
• If later on the Primary Agent becomes available then subsequent jobs will be executed on that Agent.

Note that:

• Fixed Priority Scheduling requires that the select parameter is set to first as shown in the code block above.
• If the select parameter is not set then fixed priority scheduling will be carried out by default.

Example

• Download fixed_priority_scheduling_agent.zip
  • Extract the archive to your live folder, a directory fixed_priority_scheduling_agent will be created.
• The process class - 01_ProcessClass_Fixed_Priority_Scheduling_Agent - has been configured for two Agents: adjust these values to point to your Agent installations.

Agent configuration for Round-Robin Scheduling

Description

• The process class is assigned a two Agents that are use interchangeably.
  • Process Class configuration for Round-Robin Scheduling Expand source

    <process_class>
        <remote_schedulers select="next">
            <remote_scheduler  remote_scheduler="http://agent1:4445"/>
            <remote_scheduler  remote_scheduler="http://agent2:4445"/>
        </remote_schedulers>
    </process_class>

• Jobs are executed interchangeably on each Agent.
• If one Agent becomes unavailable then the jobs will be executed on the remaining Agent.

Note that:

• Round-Robin Scheduling requires that the select parameter is set to next as shown in the code block above.
• If the select parameter is not set then fixed priority scheduling will be carried out by default.

Example

• Download round_robin_scheduling_agent.zip
  • Extract the archive to your live folder, a directory fixed_priority_scheduling_agent will be created.
• The process class - 01_ProcessClass_Round_Robin_Scheduling_Agent - has been configured for two Agents: adjust these values to point to your Agent installations.

References

Change Management References

Documentation

• JobScheduler Reference Documentation:
  • the <process_class> element
  • the <remote_scheduler> element
  • the <job_chain process_class="..."/> attribute

See also

• How to execute Jobs and Job Chains with Agents