JS7 JobScheduler

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changes.mady.by.user Andreas Püschel

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  • Vertical Scalability
    • There are no built-in limits as to the overall number of jobs and number of parallel job executions per Controller and Agent.
    • A single Controller is tested for some 50 000 parallel tasks, a single Agent is tested for approx. 15 000 parallel tasks.
    • Adding more power to a single machine (CPU, Memory, SSD Disks) will improve performance as the components products will make use of all available cores.
  • Horizontal Scalability
    • Splitting the job load across a number of Agents will push the number of parallel tasks.

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The recommendation indicates dedicated resources available to JS7 componentsproducts. Resource usage by additional components running software running on a machine come on top.

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  • Journal files
    • Journal files are used by Controller instances and Agent instances to store information about state transitions and log output. Typically such information is immediately forwarded from an Agent to the Controller and from the Controller to JOC Cockpit. However, in case of high load or outage of a component product such as a Controller, then the Agent will continue to execute jobs and store such information in its journal. Journal files therefore can grow, technically to the max. size imposed by the OS. Journal files will shrink after JS7 components products are recoupled. For most situations with <100 000 job executions per day and an outage period < 24h it is sufficient to assume 5 GB diskspace for journal files. 
  • Log files
    • Log files are by default configured for log rotation to limit diskspace consumption and to restrict the number of files in use, see the JS7 - Log Rotation article for more information.
      • All log files are controlled by Log4j2 and allow individual configuration.
      • By default diskspace consumption is limited to 5 GB and log files are retained for 30 days. This applies to each JOC Cockpit, Controller and Agent.
    • Recommendations
      • It is suggested that not less than 1 GB disk space is assigned for logs. Use of more than 5 GB disk space should be required only if the retention period for log files is prolonged.
      • When JS7 components products cannot write to a log file then they will be blocked from further operation. To prevent such a situation add a disk space monitoring task to your system monitor.

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