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Table of Contents

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  1. Preface
  2. Understanding Pipeline Partitioning
  3. Partition Points
  4. Partition Types
  5. Pushdown Optimization
  6. Pushdown Optimization and Transformations
  7. Real-time Processing
  8. Commit Points
  9. Row Error Logging
  10. Workflow Recovery
  11. Stopping and Aborting
  12. Concurrent Workflows
  13. Grid Processing
  14. Load Balancer
  15. Workflow Variables
  16. Parameters and Variables in Sessions
  17. Parameter Files
  18. FastExport
  19. External Loading
  20. FTP
  21. Session Caches
  22. Incremental Aggregation
  23. Session Log Interface
  24. Understanding Buffer Memory
  25. High Precision Data

Advanced Workflow Guide

Advanced Workflow Guide

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Session Task Strategies

Session Task Strategies

When you configure a session for recovery, you can recover the session when you recover a workflow, or you can recover the session without running the rest of the workflow.
When you configure a session, you can choose a recovery strategy of fail, restart, or resume:
  • Resume from the last checkpoint.
     The Integration Service saves the session state of operation and maintains target recovery tables. If the session aborts, stops, or terminates, the Integration Service uses the saved recovery information to resume the session from the point of interruption.
    You cannot configure a session with a resume strategy if it uses mapping variables.
  • Restart task
    . The Integration Service runs the session again when it recovers the workflow. When you recover with restart task, you might need to remove the partially loaded data in the target or design a mapping to skip the duplicate rows.
  • Fail task and continue workflow.
     When the Integration Service recovers a workflow, it does not recover the session. The session status becomes failed, and the Integration Service continues running the workflow.
Configure the recovery strategy on the Properties page of the Session task.