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English
  • PowerExchange for CDC and Mainframe 10.4.0
  • All Products

Table of Contents

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  1. Preface
  2. Change Data Capture Introduction
  3. PowerExchange Listener
  4. PowerExchange Condense
  5. DB2 for i5/OS Change Data Capture
  6. Remote Logging of Data
  7. Introduction to Change Data Extraction
  8. Extracting Change Data
  9. Monitoring CDC Sessions
  10. Managing Change Data Extractions
  11. Tuning CDC Sessions
  12. Appendix A: DTL__CAPXTIMESTAMP Time Stamps

CDC Guide for i5/OS

CDC Guide for i5/OS

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Determining the Restart Tokens for Cold Start Processing

Determining the Restart Tokens for Cold Start Processing

When you cold start a CDC session, PWXPC uses the restart token file to determine the restart tokens for all sources. PWXPC ignores any entries in the state tables or state file for the sources in the CDC session.
More specifically, PWXPC uses one of the following methods to determine the restart tokens:
  • If the restart token file is empty or does not exist, PWXPC assigns null restart tokens to all sources in the CDC session.
  • If the restart token file contains only explicit override statements, PWXPC performs the following processing:
    • Assigns the restart tokens in the explicit override statements to the specified sources.
    • Assigns the oldest supplied restart point to any sources for which an explicit override statement was not specified.
  • If the restart token file contains only the special override statement, PWXPC assigns the restart tokens in the special override statement to all sources.
  • If the restart token file contains a special override statement and explicit override statements, PWXPC performs the following processing:
    • Assigns the restart tokens in the explicit override statements to the specified sources.
    • Assigns the restart tokens in the special override statement to all remaining sources.
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