Table of Contents

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  1. Preface
  2. Part 1: Introduction
  3. Part 2: PowerExchange Client for PowerCenter (PWXPC)
  4. Part 3: PowerExchange ODBC
  5. Appendix A: PowerExchange Interfaces for PowerCenter Tips
  6. Appendix B: Datatypes and Code Pages
  7. Appendix C: PowerExchange Interfaces for PowerCenter Troubleshooting

PowerExchange Interfaces for PowerCenter

PowerExchange Interfaces for PowerCenter

Configuring CDC Sessions for Restart Processing

Configuring CDC Sessions for Restart Processing

Control PWXPC restart processing with session options and attributes.
The following table summarizes the options and attributes with defaults that must be changed for CDC sessions:
Option or Attribute
Location
Recommended Value and Default
Commit Type
Properties Tab
Specify
Source
.
The default value is Target. The PowerCenter Integration Service automatically overrides the default to Source. Unless this value is Source, you cannot change
Commit On End Of File
.
Commit On End Of File
Properties Tab
Disable this option.
By default, this option is enabled and PowerCenter Integration Service performs a commit when the session ends. This commit occurs after PWXPC commits the restart tokens. As a result, duplicate data can occur on restart.
Recovery Strategy
Properties Tab
Select
Resume from the last checkpoint
. PWXPC requires this setting for recovery.
If you use PowerCenter high availability (HA) option, you must also specify the
Enable HA Recovery
option for the workflow.
If you use a transformation type for which the
Output is Deterministic
option is available, ensure that you select this option. If you use a Lookup transformation, select the
Lookup Source is Static
or
Lookup Cache Persistent
option instead. If you do not select one of these options, you cannot validate the CDC session in Workflow Manager.
The default value is
Fail task and continue workflow
.
Target Load Type
Mapping Tab, Targets Node
Select
Normal
.
The default value is
Bulk
. To use recovery, you must select Normal.
Stop on errors
Config Object Tab
Enter
1
to ensure target data and restart token integrity are maintained.
The default value is 0. With the default, any errors that the PowerCenter Integration Service encounters while writing to the target database or target files are not counted. Writer threshold errors can include key constraint violations, loading nulls into a not null field, and database trigger responses. In this case, PWXPC does not detect that the writer has not applied the data to the target and consequently advances the restart tokens.
Application Name
Application Connection
Specify a unique name.
The default value is the first 20 characters of the workflow name. However, the default might not result in a unique name.
Restart Token File Name
Application Connection
Specify a unique name.
The default is either the application name, or the workflow name if no application name is specified. However, the default might not result in a unique name.
Number of Runs to Keep RestartToken File
Application Connection
Specify a value greater than 0.
The default is 0. With the default, PWXPC keeps only one backup copy of the restart token initialization and termination files. Specify a value greater than 0 to retain history for recovery purposes.

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