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English
  • PowerExchange for CDC and Mainframe 10.5
  • All Products

Table of Contents

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  1. Preface
  2. Introduction to PowerExchange Bulk Data Movement
  3. PowerExchange Listener
  4. Adabas Bulk Data Movement
  5. Datacom Bulk Data Movement
  6. DB2 for i5/OS Bulk Data Movement
  7. DB2 for Linux, UNIX, and Windows Bulk Data Movement
  8. DB2 for z/OS Bulk Data Movement
  9. IDMS Bulk Data Movement
  10. IMS Bulk Data Movement
  11. Microsoft SQL Server Bulk Data Movement
  12. Oracle Bulk Data Movement
  13. Sequential File Bulk Data Movement
  14. VSAM Bulk Data Movement
  15. Writing Data with Fault Tolerance
  16. Monitoring and Tuning Options

Bulk Data Movement Guide

Bulk Data Movement Guide

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Modes of Writing Data to PowerExchange Targets

Modes of Writing Data to PowerExchange Targets

PowerExchange can write data to databases in the following modes:
  • Synchronous
    . PowerExchange sends a block of data to the PowerExchange Listener and waits for a response before sending another block. This mode preserves data integrity and recoverability but degrades performance.
  • Asynchronous
    . PowerExchange sends a block of data to the PowerExchange Listener and does not wait for a response before sending another block of data. This mode provides optimal performance but no recoverability.
  • Asynchronous with Fault Tolerance
    . PowerExchange sends blocks of data to the PowerExchange Listener asynchronously. The PowerExchange Listener writes errors to log files based on how you configured items such as the error handling, update strategy, error threshold, and reject files. Use this mode to optimize performance and to log errors based on the fault tolerance requirements of your site.
You can specify the write mode either in a PowerExchange Client for PowerCenter (PWXPC) database connection attribute or from the Windows ODBC Data Source Administrator.
The following table shows how to set the PWXPC
Write Mode
 connection attribute or ODBC Write Mode setting for each write mode:
Write Mode
PWXPC Write Mode Setting
ODBC Write Mode Setting
Synchronous
Confirm Write On 
CONFIRMWRITE = Y
On the PowerExchange
Data Source
 tab of the Windows ODBC Data Source Administrator, select
Confirm Write On
 in the
Write Mode
 list.
Asynchronous
Confirm Write Off 
CONFIRMWRITE = N
On the PowerExchange
Data Source
 tab of the Windows ODBC Data Source Administrator, select
Confirm Write Off
 in the
Write Mode
 list.
Asynchronous with Fault Tolerance
Asynchronous with Fault Tolerance
Available only for PWX DB2zOS, PWX DB2i5OS, PWX DB2LUW, PWX MSSQL Server, and PWX Oracle relational connections. 
CONFIRMWRITE = T
On the PowerExchange
Data Source
 tab of the Windows ODBC Data Source Administrator, select
Asynchronous With Fault Tolerance
 in the
Write Mode
 list.
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