Table of Contents

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  1. Preface
  2. Analyst Service
  3. Content Management Service
  4. Data Integration Service
  5. Data Integration Service Architecture
  6. Data Integration Service Management
  7. Data Integration Service Grid
  8. Data Integration Service Applications
  9. Metadata Manager Service
  10. Model Repository Service
  11. PowerCenter Integration Service
  12. PowerCenter Integration Service Architecture
  13. High Availability for the PowerCenter Integration Service
  14. PowerCenter Repository Service
  15. PowerCenter Repository Management
  16. PowerExchange Listener Service
  17. PowerExchange Logger Service
  18. SAP BW Service
  19. Search Service
  20. System Services
  21. Test Data Manager Service
  22. Web Services Hub
  23. Application Service Upgrade
  24. Application Service Databases
  25. Connecting to Databases from Windows
  26. Connecting to Databases from UNIX
  27. Updating the DynamicSections Parameter of a DB2 Database

Cache Files

Cache Files

The DTM creates at least one cache file for each Aggregator, Joiner, Lookup, Rank, and Sorter transformation included in a mapping, profile, SQL data service, or web service operation mapping.
If the DTM cannot process a transformation in memory, it writes the overflow values to cache files. When the job completes, the DTM releases cache memory and usually deletes the cache files.
By default, the DTM stores cache files for Aggregator, Joiner, Lookup, and Rank transformations in the list of directories defined by the Cache Directory property for the Data Integration Service. The DTM creates index and data cache files. It names the index file
PM*.idx
, and the data file
PM*.dat
.
The DTM stores the cache files for Sorter transformations in the list of directories defined by the Temporary Directories property for the Data Integration Service. The DTM creates one sorter cache file.