The Data Integration Service writes data to the index directory if you do not configure the transformation to write the index data to database tables. The Data Integration Service writes data to the cache directory if the identity analysis requires a greater amount of memory than the cache size specifies. By default, the properties are blank on the Match Type view. If you do not specify an index directory or a cache directory, the Data Integration Service reads the directory paths from the Content Management Service.

When you specify an index directory or a cache directory on the Match Type view, enter a local path on the Data Integration Service machine. You can enter a fully qualified path or a relative path. If you enter a relative path, start the path with a period. The path is relative to the

tomcat/bin

directory on the Data Integration Service machine.

The following table shows a relative path on a cache directory or index directory property and identifies the fully qualified path that the property represents:

Relative Path	Fully Qualified Path
./ch	[Informatica_installation_directory]/tomcat/bin/ch

You can configure the index directory property and the cache directory property to identify the same directory. If you specify the same directory on each property, the Data Integration Service creates directories in the directory that you specify. The Data Integration Service creates an

index

directory for the index data and a

cache

directory for the cache data. If you specify different directories on each property, the Data Integration Service writes the data to the directories that you specify.

The Data Integration Service deletes the index files and the cache files from the directories after the mapping runs. The Data Integration Service does not delete the directories. The Data Integration Service can reuse the directories in other mappings if the Match transformation identifies the directories.