Metadata Caching
The Informatica MongoDB ODBC driver caches the schema in the MongoDB database or a flat file. After you define a schema for the collection, you can store the modifications in the MongoDB database or a file so that Informatica Cloud uses the modifications each time you import a definition.
You must change the schema definition if there are updates to the documents that require a change in the definitions that you created in Informatica Cloud.
If you store the schema modification in a file, ensure that the file is available in the location that you configure in the ODBC data source name when you import a source or target object. If you store the schema modification in the MongoDB database, MongoDB Connector stores the schema modification in a collection called Mersenne_Collection_Metadata. If you edit Mersenne_Collection_Metadata, you might lose the schema modifications.
Note: If you clear the metadata cache, you must re-create or re-import the source and target objects with the same metadata that the existing mapping objects use.