Bufferized Connection types : What gets bufferized ?

All Connection types that are not databases are bufferized :

• RESTful API (web)
• file-based Connections : Excel, CSV
  

Multi-Source case

Multi-Source is a special case : in a Multi-Source context, even database-based Connections are bufferized.

Example :
SQL Connection1 points to your “MESDB” database, and SQL Connection2 points to your “OTHER_DB” database.

You create DataSource1 by making a join between Table1 from Connection1 and Table2 from Connection2.

⇒ Your DataSource1 is a Multi-Source Data Source. It is bufferized.