Integration runtime in Azure Data Factory ---

 https://docs.microsoft.com/en-us/azure/data-factory/concepts-integration-runtime

The Integration Runtime (IR) is the compute infrastructure used by Azure Data Factory and Azure Synapse pipelines to provide the following data integration capabilities across different network environments:

• Data Flow: Execute a Data Flow in a managed Azure compute environment.
• Data movement: Copy data across data stores in a public or private networks (for both on-premises or virtual private networks). The service provides support for built-in connectors, format conversion, column mapping, and performant and scalable data transfer.
• Activity dispatch: Dispatch and monitor transformation activities running on a variety of compute services such as Azure Databricks, Azure HDInsight, ML Studio (classic), Azure SQL Database, SQL Server, and more.
• SSIS package execution: Natively execute SQL Server Integration Services (SSIS) packages in a managed Azure compute environment.

In Data Factory and Synapse pipelines, an activity defines the action