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Copy file name to clipboardExpand all lines: articles/data-factory/copy-activity-performance-features.md
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@@ -87,8 +87,8 @@ The following table lists the parallel copy behavior:
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| Between file stores |`parallelCopies` determines the parallelism **at the file level**. The chunking within each file happens underneath automatically and transparently. It's designed to use the best suitable chunk size for a given data store type to load data in parallel. <br/><br/>The actual number of parallel copies copy activity uses at run time is no more than the number of files you have. If the copy behavior is **mergeFile** into file sink, the copy activity can't take advantage of file-level parallelism. |
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| From file store to non-file store | - When copying data into Azure SQL Database or Azure Cosmos DB, default parallel copy also depend on the sink tier (number of DTUs/RUs).<br>- When copying data into Azure Table, default parallel copy is 4. |
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| From non-file store to file store | - When copying data from partition-option-enabled data store (including [Azure SQL Database](connector-azure-sql-database.md#azure-sql-database-as-the-source), [Azure SQL Managed Instance](connector-azure-sql-managed-instance.md#sql-managed-instance-as-a-source), [Azure Synapse Analytics](connector-azure-sql-data-warehouse.md#azure-synapse-analytics-as-the-source), [Oracle](connector-oracle.md#oracle-as-source), [Amazon RDS for Oracle](connector-amazon-rds-for-oracle#amazon-rds-for-oracle-as-source), [Netezza](connector-netezza.md#netezza-as-source), [SAP HANA](connector-sap-hana.md#sap-hana-as-source), [SAP Open Hub](connector-sap-business-warehouse-open-hub.md#sap-bw-open-hub-as-source), [SAP Table](connector-sap-table.md#sap-table-as-source), [SQL Server](connector-sql-server.md#sql-server-as-a-source), [Amazon RDS for SQL Server](connector-amazon-rds-for-sql-server#amazon-rds-for-sql-server-as-a-source) and [Teradata](connector-teradata.md#teradata-as-source)), default parallel copy is 4. The actual number of parallel copies copy activity uses at run time is no more than the number of data partitions you have. When use Self-hosted Integration Runtime and copy to Azure Blob/ADLS Gen2, note the max effective parallel copy is 4 or 5 per IR node.<br>- For other scenarios, parallel copy doesn't take effect. Even if parallelism is specified, it's not applied. |
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| Between non-file stores | - When copying data into Azure SQL Database or Azure Cosmos DB, default parallel copy also depend on the sink tier (number of DTUs/RUs).<br/>- When copying data from partition-option-enabled data store (including [Azure SQL Database](connector-azure-sql-database.md#azure-sql-database-as-the-source), [Azure SQL Managed Instance](connector-azure-sql-managed-instance.md#sql-managed-instance-as-a-source), [Azure Synapse Analytics](connector-azure-sql-data-warehouse.md#azure-synapse-analytics-as-the-source), [Oracle](connector-oracle.md#oracle-as-source), [Amazon RDS for Oracle](connector-amazon-rds-for-oracle#amazon-rds-for-oracle-as-source), [Netezza](connector-netezza.md#netezza-as-source), [SAP HANA](connector-sap-hana.md#sap-hana-as-source), [SAP Open Hub](connector-sap-business-warehouse-open-hub.md#sap-bw-open-hub-as-source), [SAP Table](connector-sap-table.md#sap-table-as-source), [SQL Server](connector-sql-server.md#sql-server-as-a-source), [Amazon RDS for SQL Server](connector-amazon-rds-for-sql-server#amazon-rds-for-sql-server-as-a-source) and [Teradata](connector-teradata.md#teradata-as-source)), default parallel copy is 4.<br>- When copying data into Azure Table, default parallel copy is 4. |
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| From non-file store to file store | - When copying data from partition-option-enabled data store (including [Azure SQL Database](connector-azure-sql-database.md#azure-sql-database-as-the-source), [Azure SQL Managed Instance](connector-azure-sql-managed-instance.md#sql-managed-instance-as-a-source), [Azure Synapse Analytics](connector-azure-sql-data-warehouse.md#azure-synapse-analytics-as-the-source), [Oracle](connector-oracle.md#oracle-as-source), [Amazon RDS for Oracle](connector-amazon-rds-for-oracle.md#amazon-rds-for-oracle-as-source), [Netezza](connector-netezza.md#netezza-as-source), [SAP HANA](connector-sap-hana.md#sap-hana-as-source), [SAP Open Hub](connector-sap-business-warehouse-open-hub.md#sap-bw-open-hub-as-source), [SAP Table](connector-sap-table.md#sap-table-as-source), [SQL Server](connector-sql-server.md#sql-server-as-a-source), [Amazon RDS for SQL Server](connector-amazon-rds-for-sql-server.md#amazon-rds-for-sql-server-as-a-source) and [Teradata](connector-teradata.md#teradata-as-source)), default parallel copy is 4. The actual number of parallel copies copy activity uses at run time is no more than the number of data partitions you have. When use Self-hosted Integration Runtime and copy to Azure Blob/ADLS Gen2, note the max effective parallel copy is 4 or 5 per IR node.<br>- For other scenarios, parallel copy doesn't take effect. Even if parallelism is specified, it's not applied. |
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| Between non-file stores | - When copying data into Azure SQL Database or Azure Cosmos DB, default parallel copy also depend on the sink tier (number of DTUs/RUs).<br/>- When copying data from partition-option-enabled data store (including [Azure SQL Database](connector-azure-sql-database.md#azure-sql-database-as-the-source), [Azure SQL Managed Instance](connector-azure-sql-managed-instance.md#sql-managed-instance-as-a-source), [Azure Synapse Analytics](connector-azure-sql-data-warehouse.md#azure-synapse-analytics-as-the-source), [Oracle](connector-oracle.md#oracle-as-source), [Amazon RDS for Oracle](connector-amazon-rds-for-oracle.md#amazon-rds-for-oracle-as-source), [Netezza](connector-netezza.md#netezza-as-source), [SAP HANA](connector-sap-hana.md#sap-hana-as-source), [SAP Open Hub](connector-sap-business-warehouse-open-hub.md#sap-bw-open-hub-as-source), [SAP Table](connector-sap-table.md#sap-table-as-source), [SQL Server](connector-sql-server.md#sql-server-as-a-source), [Amazon RDS for SQL Server](connector-amazon-rds-for-sql-server.md#amazon-rds-for-sql-server-as-a-source) and [Teradata](connector-teradata.md#teradata-as-source)), default parallel copy is 4.<br>- When copying data into Azure Table, default parallel copy is 4. |
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To control the load on machines that host your data stores, or to tune copy performance, you can override the default value and specify a value for the `parallelCopies` property. The value must be an integer greater than or equal to 1. At run time, for the best performance, the copy activity uses a value that is less than or equal to the value that you set.
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