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Copy file name to clipboardExpand all lines: docs/database-engine/configure-windows/hardware-offload-enable-configuration-option.md
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title: "Hardware offload enable server configuration option | Microsoft Docs"
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title: "Hardware offload enabled server configuration option | Microsoft Docs"
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description: 'Learn about the "hardware offload enabled" option. '
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ms.custom: ""
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ms.date: 08/17/2022
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The `hardware offload enabled` configuration option allows integrated acceleration and offloading with validated solutions from partners. For more information, see [Integrated acceleration and offloading](../../relational-databases/integrated-acceleration/overview.md).
At installation, backup compression is off by default. The default behavior for backup compression is defined by the **backup compression default** Option server-level configuration option. However, you can override the server-level default when creating a single backup or scheduling a series of routine backups. To change the server-level default, see [View or Configure the backup compression default Server Configuration Option](../../database-engine/configure-windows/view-or-configure-the-backup-compression-default-server-configuration-option.md).
At installation, backup compression is off by default. The **backup compression default** server-level configuration option sets the default behavior for backup compression. However, you can override the server-level default when creating a single backup or scheduling a series of routine backups. To change the server-level default, see [View or Configure the backup compression default Server Configuration Option](../../database-engine/configure-windows/view-or-configure-the-backup-compression-default-server-configuration-option.md).
Copy file name to clipboardExpand all lines: docs/relational-databases/integrated-acceleration/overview.md
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[!INCLUDE [sssql22-md](../../includes/sssql22-md.md)] enables integrated offloading and acceleration with [Intel® QuickAssist Technology (QAT)](https://www.intel.com/content/www/us/en/developer/topic-technology/open/quick-assist-technology/overview.html). You can offload backup compression with Intel® QAT to reduce CPU usage, backup completion times, and reduce storage consumption. To back up or restore databases with accelerated compression, install Intel® QAT drivers. For specific information and instructions to use with SQL Server, see [Configure Intel® QuickAssist Technology (QAT)](use-integrated-acceleration-and-offloading.md).
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## Use case - Backup and restore operations
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## Back up and restore databases
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One use case for integrated acceleration and offloading is [backup compression](../backup-restore/backup-compression-sql-server.md). Compression speeds up backup and restore operations, and saves space. Compression also consumes CPU resources which may impact application performance. Because Intel® QAT is an integrated acceleration and offloading solution, you can use it to back up and restore databases with compression, and reduce the load compression places on the CPU.
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One use case for integrated acceleration and offloading is [backup compression](../backup-restore/backup-compression-sql-server.md). Compression speeds up back up and restore operations, and saves space. Compression also consumes CPU resources which may impact application performance. Because Intel® QAT is an integrated acceleration and offloading solution, you can use it to back up and restore databases with compression, and reduce the load compression places on the CPU.
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Backup compression is enabled by including the COMPRESSION keyword for BACKUP T-SQL commands, and is now available with an ALGORITHM parameter to choose between MS_XPRESS (default) and QAT_DEFLATE. For information about how to compress backups, see [Configure Backup Compression (SQL Server)](../backup-restore/configure-backup-compression-sql-server.md).
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## Edition specific capabilities
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Integrated acceleration and offloading is supported starting with [!INCLUDE[sssql22-md](../../includes/sssql22-md.md)] on Windows.
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Integrated acceleration and offloading are supported starting with [!INCLUDE[sssql22-md](../../includes/sssql22-md.md)] on Windows.
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- Enterprise edition supports hardware offloading - can use a physical device. If no device is available, it falls back to software based compression.
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- Standard edition supports software compression. Standard edition does not offload to hardware even if a device is available.
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- Express edition allow compressed backups to be restored if the drivers are available. All editions lower than SQL Server Standard edition will only allow backups to be performed with the default MS_XPRESS algorithm.
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- Express edition allows compressed backups to be restored if the drivers are available. All editions lower than SQL Server Standard edition will only allow backups to be performed with the default MS_XPRESS algorithm.
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> [!NOTE]
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> Hardware is not required to successfully restore a previously compressed backup, regardless of the SQL Server edition. However, to back up or restore databases with accelerated compression, you must install product drivers.
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## Limitations
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Integrated acceleration and offloading requires Windows operating system. It is not available on Linux or containers.
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Integrated acceleration and offloading are not available on Linux or containers.
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1. Restart the SQL Server instance. You need to restart the SQL Server instance after you run a command to `SET HARDWARE_OFFLOAD = ...`.
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1. After you restart the instance, query [sys.dm_server_accelerator_status (Transact-SQL)](../system-dynamic-management-views/sys-dm-server-accelerator-status-transact-sql.md) to verify the configuration..
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1. After you restart the instance, query [sys.dm_server_accelerator_status (Transact-SQL)](../system-dynamic-management-views/sys-dm-server-accelerator-status-transact-sql.md) to verify the configuration.
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## Disable offloading and acceleration
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[!INCLUDE [sssql22-md](../../includes/sssql22-md.md)] introduces an `ALGORITHM` extension for backup compression for [BACKUP (Transact-SQL)](../../t-sql/statements/backup-transact-sql.md#compression).
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The T-SQL BACKUP command WITH COMPRESSION has been extended to allow for a specified backup compression algorithm. When using Intel® QAT for backup compression acceleration, the algorithm QAT_DEFLATE initiates an Intel® QAT compressed backup if the drivers are available and the SQL Server configuration has been completed successfully as illustrated in the previously documented steps.
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The T-SQL BACKUP command WITH COMPRESSION has been extended to allow for a specified backup compression algorithm. For backup compression acceleration, Intel® QAT uses an algorithm called QAT_DEFLATE. If the drivers are available and the SQL Server configuration has been completed successfully as illustrated in the previously documented steps, WITH COMPRESSION initiates an Intel® QAT compressed backup.
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> [!NOTE]
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> The standard compression algorithm is MS_XPRESS and is default compression option.
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The status of these options is reflected in the [sys.configurations (Transact-SQL)](../system-catalog-views/sys-configurations-transact-sql.md). View the configuration of offload and acceleration configuration with the [sys.dm_server_accelerator_status (Transact-SQL)](../system-dynamic-management-views/sys-dm-server-accelerator-status-transact-sql.md) dynamic management view.
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The `backup compression algorithm` configuration changes the backup compression algorithm default for backup compression. Changing this option will change the default algorithm when the algorithm is not specified on the `BACKUP .. WITH COMPRESSION` command.
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The `backup compression algorithm` configuration changes the backup compression algorithm default for backup compression. Changing this option will change the default algorithm when the algorithm is not specified on the `BACKUP ... WITH COMPRESSION` command.
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You can view the current default settings for the backup compression in [sys.configurations (Transact-SQL)](../system-catalog-views/sys-configurations-transact-sql.md), for example:
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