虚拟设备接口 (VDI) 引用Virtual device interface (VDI) reference

适用于:Applies to: 是SQL ServerSQL Server(所有支持的版本)yesSQL ServerSQL Server (all supported versions) 适用于:Applies to: 是SQL ServerSQL Server(所有支持的版本)yesSQL ServerSQL Server (all supported versions)

本节包含供第三方备份软件供应商使用的 SQL Server 应用程序编程接口规范。This section contains the specifications for SQL Server application programming interfaces intended for use by third-party backup software vendors.

概述Overview

虚拟设备接口 (VDI) 提供最高的联机备份吞吐量和最小的事务工作负载降级,以及最快的恢复时间。The virtual device interface (VDI) provides the highest online backup throughput with minimal degradation to the transaction workload, as well as the fastest possible restore times. 它使第三方供应商能够实现与 SQL Server 本地备份/还原相同的性能特征,并提供全方位的备份/还原功能。It enables third party vendors to achieve the same performance characteristics as the SQL Server native backup/restore, and makes the full range of backup/restore functionality available. VDI 是在 SQL Server 7.0 中引入的并在更高版本中受支持且得到增强。VDI was introduced in SQL Server 7.0 and is supported and enhanced in later versions.

VDI 支持两种主要类型的备份技术:VDI supports two primary types of backup technologies:

  • 常规的联机备份:读取备份集的全部内容并将其传输到备份媒体。Conventional online backups where the entire contents of the backup set is read and transferred to the backup media.

  • 快照备份:使用底层拆分镜像或写入时复制技术。Snapshot backups using underlying split-mirror or copy-on-write technology.

通过 VDI 完成的常规联机备份可以利用 SQL Server 中备份和还原的全部功能。Conventional online backups done through VDI can take advantage of the full range of features of backup and restore in SQL Server. 快照备份仅限于完整数据库和文件/文件组备份。Snapshot backups are limited to full database and file/filegroup backups only. 但是,快照备份可以使用传统的数据库差异、文件差异和事务日志备份进行前滚。However, snapshot backups may be rolled forward with conventional database differential, file differential, and transaction log backups.

后续步骤Next steps

查看此部分中的 VDI 参考文档。Review the VDI reference documentation in this section.

下载完整规范和支持的源文件:Download the full specification and the supporting source files:

SQL Server 2005 虚拟备份设备接口 (VDI) 规范SQL Server 2005 Virtual Backup Device Interface (VDI) Specification