Other such writers might be Exchange Server, etc. In such a scenario, SQL Server (including the SQL writer) is acting as a writer in one of the Writer boxes. This diagram shows all the components participating in a typical VSS snapshot activity. VSS provides coordination between these parties: Our design is focused on the scenario where the requestor is a backup application. Requestors initiate the creation and destruction of shadow copies.Writers are applications that change data and participate in the shadow copy synchronization process.Providers own the shadow copy data and instantiate the shadow copies. VSS coordinates the activities of the following cooperating components: The VSS service starts on demand therefore, for VSS operations to be successful, this service must be enabled. Implements the low-level driver functionality necessary for any provider to work.Coordinates activities of providers, writers, and requestors in the creation and use of shadow copies.Though largely transparent to both user and developer, VSS: VSS provides the system infrastructure for running VSS applications on Windows systems. It also captures details on how to configure and use the SQL writer to work with backup applications in the VSS framework. This paper describes the SQL writer component and its role in the VSS snapshot creation and restores process for SQL Server databases. SQL Server provides support for Volume Shadow Copy Service (VSS) by providing a writer (the SQL writer) so that a third-party backup application can use the VSS framework to back up database files.
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