About backing up VSS-aware databases

Article:HOWTO21356  |  Created: 2009-01-29  |  Updated: 2013-10-17  |  Article URL http://www.symantec.com/docs/HOWTO21356
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About backing up VSS-aware databases

Symantec Backup Exec System Recovery integrates with Microsoft Volume Shadow Copy Service (VSS) to automate the process of backing up VSS-aware databases such as the following:

  • Exchange Server 2003 or later

  • SQL Server 2005 or later

  • Windows Server 2003-based domain controller or later

VSS-aware databases are auto-enabled and cannot be turned off. VSS lets administrators create a shadow copy backup of volumes on a server. The shadow copy includes all files and includes open files.

When it creates a recovery point, Backup Exec System Recovery alerts the Volume Shadow Copy Service. VSS then puts the VSS-aware databases into a temporary sleep state. While in this quiesced state, the database continues to write to transaction logs during the backup. After the databases are quiesced, Backup Exec System Recovery takes the snapshot. VSS is then notified that a snapshot is completed. The databases are awakened, and the transaction logs continue to be committed to the database. Meanwhile, the recovery point is created. The databases are only quiesced for the snapshot, and are active for the rest of the recovery point creation.

Backup Exec System Recovery supports Exchange Server 2003 or later, which implements Microsoft’s Volume Shadow Copy Service (VSS) technology. However, if the database load is heavy, the VSS request might be ignored. Create recovery points at the lightest load time.

Be sure that you have installed the latest service packs for your given database.

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