Backup and Copy Precedence Considerations for Virtualization Restores

For users in an environment with Commvault Indexing Version 1 (VSA V1), the user needs to have view permission for the storage policy/backup plan, in addition to the Use plan permission for the storage policy/backup plan described later in this topic to have permission to view copy precedence.

By default, the Commvault Cloud software selects the Backup Gateway for the restore operation based on availability and environment using the Automatic option. However, during a restore, you can select a specific Backup Gateway to use instead of the default option. If you select a Backup Gateway, the certain conditions must be met or the Commvault Cloud software selects the best alternative.

  • The Backup Gateway must be available.

  • The Backup Gateway must have read and write access permissions to the on-premises library.

  • The Backup Gateway must support the respective file system format of the VM disks. (For example, don't select a Linux Backup Gateway to browse a Windows guest VM backed up on a Windows Backup Gateway.)

Live Mount Operations

Live mount operations always use the Backup Gateway configured in the virtual machine policy, regardless of the Backup Gateway you select during the restore process.

Backup Gateways That Do Not Have a Storage Accelerator

A storage accelerator allows an access node or a Backup Gateway to read data from the cloud library.

If the Backup Gateway you specify is not enabled with a storage accelerator, but resides on an access node that is enabled with a storage accelerator, then the Commvault Cloud software selects the Backup Gateway based on the following priorities:

  • Storage accelerator/LAN free

  • User-specified Backup Gateway

  • Geographic proximity

If the Commvault Cloud software selects a Backup Gateway other than the one you chose, then that information is included in the logs.

Copy Precedence

By default, the restore operation searches for the requested data in the primary copy and selects a different copy if the data is not found in the primary copy using the Automatic option. However, you can select a specific source copy instead of using the default option. By default, the restore operation searches for the requested data in the primary copy and selects a different copy only if the data is not found in the primary copy.

  • To view copy precedence you must have the Use plan permission on the associated backup plan.

  • All users, except VM end users, will be able to see copy precedence.

  • If workload regions are assigned to the destination client computer and associated storage pools, you can allow restore operations with Automatic copy precedence to select the source copy from a storage pool that is located closer to the destination client region.

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