从容量层下载数据的工作原理

To download data from the capacity extent back to the performance extents, Veeam Backup & Replication uses the SOBR Download job.

The SOBR Download job is triggered right after you select the Copy to performance tier option; it collects offloaded blocks of data from the capacity extent and copies them back to the performance extents. For more information, see Downloading from Capacity Tier.

Consider the following:

• Before copying data blocks, Veeam Backup & Replication verifies whether any of such blocks exist on any of the performance extents of your scale-out backup repository. If found, Veeam Backup & Replication will reuse the existing blocks instead of downloading the exact same data from the capacity extent.

• If a performance extent is unable to accommodate data being copied due to lack of free storage space, Veeam Backup & Replication will find another extent in the associated scale-out backup repository that has sufficient storage capacity to receive the data. If your scale-out backup repository has no performance extents other than the one running out of space, the copy will not be possible.

• If you have removed any of the performance extents from a scale-out backup repository without evacuating backup files with metadata, the copy will not be possible until the files with metadata are downloaded back to the performance extents in the course of the rescan process. For more information on the rescan process, see Rescanning Scale-Out Repositories.

Backup files with metadata are created as described in Moving Inactive Backup Chains to Capacity Tier.

• The SOBR download session results are saved to the configuration database and available for viewing, as described in Viewing Download Job Session Results.

Related Topics

• Downloading Data from Capacity Tier
• Evacuating Backups from Performance Extents
• Copying Backups to Capacity Tier
• Moving Inactive Backup Chains to Capacity Tier