Backup File Placement for Capacity Tier
Data distribution between capacity extents depends on whether it is the first move or a subsequent move of a backup chain. To select an extent for backup file placement, Veeam Backup & Replication checks the following conditions:
- During the first job session, Veeam Backup & Replication checks availability of extents. In case, an extent is set to Sealed or Maintenance mode, these extents will be skipped from backup file placement.
- After that, Veeam Backup & Replication checks the amount of backup chains in available extents and selects the extent with a minimal amount of backup chains.
- If some extents have storage space limitations, Veeam Backup & Replication calculates the average storage of the backup chains located in all extents and select the extent that contains a minimum amount of backup chains. If all extents have the same number of backup chains, Veeam Backup & Replication selects the extent that has more free space.
- During subsequent job sessions, Veeam Backup & Replication moves backup chains to the extent that was specified before.
If an extent is set to Sealed mode or Maintenance mode, Veeam Backup & Replication will not move a backup chain to this extent. In this case, a new extent is selected and Veeam Backup & Replication follows the same algorithm as during the first job session. The backup chain located in an unavailable extent will be moved again to another extent. Veeam Backup & Replication will remove backup chains from the unavailable extents according to retention policy.