Configuring optimized duplication
Optimized duplication allows NetBackup to efficiently copy backup images between two SpanFS storage servers by transferring only the required data blocks. It uses the OpenStorage (OST) interface to enable direct communication between the source and target SpanFS clusters, resulting in faster duplication and reduced network usage.
Optimized duplication is configured using a Storage Lifecycle Policy (SLP) after the required storage objects are created on both the source and target NetBackup domains.
Before you configure optimized duplication, ensure that:
The source and target SpanFS clusters are paired.
Storage domains and LSUs are created and paired between the clusters.
Both SpanFS clusters are added as storage servers in NetBackup.
Disk pools and storage units are created on both the source and target NetBackup domains.
Note:
If an LSU is created or updated after the disk pool is created, update the disk pool to discover the changes before configuring optimized duplication.
When the storage lifecycle policy is created, NetBackup establishes the pairing between the source and target SpanFS clusters, along with their associated storage domains and LSUs, if the pairing does not already exist.
To configure optimized duplication
- In the NetBackup web UI, on the left, click Storage > Storage lifecycle policies.
- Click Add to create a new storage lifecycle policy.
- On the Storage lifecycle policy page, enter the storage lifecycle policy name.
(Optional) Configure Data classification and Priority for secondary operations.
- Click Add to add an operation.
- In the New operation window:
From the Operation list, select Backup.
Under Destination storage attributes, select the source storage unit backed by the source SpanFS cluster.
Configure the required Retention settings.
Click Create to add the backup operation.
- Select the Backup operation in the operations table, and then click Add child.
- In the New operation window:
From the Operation list, select Duplication.
Under Destination storage attributes, select the target storage unit associated with the target SpanFS cluster.
Configure the required Retention settings.
(Optional) Configure duplication options such as Alternate read server.
- (Optional) Configure additional settings, such as postponing the duplication until the source copy is about to expire.
- Click Create to add the duplication operation.
- Review the storage lifecycle policy configuration, and then click Create.
The storage lifecycle policy is created and can be used by backup policies to perform optimized duplication.