Page Comparison

A global deduplication policy is used to configure and manage the Deduplication Database (DDB) and the deduplication store. It functions as a deduplication engine such that it is not used to manage subclient data, retention settings, or secondary copies.

A global deduplication policy works by linking storage policy copies to a single DDB and store to centrally manage deduplicated data. Linking storage policy copies allows data to be managed independently by a specific data storage policy, while maintaining a more efficient deduplication ratio. Each policy can manage specific subclient content and independently manage retention and additional copies. This provides for efficient deduplication ratios while providing scalability and flexibility for different data protection requirements.

Global Deduplication for Base Storage Policy Design

Always use global deduplication policies as your base store and link storage policy copies to the global deduplication policy. This provides better deduplication ratios as your environment changes and grows. Even if one storage policy is initially required, the primary copy managing data should be associated with a global deduplication policy.

Additionally, you can link subsequent policies (if required) to the global deduplication policy, which results in better ratios and provides more flexibility for defining retention policies or consolidating remote location data to a central policy.

It is important to note that associating or not associating a storage policy copy with a global deduplication policy can only be done at the creation of the policy copy. Once the copy is created, it will either be part of a global policy or it won't.

Global Deduplication for Consolidating Multiple Remote Sites

Global deduplication storage policies can be used to consolidate remote site data to a central location. Remote backups can be performed locally at each location and then use DASH Copy operations to copy the data to a central data center location. Since duplicate blocks may exist at each of the sites, using a global deduplication storage policy associated with a secondary copy can use a single DDB and a single store to consolidate data blocks from all remote locations.

Global deduplication policies for remote office data consolidation

Data Management Storage Policies

Data management storage policies are used to define data protection requirements for subclient data. When the storage policy is initially configured, it is associated with a global deduplication policy.

When secondary copies are created, they can also be associated with global deduplication policies. However, copies within the same storage policy must be associated with different global deduplication storage policies.