Home > Storage > PowerScale (Isilon) > Product Documentation > Data Protection > Dell PowerScale SmartSync > Base and concrete policies
In a typical environment, administrators manage several data replication policies. The number of replication policies could range from one to many on a cluster, creating an overhead of policy management. SmartSync introduces a concept of base and concrete policies. The base policy is a set of fields that applies to concrete policies. The concrete policy uses the predefined set of fields from the base policy.