Resilient data is data that is replicated (copied) on more than one node in a cluster.
Each node in the recovery domain contains a copy of the resilient data maintained through some replication mechanism. Nodes that are defined as backup in the recovery domain can assume the role of primary point of access for the resilient data. Nodes that are defined as replicates also contain a copy of the data, but cannot assume the role of primary. Typically, data copied to a replicate node is used to offload work, such as backup or read-only queries, from the primary node.