1. A method of operating a physical archive cluster, the cluster comprising a plurality of nodes, wherein each node comprises a processor, a data store coupled to the processor, and an application stored in the data store and executed by the processor, the method comprising: associating one or more tenants with the archive cluster; logically partitioning the archive cluster into a set of one or more namespaces, wherein one or more namespaces are associated with a given tenant, and wherein a namespace comprises a collection of data objects for at least one application and has associated therewith a private file system with respect to other namespaces in the set of namespaces; and selectively configuring a namespace associated with a given tenant to change a configuration for data objects belonging to the namespace without affecting a configuration for other data objects belonging to at least one other namespace in the set of namespaces.