DATA RETRIEVAL FROM ARCHIVED DATA STORAGE

A method, a system, and a computer program product for retrieving data from an archived data storage. A query requiring access to data stored in at least one storage location in the plurality of storage locations is received. Based on the received query, at least one first storage location storing the data is determined. One or more hierarchical data models for accessing data stored in the first storage location is generated. The hierarchical data models include a plurality of nodes storing at least a portion in a plurality of portions of the data stored in the first storage location. Using the generated hierarchical data models, a first data responsive to the query is selected and combined with at least a second data stored in at least another storage location in the plurality of storage locations. The combined first data and the second data are retrieved.