1. A system comprising: a plurality of near-line server computers coupled to one or more servers that include original data, the plurality of near-line server computers comprising a first near-line server coupled to a second near-line server; and an information system coupled to the plurality of near-line server computers and configured to execute under processor control and receive a copy of original data and delta data that includes data of at least one of an incremental difference and a differential difference between the original data at a plurality of instances, wherein the information system is application aware, the information system configured to continuously generate and maintain in computer storage associated with the first near-line server an updated version of the copy by applying the delta data to the copy as the delta data is received, the information system generating and maintaining a replica of the updated version in computer storage associated with the second near-line server, the information system configured to dynamically transform the updated version from a first structure by organizing items of the data into a second structure that preserves the hierarchy of the first structure including indexing difference information corresponding to modified items of data.