Patent ID: 8601225
Filing Date: 2013-12-03
Classification: G06F

Abstract:
1. A method to provide a time-ordered snapshot view on behalf of a host of at least a specified portion of a data container backed up from a first storage system to a second storage system, comprising: initiating an order at the host to obtain a view of the data container, the order specifying a date and time of the ordered view; accessing, at a server, the second storage system in accordance with the date and time of the ordered view and accessing an applicable data write representing a data change to the data container upon the receipt of the order at the server; and assembling the snapshot view appropriate to the date and time specified in the order through logically one of: rolling up and rolling back data associated with the data container in accordance with an existing time reference adopting the data change, the assembling including replacing, if existent, at least one old data write to the data container with the data change, the server providing a capability to both logically roll up and logically roll back the data associated with the data container in accordance with the existing time reference, and a data write overwritten at a point in time to change to another data write being invisible at the point in time of the another data write in the snapshot view.