Patent ID: 8539179
Filing Date: 2013-09-17
Classification: G06F

Abstract:
1. A computer-implemented method, at least a portion of the method being performed by a computing system comprising at least one processor, the method comprising: creating a first backup of a set of data units at a first point in time; creating, at a second point in time, a representation of one or more data units in the set of data units that have been modified since the first point in time, wherein the representation of one or more data units that have been modified since the first point in time comprises: creating, based at least in part on the representation of one or more data units that have been modified since the first point in time, a delta that comprises data for updating the first backup to a second backup by comparing the first, second, and third bitmaps, wherein the delta represents a difference between the state of the set of data units at the first point in time and the state of the set of data units at the second point in time, and the data for updating the first backup to the second backup comprises: using the delta to update the first backup to the second backup that comprises modifications made to the set of data units between the first and second points in time, wherein using the delta to update the first backup comprises updating data units in the first backup with the at least one data unit that was modified between the first and second points in time.