Patent ID: 7552295
Filing Date: 2009-06-23
Classification: G06F

Abstract:
1. A method, comprising: forming update groups using a first copy technology having updates to a first primary storage locations, wherein the updates in the update groups are copied to first secondary storage locations; forming update groups using a second copy technology having updates to a second primary storage locations, wherein the updates in the update groups are copied to a second secondary storage locations, wherein the first and second copy technologies perform different operations to copy the data from the primary to the secondary storage locations; indicating, by the first copy technology, in a data structure a time of an update at the first primary storage locations in response to including the update in one of the update groups formed using the first copy technology; indicating, by the second copy technology, in the data structure a time of the update at the second primary storage locations formed using the second copy technology; determining, by the first copy technology, a first consistency group of updates to the first primary storage locations having times less than a reference time based on the times indicated in the data structure; determining, by the second copy technology, a second consistency group of updates to the second primary storage locations having times less than the reference time based on the times indicated in the data structure; copying, by the first copy technology, the first consistency group to the first secondary storage locations; and coordinating, by the second copy technology, with the first copy technology by: copying, by the second copy technology, the second consistency group to the second secondary storage locations, in response to the continue from the first copy technology, wherein the first and second consistency groups copied to the first and second secondary storage locations maintain consistency across the first and second copy technologies, wherein the first copy technology forms consistency groups at a substantially higher frequency than the second copy technology.