Patent ID: 7243115
Filing Date: 2007-07-10
Classification: G06F,Y10S

Abstract:
1. A method implemented on a computer of updating a replica on a destination storage system comprising the steps of: reading, from changed data of the replica, identifiers related to deleted and modified logical groups of data on the replica and placing the deleted and modified logical groups in a temporary store separate from a main store of the replica; wherein the replica is transmitted to the destination storage system from the source storage system as a stream of deleted and modified logical groups of data at predetermined times that are each asynchronous with underlying deletions and modifications to corresponding logical groups of data on the source storage system; creating a set of references in the main store to the deleted and modified logical groups in the temporary store; and after the creating step, deallocating the temporary store while maintaining the references in the main store to the deleted and modified logical groups of data.