Patent ID: 8762336
Filing Date: 2014-06-24
Classification: G06F

Abstract:
1. One or more computer storage memories having computer-executable instructions embodied thereon that, when executed, cause a computing device to perform a method of ensuring consistency across a replicated data storage system, the method comprising: receiving, at a secondary data store, a message from a primary data store, said message comprising an identifier for a previous checkpoint, current checkpointing information, and an incremental difference checksum; creating a current local checkpoint in accordance with the current checkpointing information; using said previous checkpoint identifier to load a previous local checkpoint; obtaining an incremental difference set between said previous local checkpoint and said current local checkpoint; calculating a local incremental difference checksum over said incremental difference set; comparing said local incremental difference checksum to the received incremental difference checksum to determine if a discrepancy has been introduced between data stored at the primary data store and data stored at the secondary data store; and determining that said discrepancy exists based on said comparison by: