Research of Holding Data Consistency Strategy in Remote Data Disaster Tolerance System

Data consistency is the precondition of data disaster tolerance.Holding data consistency strategy in the remote data disaster tolerance system maintains primary-backup data consistency by keeping block update order between primary and backup volumes,and maintains data view consistency through an improved pipeline strategy,and optimizes the system performance at the same time,finally discussing the method to resolve the multi-facility data consistency.The antitype experiment shows that it is effective of the holding data consistency strategy in this system.