远程数据容灾系统中数据一致性保持策略研究

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

数据一致性是数据容灾的前提条件。远程数据容灾系统中数据一致性保持策略采用保持主、从两端数据卷上数据块的更新顺序的方法来保证主从数据一致性,并通过一种改进型流水线策略,在保证数据视图一致性的同时优化了系统性能,最后探讨了解决多设备数据一致性的方法。原型实验表明,系统的数据一致性保持策略是有效的。

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.