Disaster recovery solutions have gained popularity in the past few years because of their ability to tolerate disasters and to achieve the reliability and availability. Data replication is one of the most key disaster recovery solutions. While there are a number of mechanisms to restore data after disasters, the efficiency of the recovery process is not ideal yet. Providing the efficiency guarantee in replication systems is important and complex because the services must not be interrupted and the availability and continuity of businesses must be kept after disasters. To recover the data efficiently, we (1) present a fast disaster recovery mechanism, (2) implement it in a volume replication system, and (3) report an evaluation for the recovery efficiency of the volume replication system. It's proved that our disaster recovery mechanism can recover the data at the primary system as fast as possible and achieve the ideal recovery efficiency. Fast disaster recovery mechanism can also be applicable to other kinds of replication systems to recover the data in the event of disasters.
['Yanlong Wang', 'Zhanhuai Li', 'Wei Lin']
A fast disaster recovery mechanism for volume replication systems