A disaster recovery system contains two or more identical service systems deployed on geographically dispersed sites. The disaster recovery system monitors the service systems and maintains data consistency among them. When one service system fails, its services fail over to another site to ensure service continuity. UIS supports storage replication-based disaster recovery and disk backup-based disaster recovery.
SRM as a service enables you to perform storage replication-based disaster recovery for CloudOS VMs created in UIS. The configuration of SRM as a service is similar to that of storage replication-based disaster recovery. To use SRM as a service, select SRM as a service as the service type when you create a protection group.