A customer production center is in Chengdu with a disaster recovery center in Shenzhen, using...

DCM (data change map) is mainly used to ensure that the data in the production center is copied to the disaster recovery center according to the order sent by the host to ensure the data consistency

Production, disaster recovery data volume and disaster recovery must be consistent, the name can be inconsistent

Each business configuration a copy volume group, multiple copy volume group can use the same virtual IP

virtual IP and physical IP must be in the same network segment