Dual-controller active-active mode

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Dual-controller active-active mode (also called as the active-active working mode): Both controllers are simultaneously active and concurrently process I/O requests initiated by application. If one controller fails or becomes offline, the other takes over services without affecting its own services. The active-active mode ensures robust system reliability using controller redundancy. In addition, this mode provides advantages, such as balancing service load, boosting system performance, and improving resource utilization.

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Definition of the dual-controller active-active working mode
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Does an AR support dual uplinks in active and standby mode
An AR with dual WAN interfaces configured can support two uplink interfaces in active and standby mode. 1. Configure two static routes with different priorities. Generally, the data flow is sent out through the active link with a high priority. It is sent out through the backup link with a low priority only after a fault occurs on the active link. 2. Configure policy-based routing. Generally, the data flow is sent out through the active link through on policy-based routing. It is sent out through the standby link based on the default route in the routing table after a fault occurs on the active link.

Introduction to OceanStor ReplicationDirector in the data center disaster recovery solution (active-active mode)
The solution uses the VIS mirror function to mirror host services from the production center to the remote disaster recovery center. This achieves disaster recovery protection at zero RPO and RTO. This solution also supports the tri-mirror function, enhancing data reliability and can use VIS snapshots of protected objects to roll back data, preventing data loss and virus attacks. 1. The solution uses the VIS mirror function to mirror host services from production center 1 to production center 2. Both data centers work concurrently to share service loads, improving disaster recovery service capability and system resource utilization. The data centers are mutually backed up. If one data center fails, the other takes over its services, ensuring business continuity. 2. In this solution, deploy one piece of OceanStor ReplicationDirector to manage disaster recovery services in the active-active data centers. You are advised to deploy OceanStor ReplicationDirector at the active-active disaster recovery center. The OceanStor ReplicationDirector Agent automatically detects the applications on hosts and the storage systems used by the applications. The OceanStor ReplicationDirector Server automatically identifies the configurations of the active-active disaster recovery solution and formulates disaster recovery protection policies. 3. This solution supports the active-active (VIS) technology.

Deployment mode of OceanStor ReplicationDirector in the data center disaster recovery solution (active-active mode)
Deploy one piece of OceanStor ReplicationDirector to manage disaster recovery services in the active-active data centers. Deploy OceanStor ReplicationDirector at the active-active disaster recovery center and ensure that the service system at the active-active production center can communicate with the storage management network.

Application types supported by OceanStor ReplicationDirector in the disaster recovery data center solution (active-active mode)
The disaster recovery data center solution (active-active mode) supports the following applications:

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