Dear Alax,
There are two solutions for 3 way DR active-active: HyperMetro and SyncReplication.
HyperMetro is Huawei's active-active storage solution that enables two storage systems to process services simultaneously, establishing a mutual backup relationship between them. If one storage system malfunctions, the other one will automatically take over services without data loss or interruption. With HyperMetro being deployed, you do not need to worry about your storage systems' inability to automatically switch over services between them and will enjoy rock-solid reliability, enhanced service continuity, and higher storage resource utilization.
A synchronous remote replication session replicates data in real-time from the primary storage system to the secondary storage system. The characteristics of synchronous remote replication are as follows:
After receiving a write I/O request from a host, the primary storage system sends the request to the primary and secondary LUNs.
The data write result is returned to the host only after the data is written to both primary and secondary LUNs. The data write result is determined by whether the data is successfully written to the primary LUN and is irrelevant to the secondary LUN. If data fails to be written to the primary LUN or secondary LUN, the primary LUN or secondary LUN returns a write I/O failure to the remote replication management module. Then, the remote replication management module changes the mode from dual-write to single-write, and the remote replication is interrupted.
Thanks.
