Hello, dear!

Have a nice day!

1. A VDC operator applies for a VHA service instance.

2. After receiving a task of creating DR protection, OceanStor BCManager eReplication invokes Nova API to query volumes mounted to ECSs/BMSs.

3. OceanStor BCManager eReplication invokes Cinder API to create secondary HyperMetro volumes on corresponding HyperMetro storage devices.

4. OceanStor BCManager eReplication invokes DRExtend API to create HyperMetro pairs between primary and secondary volumes. OceanStor BCManager eReplication adds all HyperMetro pairs in a service instance to the HyperMetro consistency group.

5. OceanStor BCManager eReplication invokes Nova API to mount the created HyperMetro LUNs to ECSs/BMSs.

If you want to know more information about VHA, please check the following post:

[Base] Cloud Service: Volume High Availability (VHA)

https://forum.huawei.com/enterprise/en/base-cloud-service-volume-high-availability-vha/thread/656253-893

Hope can help you!

Hello friend!

1. A VDC operator applies for a VHA service instance

2. After receiving the task of creating DR protection, BCManager eReplication invokes Nova API to query the number of volumes mounted to ECSs/BMSs.

3. BCManager eReplication invokes Cinder API to create a HyperMetro secondary volume on the corresponding HyperMetro storage device, and queries the capacity of volumes mounted to ECSs/BMSs and obtains the corresponding storage device information.

4. BCManager eReplication invokes DRExtend API to create HyperMetro pairs between the primary and secondary volumes. BCManager eReplication adds all HyperMetro pairs in the service instance to the HyperMetro consistency group.

5. BCManager eReplication invokes Nova API to mount the created HyperMetro secondary volume to an ECS/BMS.

https://support.huawei.com/enterprise/en/doc/EDOC1100062374/d810bd2a/implementation-principles

Thanks!