vSphere 6.5 and later supports PVRDMA only in environments with a specific configuration.
To use PVRDMA in vSphere 6.5 or later, your environment must meet several configuration requirements.
|Host Channel Adapter (HCA)||
To verify that your physical hosts and HCAs are compatible with ESXi releases, see the VMware Compatibility Guide.
Support for PVRDMA Namespaces
In releases previous to vSphere 7.0, PVRDMA virtualized public resource identifiers in the underlying hardware to guarantee that a physical resource can be allocated with the same public identifier when a virtual machine resumed operation following the use of vMotion to move it from one physical host server to another. To do this, PVRDMA distributed virtual to physical resource identifier translations to peers when creating a resource. This resulted in additional overhead that can be significant when creating large numbers of resources.
PVRDMA namespaces prevents these additional overheads by letting multiple virtual machines coexist without coordinating the assignment of identifiers. Each virtual machine is assigned an isolated identifier namespace on the RDMA hardware, such that any virtual machine can select its identifiers within the same range without conflicting with other virtual machines. The physical resource identifier no longer changes even after vMotion, so virtual to physical resource identifier translations are no longer necessary.
PVRDMA namespaces are enabled automatically on vSphere 7.0 and later with virtual machine hardware version 17 or later. The underlying hardware must also support PVRDMA namespaces. To learn how to enable PVRDMA namespaces on your environment's hardware, refer to the RDMA vendor documentation.
Support for PVRDMA Native Endpoints
PVRDMA native endpoints are supported in virtual machine hardware version 18 and later beginning with vSphere 7.0 Update 1 and later releases. PVRDMA native endpoints allow PVRDMA to communicate with non-PVRDMA endpoints. To use PVRDMA native endpoints, you must enable PVRDMA namespaces. To learn how to enable PVRDMA namespaces on your environment's specific hardware, refer to the RDMA vendor documentation.
You must configure the virtual machine to use PVRDMA native endpoints. See Configure a Virtual Machine to Use PVRDMA Native Endpoints.