SMB Direct
When using SMB3 storage communication or Live Migration, it is not possible to utilize optimal performance through our existing converged networking design. In this case, it's highly recommended to use RDMA-capable network cards. Add two network cards with RDMA capability to your hosts. Do not team them. Do not use MPIO on them. Configure both to use different subnets, Windows Server will automatically spread the workload between the NICs using SMB multichannel. RDMA enables high-performance networking while using very little CPU load. SMB Direct will be automatically enabled when RDMA-capable NICs are detected on the host.
There are three types of RDMA-aware network architectures available:
ROCE: ROCE stands for RDMA over converged Ethernet and utilizes existing Ethernet network switches. It is complex to implement and as of today, it is not routable by design. For details and implementation guidelines, visit http://bit.ly/1miEA97.
iWARP: iWARP uses a connection-oriented transport...
