RDMA Over RoCE With DCB Requires Tagged Non Default VLANs

It’s DCB That Requires This For those of you who are experimenting with the RoCE variant of RDMA for SMB Direct in Windows Server 2012 (R2), make sure you have a VLAN tag in your configuration if this is more … Continue reading

Upgrading Firmware Of Mellanox RoCE Cards for Final Windows Server 2012 RDMA Testing

Upgrading Mellanox Firmware As we are preparing to roll out Windows Server 2012 R2 we are also updating the Mellanox cards we have. At the moment of writing the final driver & firmware for Windows Server 2012 R2 isn’t out … Continue reading

Adventures In RDMA – The RoCE Path Over DCB To Windows Server 2012 R2 SMB 3.0 Glory

Prologue On gloomy day, it was dark, grey and cold, we gave battle with RoCE & DCB (PFC/ETS). The fight was a long one, the battle field uncharted and we had only our veteran attitude towards adversity to guide us … Continue reading

Preliminary Results With Live Migration Over RDMA Speed & Useful Number Of NICs

Introduction With Windows Server 2012 R2 (Preview) we can leverage SMB to do Live Migrations. That means we can now offload the process to the NIC if they support RDMA, save on CPU cycles and potentially get VMs moves a … Continue reading