Build Your own DIY home or lab Storage Spaces Direct Cluster orderd from ebay Part 1

So i built a 2 node S2D cluster  a while ago at home on some old HP G6 nodes i got cheap. But have decided to get rid of that and setup a new 3 node cluster with bit’s i can find on ebay. And reuse disks i have. This will be a multipart blog post as the parts are orderd and they come in. And during the build process. I will provide a step by step guide in building it, installing, configuring, monitoring and troubleshooting Storage Spaces Direct. Including switch config.

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RoCE/RDMA/DCB what is it and how to configure it

You have probably heard these acronyms somewhere, so what are these and are they the same. In short yes and no

RoCE stands for RDMA over Converged Ethernet, the RDMA part is Remote Direct Memory Access.

RDMA allows for network data(TCP packets) to be offloaded on the Network cards and put directly in to the memory, bypassing the hosts CPU. Allowing for the host to have all the access to the CPU. In normal TCP offload all the network traffic goes trough the CPU and with higher speeds will take more CPU. On a 10gbit network it would take about 100% cpu on a 12 core Intel Xeon V4 CPU. Read more