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Faster Fabrics Running Against Limits of the Operating System, the Processor, and the I/O Bus

Christopher Lameter from Jump Trading gave this talk at the OpenFabrics Workshop in Austin. “In 2017 we got 100G fabrics, in 2018 200G fabrics and in 2019 it looks like 400G technology may be seeing a considerable amount of adoption. These bandwidth compete with and sometimes are higher than the internal bus speeds of the servers that are connected using these fabrics. I think we need to consider these developments and work on improving fabrics and the associated APIs so that ways to access these features become possible using vendor neutral APIs. It needs to be possible to code in a portable way and not to a vendor specific one.”

New Types of Memory, their support in Linux, and how to use them via RDMA

Christoph Lameter from Jump Trading LLC gave this talk at the OpenFabrics Workshop. “Recently new types of memory have shown up like HBM (High Bandwidth Memory), Optane, 3DXpoint, NVDIMM, NVME and various “nonvolatile” types memory. This talk gives a brief rundown on what is available and gives some example on how the vendors enable the actual use of this memory in the operating system (f.e. DAX and filesystems) and then show how an application would make use of this memory. In particular then we will be looking at what considerations are important for the use of RDMA to those memory devices.”