On Mon, Jun 04, 2018 at 02:58:49PM -0700, Roland Dreier wrote: > We plan to implement all the fancy NVMe standards like ANA, but it > seems that there is still a requirement to let the host side choose > policies about how to use paths (round-robin vs least queue depth for > example). Even in the modern SCSI world with VPD pages and ALUA, > there are still knobs that are needed. Maybe NVMe will be different > and we can find defaults that work in all cases but I have to admit > I'm skeptical...
The sensible thing to do in nvme is to use different paths for different queues. That is e.g. in the RDMA case use the HCA closer to a given CPU by default. We might allow to override this for cases where the is a good reason, but what I really don't want is configurability for configurabilities sake.
