[nova][ptg] Summary: Next Steps for QoS Bandwidth

Eric Fried openstack at fried.cc
Fri May 3 04:22:21 UTC 2019

- Live migration support: https://review.opendev.org/#/c/652608
- Grab bag for other stuff:
- Request group to resource provider mapping (needs to be moved to a
placement spec): https://review.opendev.org/#/c/597601/

- No microversion for adding migration operation support (or at least
propose it that way in the spec and let discussion ensue there)
- Can the live migration support depend on the existence of multiple
portbinding or we have to support the old codepath as well when the port
binding is created by the nova-compute on the destination host?
  => Yes, this extension cannot be turned off
- Pull the trigger on rg-to-rp mappings in placement. This is also
needed by other efforts (cyborg and VGPU at least).
- Tag PFs in the PciDeviceSpec, and tag the corresponding RP indicating
that it can do that. Require the trait - refuse to land on a host that
can't do this, because the assignment will fail late.
- Default group_policy=none and do the post-filtering on the nova side

More discussion related to this topic may occur in the nova/neutron
cross-project session, scheduled for Friday at 1400 in the Nova room:


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