In the MCP 2019.2.16 maintenance update, Mirantis introduces the following enhancements for OpenStack:

To obtain the enhancements, follow the steps described in Apply maintenance updates.

Host passthrough for VCP

Added the capability to enable the host-passthrough CPU mode to enhance the performance of the MCP Virtualized Control Plane (VCP).

Cinder coordination

Implemented the capability to enable Cinder coordination with MySQL as a back end to avoid Cinder race conditions in case of an active/active configuration.

Disabling of Nova cell mapping

Implemented the capability to disable Nova cell mapping and database migrations, for example, to faster redeploy the nova state. However, Nova cell mapping must be enabled prior to performing an upgrade.