Remember that cells is not only about homogenous compute scalability, it is also a method of federation, and there is no guarantee any particular child cell has the same capabilities or high-level architecture as any others.
It's VERY IMPORTANT for existing deployments that things like flavor extra-specs are set or can be overridden in the child compute cells. This is of particular relevance to things like resource quotas which may be set differently based on the hardware architecture in the cell.
Please please please be careful here!
Remember that cells is not only about homogenous compute scalability, it is also a method of federation, and there is no guarantee any particular child cell has the same capabilities or high-level architecture as any others.
It's VERY IMPORTANT for existing deployments that things like flavor extra-specs are set or can be overridden in the child compute cells. This is of particular relevance to things like resource quotas which may be set differently based on the hardware architecture in the cell.