Open Stack

> I think for those reasons CERN is running without a superconductor
> mode and can hit the API DB from the cells. Devstack superconductor
> mode is the ideal though for the separation of concerns Dan pointed
> out.

I'm not sure that CERN does run without a superconductor, but
maybe. However, cells having API DB creds is a different issue -- you
can give them those creds and still have a superconductor.

Without a superconductor, you'd have to choose one of your cells to
receive the burden of cross-cell work (like instance boots, resizes, and
anything we currently don't target to a cell. If you have one big "main"
cell, and a bunch of smaller ones, that could make sense as you have
extra capacity in the big one. From an organization point of view, and
from the deployment tool's perspective, that makes it a little more
lopsided than ideal. However, again, if the overhead of running those
services is too great, then it makes sense.

--Dan