Open Stack

Hi All,

We're about to expand our OpenStack Cloud to a second datacenter.
Anyone one have opinions they'd like to share as to what I would and
should be worrying about or how to structure this?  Should I be
thinking cells or regions (or maybe both)?  Any obvious or not so
obvious pitfalls I should try to avoid?

Current scale is about 75 hypervisors.  Running juno on Ubuntu 14.04
using Ceph for volume storage, ephemeral block devices, and image
storage (as well as object store).  Bulk data storage for most (but by
no means all) of our workloads is at the current location (not that
that matters I suppose).

Second location is about 150km away and we'll have 10G (at least)
between sites. The expansion will be approximately the same size as
the existing cloud maybe slightly larger and given site capacities the
new location is also more likely to be where any future grown goes.

Thanks,
-Jon