When I worked there (mid 2009 to early 2014), almost all customers had dedicated installations (as in a rack of servers) with just their data on-site. Even the

When I worked there (mid 2009 to early 2014), almost all customers had dedicated installations (as in a rack of servers) with just their data on-site. Even the hosted instances had siloed data. There are features for peering, but AFAIK that has to be explicitly set up between installations.