Ceph

So one issue that occurred to me with setting this up is that we have a number of things that really ought to be globals. For instance, right now the SimpleMessenger can take a single Throttler and use that to restrict the flow of incoming and outgoing messages based on config options in g_conf. While it's good to remove the globals, it's entirely possible that clients will have connections to multiple clusters but still want to have a total limit on how much memory is devoted to caching messages. We'll need some way of implementing that!

Good point. Some things probably should be global. However, we have a lot of things that library clients don't want to be global as globals now. That's the problem.

Also, even things that should be global, it's not good to have global constructors that do a lot of work. Global constructor time is scary.