We've got about 5 hosts running the various Shinken daemons to monitor our environment. We're running 2.0.3 at the moment and are planning an upgrade to 2.2. Question is: can 2.0.3 daemons talk to 2.2 daemons and/or vice versa? It would be very nice if we can upgrade host by host. That would give us almost no downtime. If I have to downtime the entire environment to upgrade everything in 1 go, that will take me half an hour to an hour. Any suggestions? Thanks!