the hosting provider we use for Cirrus told us they were going to retire the old generation servers on which Cirrus had been running. i have migrated Cirrus to their "next generation" servers, and adjusted the cluster size for the current demand.
please post here if you have any problems with the new deployment. it looks like everything is working OK right now.
the DNS will be updated in the next few days (i want to let the new servers bake a little before deleting the old ones); the old servers are currently just redirecting to the new ones.