Throughout the week of April 25-30 we will be performing the first phase of hypervisor maintenace on the "Cloud 1" infrastructure (servers with IP addresses in the 66.180.164.* range). We will be rebooting hypervisors after 9PM CDT, however all client servers that are hot migratable will be migrated prior to the reboots. Most client servers in this cloud are hot migratable so we do not expect downtime for most clients. If a client server cannot be hot migrated, the expected downtime is 3-5 minutes. The maintenance windows are intended to run from 9PM-12:01AM.