What we'll be doing
During the service interruption, we'll be performing two failovers from the primary location to a secondary server in New York for the SQL Servers that support the Stack Exchange Network, jobs, and chat. We're doing multiple failovers to get some detailed information of failover performance for Microsoft.
We expect that the site will be in a read-only state for less than 15 minutes in total. Once we've done the failover, and everything seems to be up and running, we'll take the sites out of read-only.