We’re having another maintenance window tonight from (00 to 23:00 PDT”:http://www.timeanddate.com/worldclock/fixedtime.html?month=10&day=15&year=2009&hour=22&min=0&sec=0&p1=224). We will be installing and testing the “sorry server” that will be enabled if no frontends are available to serve requests. Instead of just refusing connections, this server will point you to the Twitter status feed and display information on surviving when GitHub is down. In order to test that everything is working properly we will need to deliberately remove all the frontends from the load balancer for a small period. Git and SSH access to repositories will be unaffected during this period.