I´m running one master with two slaves, using 18.104.22.168 (debian 5 on master and debian 6 on slaves) - planing on upgrading to 22.214.171.124
This thing of the master first is new to me - i have always done the opposite, but I´ll give it a try. Upgrading a master-slave cluster is quite a nervous project.
But what I wonder - do I have to update the database during the upgrade? There´s a lot that can mess upp on upgrading the database so I´d rather not.