Tuesday, 2/21/12 at 14:00 GMT/15:00 CET/9:00 ESTHigh availability is about more than making sure that apps can get to your data even if there is a failure.How about when you are upgrading your database schema? What if you need to add memory to a database server or reconfigure/restart MySQL? If your apps want to read data from a MySQL slave, how can you be sure they are not reading stale data