We are migrating mysql1.ibiblio (aka mysql1.int.ibiblio, aka db1) to new hardware this morning starting at 9:30a local (Eastern time). This will be the most disruptive of our database migrations. Any applications in your collections that depend on mysql1 may show a database error or otherwise have degraded functionality during the maintenance. We expect to be done before 11:45a local. If your site or application in your collection that depends on mysql1 is still having trouble after noon eastern today, the 16th of June, please reply below and we’ll look into it.
EDIT to add: we have spot-checked various collections that have databases on mysql1, and we believe mysql1 is working as expected. If your site using a database on mysql1 is still having trouble, please let us know by replying here.