[barrkel]

I honestly like the way Rails does it: both capturing the imperative deltas and dumping the final schema which gets checked in. Not a big fan of down migrations, usually a waste of time.

Otherwise I like Percona's OSC, particularly how it can tune down table rewrites when there's competing work, or replication is lagging too much. We're just at the point where we need to automate the OSC tool rather than using it as a point solution for migrating our bigger tenants.