We did have two problems with locking due to the nature of Galera, but ownCloud was always quick to correct those bugs when they popped up. It’s something that’s difficult to test for, until you’re under production level loads. We didn’t always catch these issues in our development environment.

We only had two outages of approximately 30 minutes each due to these bugs over the course of three years with near 24/7 uptime. This is pretty good.