When I was fresh with Gluster, I was blindly following tutorials for how to fix a split-brain. Backstory: I inherited this, so I had to fix it as quickly as possible.

Basically, you can mount individual bricks in /tmp and run a 'forcefully fix this split brain.'

I left this running to let things get happy overnight in a screen. The following morning every single file was gone.

I had left a tmpwatch on /tmp to remove all files in /tmp after a certain point in time. We had a backup, but it was a few days old. That was a fun weekend.

It is the worst feeling in the world, and one that I'll never make again... at least like that.