The debugging story was interesting, but what really sticks out for me is that Amazon has pretty tight QoS working for distributed storage. That's actually a r

The debugging story was interesting, but what really sticks out for me is that Amazon has pretty tight QoS working for distributed storage. That's actually a really hard problem - much harder than its better known networking equivalent. As much as I might curse the Amazon business folks for using it to screw customers, I also have to give kudos to the engineers for implementing it.