The biggest cause of data loss and outages with a Ceph cluster is normally human error, whether it be by accidently running the wrong command or changing configuration options, which may have unintended consequences. These incidents will likely become more common as the number of people in the team administering Ceph grows. A good way of reducing the risk of human error causing service interruptions or data loss is to implement some form of change control. This is covered in the next chapter in more detail.