The biggest cause of data loss and outages with a Ceph cluster are normally human error, whether it be by accidentally 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 more detail in the next chapter.