In this chapter, we have covered the theory behind Ceph's RADOS tiering functionality and looked at the configuration and tuning operations available to make it work best for your workload. It should not be forgotten that the most important aspect is to understand your workload and be confident that its I/O pattern and distribution is cache-friendly. By following the examples in this chapter, you should also now understand the required steps to implement tiered pools and how to apply the configuration options.
In the next chapter, we will see what problems occur in maintaining a healthy Ceph cluster and how can we handle them.
