In this chapter, you'll learn about BlueStore, the new object store in Ceph designed to replace the existing filestore. Its increased performance and enhanced feature set are designed to allow Ceph to continue to grow and provide a resilient high-performance distributed storage system for the future. Since the Luminous release, BlueStore is now the recommended and default object store that's used when creating new OSDs. This chapter will cover how BlueStore works and why it is much better suited than Filestore for Ceph's requirements. Then by following a step by step tutorial you will be guided through how to upgrade a Ceph cluster to BlueStore.

In this chapter, you'll learn the following topics:

• What is BlueStore?
• The limitations of filestore
• What problems BlueStore overcome
• The components of BlueStore and how it works
• Introduction to ceph-volume
• How to deploy BlueStore OSDs
• Approaches to upgrading live clusters from filestore to BlueStore