As mentioned throughout this book, Ceph is a very resilient distributed storage system that pairs well with Proxmox to store virtual disk images. There are a few key factors that make Ceph cluster a good choice for production-level virtual environment.
When it comes to Ceph node and cluster, we can forget about hardware-based RAID. Instead, we have to think multi-node or clustered RAID. That is because of the distributed nature of Ceph and how data is dispersed in all the drives in the cluster regardless in which node the drive is. With Ceph, we no longer need to worry about a device failure in a particular node. Ceph performs best when it is given access to each drive directly without any RAID in the middle. If we are to place drives in RAID per node, we will actually hurt Ceph immensely and take away everything that makes Ceph great. We can, however, still use the RAID interface card to implement JBOD configuration or to be able to connect...
