Open-source software (software-defined storage) storage platform. Ceph is a single distributed computer cluster that provides 3-in-1 interfaces for object-, block- and file-level storage. Ceph aims primarily for completely distributed operation without a single point of failure, scalable to the exabyte level, and freely available. Since version 12 Ceph does not rely on other filesystems and can directly manage HDDs and SSDs with its own storage backend BlueStore and can completely self reliantly expose a POSIX filesystem.

Proxmox Video: https://www.youtube.com/watch?v=08b9DDJ_yf4&t=150s&ab_channel=CraftComputing