Ceph is open-source software that stores your data across many ordinary servers, keeping copies so the data survives if a server fails. It provides block, file and object storage from one cluster.
These posts cover running it day to day: building clusters, OSDs and monitors, pools and CRUSH rules, and the RBD, CephFS and object storage interfaces.
I counted every commit to Ceph’s main branch for the last ten years — 69,613 of them from 1,718 people across 478 organisations — traced all 38 Steering Committee members to their employers, and gathered the publicly stated deployments. The result is a project that absorbed the loss of its founder and its second-largest contributor without dropping a beat, and is still shipping at the same rate today.