Ceph Practice And Usage In China Mobile
summary
Ceph is in production since 2016 with hundreds of petabytes across block and object; block clusters exceed ~500 PB and single clusters run ~2,600 OSDs. Architecture uses Ceph as OpenStack backend (Cinder/Glance), S3/Swift compatibility, multi‑site replication and erasure coding plus replica pools. Operational work includes 200+ upstream patches, a management platform, three hardware profiles (capacity/balanced/performance) using SSD journals and SSD caching (flashcache/bcache) and notes metadata‑sync scaling limits.
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