Past, present and future of the storage in the CERN private cloud

on YouTube ↗37m

" summary

CERN runs a private cloud since 2013 with ~9,000 servers and 48 Nova cells backed by multiple Ceph clusters (about eight), migrated from mixed NetApp/Hyper‑V to KVM + Ceph; teams add availability zones on a live system without downtime, write an offload deletion patch to avoid single‑thread delete DoS, and deploy an S3 RadosGW with a key sync script to avoid Keystone latency. Manila scale causes 30‑minute share startup times and Windows boot‑from‑volume shows misaligned IO; team size is ~8–10 for cloud and ~5 for Ceph ops.

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" chapters (8)

1. 0:00Introduction to CERN cloud
2. 1:06CERN's research environment
3. 2:26Cloud service architecture
4. 5:31Storage evolution and hurdles
5. 14:04Scaling and reliability issues
6. 20:45Practical storage lessons
7. 22:41Current challenges and needs
8. 25:07Future plans and Q&A