State of CephFS: Three Easy Pieces

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" summary

CephFS status report focuses on concrete improvements: MDS journal minor segment support reduces subtree-map churn and speeds trimming; a manager plugin implements qus crash-consistent snapshots that recall caps across clients for coordinated snap creation; upcoming Tentacle adds referent inode handling to remove the global snap realm and enable efficient hardlink and future fast-clone semantics; kernel and user-space fscrypt are cross-compatible; user-space async I/O boosts NFS Ganesha throughput; volumes plugin gains per-plugin queues to reduce operation backlog.

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" chapters (14)

1. 0:00Introduction and overview
2. 1:26CephFS architecture and components
3. 3:15History and evolution of CephFS
4. 7:12Key features in Squid release
5. 13:18MDS journaling and performance improvements
6. 16:53Crash consistent snapshots with QUs
7. 20:06Case insensitive directory trees
8. 21:51Efficient hardlink handling
9. 25:21FS script and encryption support
10. 27:56Asynchronous I/O in user space client
11. 29:02Ceph Manager plugins and scalability
12. 31:34Subvolume layout and future plans
13. 33:02Fast cloning and QoS roadmap
14. 34:49Q&A session