Doing QoS Before Ceph Cluster QoS Is Available
summary
Describes enforcing Quality of Service for Ceph by shaping I/O at the host and network edge before Ceph offers native QoS. Uses Linux tc qdisc, blkio cgroups and a small proxy shim that maps Ceph client IDs to per-client limits; deployed on a 10-node SUSE Ceph test cluster, this reduced 95th‑percentile latency from ~200 ms to ~80 ms while preserving aggregate throughput and the shim is running in production.
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chapters (4)
- 0:00Introduction to QoS
- 17:31QoS challenges before Ceph
- 25:36Practical QoS approaches
- 33:56Summary and Q&A
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