Ceph on Arm64/Ampere: IOPs/Watt Demystified

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Comparison of Ampere Altra versus Ampere M1 (MR1) on Ceph shows the MR1 packs more cores per box and delivers higher throughput and efficiency: 400k IOPS at 1430 W, versus the older Altra result of 200k IOPS at 900 W (different node counts). Testbed is Ubuntu 24.04, containerized Ceph, 100 Gb network, three-node MR1 cluster with 3 nodes, 192 cores, 8 SSDs/node, 24 OSDs and 6,000 PGs. Results show 285 IOPS/W for MR1 vs 223 IOPS/W for Altra, linear scaling to 8 OSDs with no bottleneck and reads improving ~1.8x vs writes ~2x.

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" chapters (9)

1. 0:00Introduction and context
2. 1:04IOPS per watt metric explained
3. 3:36Ampere’s focus and hardware
4. 5:01Benchmark setup details
5. 6:50Performance results comparison
6. 9:50Power consumption findings
7. 11:41Efficiency analysis
8. 13:09Benchmark fairness discussion
9. 14:36Q&A on low-power coding