Unleashing The Potential of Datacenter SSDs by Taming Performance Variability

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" summary

Sandook is a rack-scale block storage system with a logically centralized controller plus lightweight clients and SSD agents that implements log-structured placement for writes, replica-aware read routing, read-write segregation, and TCP-like storage congestion control without special hardware. It claims to recover lost SSD capacity, unlocking ~95% of ideal throughput and delivering 30–82% higher raw I/O, 1.7× storage and 1.9× application throughput, 88% lower latency, and 12–94% end-to-end improvement across benchmarks in the paper.

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" chapters (15)

1. 0:00SSD performance variability
2. 1:03SSD cost and data center use
3. 2:07Measured performance gap in arrays
4. 3:32Sources of SSD variability
5. 4:55Read-write interference impact
6. 5:56Garbage collection and tail latency
7. 6:59Limitations of SSD routing
8. 8:05Sindook’s routing design
9. 9:28Time scale separation in SSD
10. 10:28Sindook architecture overview
11. 11:53Load steering policy
12. 12:14Read-write segregation
13. 15:19Performance improvements with Sindook
14. 16:22Conclusion and open-source
15. 17:03Q&A