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Thursday, May 14 • 9:40am - 10:10am
Enabling Full Stack QoS with IO Priority

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The HDD IO priority has been explored on Facebook storage server Bryce Canyon. The feature can help enable QoS at IO level and provide a methodology to better manage latency for our workload. However, the full stack implementation requires standardization efforts of creating innovative communication channel between the host and device on defining target metrics and policies. The communication syntax needs to be consistent across vendors, capacity and SAS SATA protocols. In this talk, we would like to present potential latency management benefits based on the preliminary experiments that has been done on our Bryce Canyon platform. We will also discuss about some certain challenges we are facing such as number of priority levels, SAS & SATA difference and tail latency management etc. Those challenges cannot be easily resolved without the collaboration across the industry.

avatar for Yong Jiang

Yong Jiang

Storage Engineer, Facebook

Abhinav Sharma

Software Engineer, Facebook

Thursday May 14, 2020 9:40am - 10:10am
EW: Storage Solutions