hesela.devMittOS
MittOS is a research operating-system design that uses predicted resource delays to reject reads and let applications retry another replica.
The rejection signal is EBUSY, not a media-error diagnosis. MittCFQ can revoke previously admitted reads when higher-priority arrivals consume their slack. The studied three-replica application's final attempt disables its deadline. [1]
The published SSD implementation requires an open-channel SSD and a modified kernel. Its LightNVM layer uses preprofiled NAND timings; this is not an ordinary NVMe configuration option. [2]
Relations
- related
- LinnOS, Hedged request, Open-channel SSD, Tail latency
Limitations
- Prediction does not cover every software delay, and device performance profiles can drift. [1]
Citations
- Hao et al. MittOS: Supporting Millisecond Tail Tolerance with Fast Rejecting SLO-Aware OS Interface. SOSP 2017, sections 3-5, 7.8.1 and 8.1.
- MittSSD author repository: hardware requirement and modified storage stack, pinned revision f987801.
Sources & caveats
- Hao, Li, Tong, Pakha, Suminto, Stuardo, Chien and Gunawi, SOSP 2017. DOI 10.1145/3132747.3132774 verified on the manuscript's first page.
- Full paper acquired from its university course mirror; sections 3-5, 7 and 8 reviewed. No MittOS execution or hardware replication performed.
- Implementation requirements checked against README.md at f987801270e84ff69bac9434b8ff4c0ae8d142c8; no claim that this revision is identical to the paper's evaluated system.