I/O workloads in data centers show significant diurnal variation, with peak and trough periods. Sierra powers down storage servers during the troughs. The challenge is to ensure that data is available for reads and writes at all times, including power-down periods. Consistency and fault-tolerance of the data, as well as good performance, must also be maintained.
- Eno Thereska, Austin Donnelly, and Dushyanth Narayanan, Sierra: Practical Power-proportionality for Data Center Storage, Proceedings of EuroSys 2011, Salzburg, Austria, April 2011
- Eno Thereska, Austin Donnelly, and Dushyanth Narayanan, Sierra: a power-proportional, distributed storage system, no. MSR-TR-2009-153, November 2009