An Energy Efficient Shifted Logging Storage Architecture for Write-oriented Workloads

In this paper, we propose SiLo, a novel energy efficient shifted logging storage architecture, for write-oriented workloads. By organizing free storage space of redundant mirrored disks in a RAID10 system into a logical logging space pool and shifting logger among different mirrored disk pairs, only one or few mirrored disk pairs are used as the on-duty logger at a time and all the other off-duty mirrored disk pairs are set to low-power state for power saving. SiLo is extremely effective for the write-oriented workloads. Extensive trace-driven evaluations demonstrate the power saving potentiality and performance scalability. Thorough analysis and comparison of reliability between SiLo and typical RAID10 demonstrates that the MTTDL of SiLo is much larger than that of typical RAID10..