Coupling Right-Provisioned Cold Storage Data Centers with Deduplication
Liangfeng Cheng, Yuchong Hu, Zhaokang Ke, Zhongjie Wu · 2021
Modern cloud-scale cold storage data centers have begun to support right-provisioning of a rack’s resources (power, cooling, etc.), which allows only a small fraction of all hard disks to be active (spinning) concurrently at any given time to reduce the cost of ownership. Data deduplication is a traditional approach to split files into chunks and eliminate duplicate chunks, which can also cut costs for cold storage systems. However, when combined with right-provisioning, classical deduplication may make a file deduplicated and stored across the disks some of which are not active currently, thus leading to unacceptable access performance caused by spinning up and down of the disks.