The Tail at Store: A Revelation from Millions of Hours of Disk and SSD Deployments

We study storage performance in over 450,000 disks and 4,000 SSDs over 87 days for an overall total of 857 million (disk) and 7 million (SSD) drive hours. We find that storage performance instability is not uncommon: 0.2% of the time, a disk is more than 2x slower than its peer drives in the same RAID group (and 0.6% for SSD). As a consequence, disk and SSD-based RAIDs ex

• Type: Journal
• Year: 2016
• Where: FAST
• Authors: Mingzhe Hao, Gokul Soundararajan, Deepak R. Kenchammana-Hosekote, Andrew A. Chien, Haryadi S. Gunawi
• Keywords: FAST 2016, Operating System