Trading capacity for performance in a disk array∗

Xiang Yu, Benjamin Gum, Yuqun Chen, Randolph Y. Wang, Kai Li, Arvind Krishnamurthy, Thomas E. Anderson

Research output: Contribution to conferencePaperpeer-review

12 Scopus citations


A variety of performance-enhancing techniques, such as striping, mirroring, and rotational data replication, exist in the disk array literature. Given a fixed budget of disks, one must intelligently choose what combination of these techniques to employ. In this paper, we present a way of designing disk arrays that can flexibly and systematically reduce seek and rotational delay in a balanced manner. We give analytical models that can guide an array designer towards optimal configurations by considering both disk and workload characteristics. We have implemented a prototype disk array that incorporates the configuration models. In the process, we have also developed a robust disk head position prediction mechanism without any hardware support. The resulting prototype demonstrates the effectiveness of the configuration models.

Original languageEnglish (US)
StatePublished - 2000
Externally publishedYes
Event4th Symposium on Operating System Design and Implementation, OSDI 2000 - San Diego, United States
Duration: Oct 23 2000Oct 25 2000


Conference4th Symposium on Operating System Design and Implementation, OSDI 2000
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Information Systems
  • Computer Networks and Communications
  • Hardware and Architecture


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