The TickerTAIP parallel RAID architecture

  • Authors:
  • Pei Cao;Swee Boon Lim;Shivakumar Venkataraman;John Wilkes

  • Affiliations:
  • -;-;-;-

  • Venue:
  • ISCA '93 Proceedings of the 20th annual international symposium on computer architecture
  • Year:
  • 1993

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Abstract

Traditional disk arrays have a centralized architecture, with a single controller through which all requests flow. Such a controller is a single point of failure, and its performance limits the maximum size that the array can grow to. We describe here TickerTAIP, a parallel architecture for disk arrays that distributed the controller functions across several loosely-coupled processors. The result is better scalability, fault tolerance, and flexibility.This paper presents the TickerTAIP architecture and an evaluation of its behavior. We demonstrate the feasibility by an existence proof; describe a family of distributed algorithms for calculating RAID parity; discuss techniques for establishing request atomicity, sequencing and recovery; and evaluate the performance of the TickerTAIP design in both absolute terms and by comparison to a centralized RAID implementation. We conclude that the TickerTAIP architectural approach is feasible, useful, and effective.