Trevi: watering down storage hotspots with cool fountain codes

  • Authors:
  • George Parisis;Toby Moncaster;Anil Madhavapeddy;Jon Crowcroft

  • Affiliations:
  • University of Sussex and University of Cambridge;University of Cambridge;University of Cambridge;University of Cambridge

  • Venue:
  • Proceedings of the Twelfth ACM Workshop on Hot Topics in Networks
  • Year:
  • 2013

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Abstract

Datacenter networking has brought high-performance storage systems' research to the foreground once again. Many modern storage systems are built with commodity hardware and TCP/IP networking to save costs. In this paper, we highlight a group of problems that are present in such storage systems and which are all related to the use of TCP. As an alternative, we explore Trevi: a fountain coding-based approach for distributing I/O requests that overcomes these problems while still efficiently scheduling resources across both networking and storage layers. We also discuss how receiver-driven flow and congestion control, in combination with fountain coding, can guide the design of Trevi and provide a viable alternative to TCP for datacenter storage.