Check out the new USENIX Web site.
USENIX, The Advanced Computing Systems Association

5th USENIX Conference on File and Storage Technologies Abstract

Pp. 4760 of the Proceedings

Proportional-Share Scheduling for Distributed Storage Systems

Yin Wang, University of Michigan; Arif Merchant HP Laboratories

Abstract

Fully distributed storage systems have gained popularity in the past few years because of their ability to use cheap commodity hardware and their high scalability. While there are a number of algorithms for providing differentiated quality of service to clients of a centralized storage system, the problem has not been solved for distributed storage systems. Providing performance guarantees in distributed storage systems is more complex because clients may have different data layouts and access their data through different coordinators (access nodes), yet the performance guarantees required are global.

This paper presents a distributed scheduling framework. It is an adaptation of fair queuing algorithms for distributed servers. Specifically, upon scheduling each request, it enforces an extra delay (possibly zero) that corresponds to the amount of service the client gets on other servers. Different performance goals, e.g., per storage node proportional sharing, total service proportional sharing or mixed, can be met by different delay functions. The delay functions can be calculated at coordinators locally so excess communication is avoided. The analysis and experimental results show that the framework can enforce performance goals under different data layouts and workloads.

  • View the full text of this paper in HTML and PDF. Listen to the presentation in MP3 format.
    Click here if you have forgotten your password Until February 2008, you will need your USENIX membership identification in order to access the full papers. The Proceedings are published as a collective work, 2007 by the USENIX Association. All Rights Reserved. Rights to individual papers remain with the author or the author's employer. Permission is granted for the noncommercial reproduction of the complete work for educational or research purposes. USENIX acknowledges all trademarks within this paper.
To become a USENIX member, please see our Membership Information.

Last changed: 4 May 2007 ac