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Comparing redundancy models for high availability middleware

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Abstract

Highly available systems are fault tolerant systems with no single point of failure. Thus the failure of a system component does not imply the outage of the service (i.e. the functionality) provided by the component. This is achieved by deploying redundant components that resume the service provisioning in case of failure. These redundant components may collaborate in assuring the availability of their service according to different redundancy models. In this paper we analyze these redundancy models under different assumptions, and compare their effectiveness with respect to availability in the context of a standardized middleware for service high availability and under some specific setups to derive configuration guidelines.

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Notes

  1. SAForum is a consortium of telecom and computing companies.

  2. The node refers to the server where the component is executed.

  3. A switchover is a more graceful way of failing over.

  4. In the DSPN description, we use the terms ‘place’ and ‘state’ interchangeably, though the technical term is ‘place’, sometimes the term ‘state’ conveys better the meaning.

  5. Note that the CPU consumption may differ depending on the streaming protocol, VLC offers the use of many protocols (HTTP, UDP, RTSP, etc.).

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Acknowledgments

This work is partially supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) and Ericsson Research.

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Authors and Affiliations

  1. Ericsson Canada Inc., Montreal, Quebec, Canada

    Ali Kanso & Maria Toeroe

  2. Electrical and Computer Engineering Department, Concordia University, Montreal, Quebec, Canada

    Ferhat Khendek

Authors
  1. Ali Kanso
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  2. Maria Toeroe
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  3. Ferhat Khendek
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Correspondence to Ali Kanso.

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Kanso, A., Toeroe, M. & Khendek, F. Comparing redundancy models for high availability middleware. Computing 96, 975–993 (2014). https://doi.org/10.1007/s00607-013-0361-x

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