Isolation points: Creating performance-robust enterprise systems

  • Authors:

  • Mohamed S. Mansour;Karsten Schwan;Sameh Abdelaziz

  • Affiliations:

  • Georgia Institute of Technology;Georgia Institute of Technology;Worldspan, L.P.

  • Venue:
  • ACM Transactions on Autonomous and Adaptive Systems (TAAS)
  • Year:
  • 2009

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Abstract

This article explores a performance isolation-based approach to creating robust distributed applications. For each application, the approach is to understand the performance dependencies that pervade it and then impose constraints on the possible ‘spread’ of such dependencies through the application. The mechanisms used for this purpose, termed isolation points, are software abstractions inserted at key program locations: (1) in application interfaces, (2) in middleware implementations for making remote requests, and (3) in the system interfaces used by middleware and applications. This article demonstrates the utility of isolation points by using them to implement higher level abstractions that improve the performance-robustness of representative enterprise applications. The I-Queue abstraction uses isolation points to implement performance-robust messaging, targeting the message queues used in distributed enterprise codes. By appropriately orchestrating message dispatching, I-Queue can achieve an improvement of 16--32% in dispatched message locality based on traces obtained from the large-scale e-Pricing® search engine operated by Worldspan L.P.