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(to be completed)

 


ThinkMind // International Journal On Advances in Intelligent Systems, volume 1, number 1, 2008 // View article intsys_v1_n1_2008_5


Modelling Reinforcement Learning in Policy-driven Autonomic Management

Authors:
Raphael M. Bahati
Michael A. Bauer

Keywords: Autonomic Management, Reinforcement Learning, Policy-driven Management, QoS Provisioning.

Abstract:
Management of today’s systems is becoming increasingly complex due to the heterogeneous nature of the infrastructure under which they operate and what the users of these systems expect. Our interest is in the development of mechanisms for automating the management of such systems to enable efficient operation of systems and the utilization of services. Central to autonomic management is the need for systems to monitor, evaluate, and adapt their own behavior to meet the different, and at times seemingly competing, objectives. Policy-driven management offers significant benefit to this effect since the use of policies can make it more straightforward to define and modify systems behavior at run-time, through policy manipulation, rather than through re-engineering. This work examines the effectiveness of Reinforcement Learning methodologies in determining how to best use a set of active (enabled) policies to meet different performance objectives. We believe that Reinforcement Learning offers significant potential benefits, particularly in the ability to modify existing policies, learn new policies, or even ignore some policies when past experience shows it is prudent to do so. Our work is presented in the context of an adaptive policy-driven autonomic management system. The learning approach is based on the analysis of past experience of the system in the use of policies to dynamically adapt the choice of policy actions for adjusting applications and system tuning parameters in response to policy violations. We illustrate the impact of the adaptation strategies on the behavior of a multi-tiered Web server consisting of Linux, Apache, PHP, and MySQL.

Pages: 54 to 79

Copyright: Copyright (c) to authors, 2008. Used with permission.

Publication date: February 24, 2009

Published in: journal

ISSN: 1942-2679

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