NDLI: Designing multi-layers self-adaptive complex applications

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Designing multi-layers self-adaptive complex applications

Content Provider	ACM Digital Library
Author	Lorenzoli, Davide Micillo, Rosa Anna Tosi, Davide Venticinque, Salvatore
Abstract	The impossibility of statically determining the behavior of complex systems that interact at runtime with heterogeneous devices and remote entities, may lead to unexpected system failures and performance degradation. Recently, self-adaptive applications have been recognized as viable solutions for dealing with systems where size and complexity increase beyond the ability of humans. However, self-adaptive solutions have been always studied in isolation, only involving single layers of the system (e.g. operative system, middleware, firmware, hardware). In this paper we discuss our novel idea of multi-layers deep adaptability of complex systems. We present an integrated approach for designing and coordinating applications with three-layers of self-adaptation. The solution proposed is based on specialized sense-plan-act control loops that interact each others to monitor both specific parts and also the global behavior of the system. These control loops sense unexpected behaviors that can compromise the system, then diagnose the system layer that needs an adaptation action, and finally act the proper adaptation strategy to overcome the revealed problems without user intervention. We validate the approach with a SOA-based application, the Virtual Tour Guide, designed with three-layers self-adaptive abilities in order to overcome functional/non-functional problems that can derive from the integration of heterogeneous and remote third-party services.
Starting Page	70
Ending Page	77
Page Count	8
File Format	PDF
ISBN	9781595937247
DOI	10.1145/1295074.1295088
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2007-09-03
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Mobile devices Distributed systems Context awareness Self-adaptive systems Service-oriented applications
Content Type	Text
Resource Type	Article

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