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Software Engineering Concerns in Observing Autonomic Systems Networks Prof. A. Taleb-Bendiab School of Computing Liverpool John Moores University email: a.talebbendiab@livjm.ac.uk http://www.cms.livjm.ac.uk/taleb/research. Outline.

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Outline

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  1. Software Engineering Concerns in Observing Autonomic SystemsNetworks Prof. A. Taleb-BendiabSchool of ComputingLiverpool John Moores Universityemail: a.talebbendiab@livjm.ac.ukhttp://www.cms.livjm.ac.uk/taleb/research Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 1

  2. Outline • Much is known about model-based autonomic systems design based on: • Feedback control loop, Sensor&Effector, Policy-based management • Centralised and design-time control and monitoring strategies for autonomic systems, Etc. • SE techniques exist to handle exhaustive monitoring of a system (e.g. event driven programming, OO design patterns, such as • observer/listener registration), Design by contract, etc. • Engineering Networks of Autonomic Systems • Are small scale AC systems design models Scalable? • Are they applicable to large networks of AC systems • If the exhaustive monitoring of a random network of AC is computationally expensive then • what is the minimal feedback/observation vertices set to enable the monitoring of the whole Networks • Our approach • Algorithm and associated metrics and SE support partial observation of random networks of AC • Experiment and case-study • Conclusions, further works and Q&A Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 2

  3. Large-Scale P2P Self-Organising Overlays Service Provider Readings Monitoring & Sensor & Actuator Overlay Network Show Example-4 Consumer Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 3

  4. Exploiting Topological Self-Organisation • In a Scale-Free Network we can monitor “only” high degree nodes (highly connected) • Efficient monitoring of nodes is possible without topological knowledge • 17-23% reduction of the number of nodes to be monitored [EASE’07] • Approach • Random Acquaintance Monitoring method • Characterise the network via SF signatures including • Hub Connection Density metric • Acquaintance Nomination metric • Calculate the acquaintance nomination graph • Adapted acquaintance immunisation algorithm [R Cohen et al. 2002] • Selection nominated nodes (often hubs) • Establish observer graph (overlay) • Deploy typed observer agents. Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 4

  5. So Far … Simulation framework Network Characterisation Such as acquaintance monitoring algorithm, metrics, etc. Meta-language for network governance and observation A method of externalising observation and deployment logic for ease of self-adaptation and evolution Software design patterns for observer agent generation and deployment Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 5

  6. Case-Studies: P2P Network Simulation Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 6

  7. Case-Studies: Salt World Testbed Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 7

  8. Conclusions • We argued that AC design model can be used to design large-scale networks of AC systems • When we used Random Acquaintance Monitoring method • As monitoring/feedback of scale-free autonomic networks can be improved by reducing the number of monitored nodes • with near complete network knowledge • Further work is required • To evaluate the method in other case-studies including • The impact of heterogeneity of monitored AC nodes • reasoning issues. • Extension of the method to other network types including random, regular, etc. • Enhance the software framework. Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 8

  9. That’s the end – so I’m off ! Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 9

  10. Acknowledgements • Acknowledgements • My thanks to the Team •  • Useful Links • www.cms.livjm.ac.uk/2nrich • www.cms.livjm.ac.uk/cloud • www.cms.livjm.ac.uk/taleb Prof. A. Taleb-Bendiab, Talk: SOAS’07, Contact: www.livjm.ac.uk/taleb/research, Date: 26/07/2014, Slide: 10

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