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Component Connectors with QoS Guarantees [chapter]

Farhad Arbab, Tom Chothia, Sun Meng, Young-Joo Moon
Lecture Notes in Computer Science  
These can support compositional reasoning about component/service connectors, modelled as Reo circuits with QoS properties.  ...  In this paper we introduce a compositional model of QoS, called Quantitative Constraint Automata, that reflects the underlying architecture of component/service composition represented by the Reo connector  ...  Conclusion In this paper we introduced QCA as an operational model for reasoning about component connectors with QoS guarantees, together with notions of simulation that are preserved by the QCA product  ... 
doi:10.1007/978-3-540-72794-1_16 dblp:conf/coordination/ArbabCMM07 fatcat:sr64o3sa2rbvdgg3ayy2twre6a

Towards Specifying QoS-Enabling Software Architectures [chapter]

Valérie Issarny, Christophe Bidan, Frédéric Leleu, Titos Saridakis
1997 Building QoS into Distributed Systems  
Using the ASTER environment, it can be checked automatically whether a given distributed platform (characterized using connectors) meets the QoS requirements of communicating components with respect to  ...  (e.g. pipe, RPe) between components; 3. configuration that defines a system structure (Le. a software architecture) in terms of the interconnection of components through connectors.  ... 
doi:10.1007/978-0-387-35170-4_41 fatcat:xzayobqp4zdezbffyt543cb7de

Analysis, Design and Simulation of a New System for Internet Multimedia Transmission Guarantee [article]

O. Said, S. Bahgat, M. Ghoniemy, Y. Elawdy
2009 arXiv   pre-print
QoS is a very important issue for multimedia communication systems.  ...  Simulation results show that our proposed system outperforms the old one in terms of QoS parameters like packet loss and delay jitter.  ...  The proposed system components The proposed system comprises three additive components in addition to the old system components. The additive components are 1-Connector. 2-Analyzer. 3-Detector.  ... 
arXiv:0910.0179v1 fatcat:5iadycguhjdybgzjp35ehaldqe

Kalimucho: Contextual Deployment for QoS Management [chapter]

Christine Louberry, Philippe Roose, Marc Dalmau
2011 Lecture Notes in Computer Science  
Kalimucho was tested with the Osagaia/Korrontea component model and several devices; the results confirm that Kalimucho provides a satisfying execution time to adapt applications.  ...  We are particularly interested in distributed applications QoS management facing with hardware limitations and mobility of devices, user requirements and usage constraints.  ...  These models encapsulate each component and connector in a suitable container, which allows to monitor context (activity, QoS, delay, etc.) and to control component/connector life cycle (start, stop, connection  ... 
doi:10.1007/978-3-642-21387-8_4 fatcat:wqveq3vc5nee5lyvy6i2v57lf4

CONNECT Challenges: Towards Emergent Connectors for Eternal Networked Systems

Valérie Issarny, Bernhard Steffen, Bengt Jonsson, Gordon Blair, Paul Grace, Marta Kwiatkowska, Radu Calinescu, Paola Inverardi, Massimo Tivoli, Antonia Bertolino, Antonino Sabetta
2009 2009 14th IEEE International Conference on Engineering of Complex Computer Systems  
CONNECT then investigates formal foundations for connectors together with associated automated support for learning, reasoning about and adapting the interaction behavior of networked systems. I.  ...  It does so by adopting a revolutionary approach to the seamless networking of digital systems, that is, synthesizing on the fly the connectors via which networked systems communicate.  ...  In an assume-guarantee approach [27] , a component is considered in conjunction with the context (for example, another component or the environment) and it is verified under the assumption that the context  ... 
doi:10.1109/iceccs.2009.44 dblp:conf/iceccs/IssarnySJBGKCITBS09 fatcat:narkc5s7oraopbmnwqzd5wq4ie

Model-based dynamic QoS-driven service composition

Antinisca Di Marco, Antonino Sabetta
2010 Proceedings of the 2nd International Workshop on the Quality of Service-Oriented Software Systems - QUASOSS '10  
The paper tackles this challenging scenario by proposing a model-based framework, called Smart, that automatically constructs complex services with guaranteed QoS.  ...  In this case, monitoring is used to characterize empirically (as opposed to "contractually") the QoS offered by such non-guaranteed services.  ...  guaranteed QoS levels.  ... 
doi:10.1145/1858263.1858270 fatcat:sbtif6aomzajpnyoah3mkf7yni

Timing Driven Architectural Adaptation [chapter]

Andrew Wils, Yolande Berbers, Tom Holvoet, Karel De Vlaminck
2006 Lecture Notes in Computer Science  
Adaptation points offer run-time adaptation based on component and component group reconfigurations.  ...  We will elaborate more on the details of these concepts and discuss their implementation and use on Draco, a Java based component platform.  ...  Figure 8 : 8 A twin point with 3 connected components. One component is not yet known. Figure 10 : 10 MusicDale component-connector view.  ... 
doi:10.1007/11773887_19 fatcat:nlos4zevhfchfdppshbl5dl2sy

QoS Contract-Aware Reconfiguration of Component Architectures Using E-Graphs [chapter]

Gabriel Tamura, Rubby Casallas, Anthony Cleve, Laurence Duchien
2012 Lecture Notes in Computer Science  
With this, we aim to develop on the vision of the component-based software engineering (CBSE) as a generator of software artifacts responsible for QoS contracts.  ...  This formalization, together with a denition of a QoS contract, forms the basis of the framework we propose to enable a system to preserve its QoS contracts.  ...  reconguration) the addition or removal of software components and connectors at runtime, as specied by parametrized rules given by a QoS property domain expert or a software QoS architect; (ii) (safe-1  ... 
doi:10.1007/978-3-642-27269-1_3 fatcat:3hxf5vbpszailgr4dsn7v26mpq

Challenges on Coordination for Cyber-Physical Systems

Meng Sun
2013 Applied Mechanics and Materials  
Cyber-physical systems integrate computing and communication with monitoring and control of physical entities.  ...  The complex interaction with the physical world makes coordination models and languages very important for the analysis, design and development of cyber-physical systems.  ...  New models and tools are needed to provide QoS guarantees for the coordination among heterogeneous components that interact in a complex, multi-scale environment.  ... 
doi:10.4028/ fatcat:3t6wnlo4ibbrblgn36pz47xani


Cyril Cassagnes, Philippe Roose, Marc Dalmau
2009 ACM SIGBED Review  
The architecture of such application is based on two component models: Osagaia for software containers and Korrontea for connector containers.  ...  Kalimucho uses service factory permitting the creation of instances of software components.  ...  Capture of QoS events from components/connectors and determine when they imply to reconfigure the application. 4.  ... 
doi:10.1145/1851340.1851354 fatcat:yzzxxijd3fhaboxuegwtqzeocq

SLA-driven dynamic cloud resource management

Andrés García García, Ignacio Blanquer Espert, Vicente Hernández García
2014 Future generations computer systems  
In particular, Cloudcompaas enables Cloud providers with a generic SLA model to deal with higher-level metrics, closer to end-user perception, and with flexible composition of the requirements of multiple  ...  Moreover, Cloudcompaas provides a framework for general Cloud computing applications that could be dynamically adapted to correct the QoS violations by using the elasticity features of Cloud infrastructures  ...  Also, the authors wish to thank the financial support received from The Spanish Ministry of Education and Science to develop the project 'Code-Cloud', with reference TIN2010-17804.  ... 
doi:10.1016/j.future.2013.10.005 fatcat:sj54tlnkibfbxms44qvldc4x4y

Qos architectural patterns for self-architecting software systems

Daniel A. Menasce, João P. Sousa, Sam Malek, Hassan Gomaa
2010 Proceeding of the 7th international conference on Autonomic computing - ICAC '10  
fails, it guarantees the response time of the next fastest component.  ...  The connector merges all replies from the C components and replies to the original request. The connector and all components have to be available for the pattern to be available.  ... 
doi:10.1145/1809049.1809084 dblp:conf/icac/MenasceSMG10 fatcat:bchhftryxbg2rih577vaxczwd4

An adaptation platform for multimedia applications CSC (component, service, connector)

Makhlouf Derdour, Philippe Roose, Marc Dalmau, Nacira Ghoualmi‐Zine
2012 Journal of Systems and Information Technology  
) [1] which provides for new types of graphical interfaces and connectors with a richer semantics.  ...  The CSC platform (Component, Service and Connector) is based on a component/service model that allows adaptation of component-based applications and use service-oriented architecture for providing adaptation  ...  It cooperates with QoS manager at each level of connector adaptation.• The assembly manager ensures the assembly/reassembly of components and connectors.  ... 
doi:10.1108/13287261211221119 fatcat:slwtpwbaw5e47pl4hhkwuqtd3q

Customizing Component-Based Architectures by Contract [chapter]

Orlando Loques, Alexandre Sztajnberg
2004 Lecture Notes in Computer Science  
Besides specifying non-functional (or QoS) requirements, these contracts are used to guide architecture customizations required to enforce the requirements.  ...  This paper presents an approach to describe, deploy and manage component-based applications having dynamic functional and non-functional requirements.  ...  It is worth to point out that some QoS requirements can be directly mapped into connectors, which are equivalent to meta-level components, and can be configured in an application's architecture. d) The  ... 
doi:10.1007/978-3-540-24848-4_2 fatcat:h2v4xk5b6fh4tljfvnmt7pqyjq

A contract-based approach to describe and deploy non-functional adaptations in software architectures

Orlando Loques, Alexandre Sztajnberg, Romulo Curty, Sidney Ansaloni
2004 Journal of the Brazilian Computer Society  
This paper presents a comprehensive approach to describe, deploy and adapt component-based applications having dynamic non-functional requirements.  ...  The infrastructure required to manage the contracts follows an architectural pattern, which can be directly mapped to specific components included in a supporting reflective middleware.  ...  (ii) When a property profile requirement can be implemented by a specific connector, it just interact with this connector that also acts like a QoS agent; for example, this happens in the case presented  ... 
doi:10.1007/bf03192350 fatcat:s55i3kscyzhjpmzzkvj7tyrecq
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