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Software architecture definition for on-demand cloud provisioning

Clovis Chapman, Wolfgang Emmerich, Fermín Galán Márquez, Stuart Clayman, Alex Galis
2011 Cluster Computing  
Cloud computing is a promising paradigm for the provisioning of IT services. Cloud computing infrastructures, such as those offered by the RESERVOIR project, aim to facilitate the deployment, management and execution of services across multiple physical locations in a seamless manner. In order for service providers to meet their quality of service objectives, it is important to examine how software architectures can be described to take full advantage of the capabilities introduced by such
more » ... orms. When dealing with software systems involving numerous loosely coupled components, architectural constraints need to be made explicit to ensure continuous operation when allocating and migrating services from one host in the Cloud to another. In addition, the need for optimising resources and minimising overprovisioning requires service providers to control the dynamic adjustment of capacity throughout the entire service lifecycle. We discuss the implications for software architecture definitions of distributed applications that are to be deployed on Clouds. In particular, we identify novel primitives to support service elasticity, co-location and other requirements, propose language abstractions for these primitives and define their behavioural semantics precisely by establishing constraints on the relationship between architecture definitions and Cloud management infrastructures using a model denotational approach in order to derive appropriate service management cycles. Using these primitives and semantic definition as a basis, we define a service management framework implementation that supports on demand cloud provisioning and present a novel monitoring framework that meets the demands of Cloud based applications.
doi:10.1007/s10586-011-0152-0 fatcat:lnoeylkauzg6vgvfmwwyexq4ai

Predictive Resource Scheduling in Computational Grids

Clovis Chapman, Mirco Musolesi, Wolfgang Emmerich, Cecilia Mascolo
2007 2007 IEEE International Parallel and Distributed Processing Symposium  
The integration of clusters of computers into computational grids has recently gained the attention of many computational scientists. While considerable progress has been made in building middleware and workflow tools that facilitate the sharing of compute resources, little attention has been paid to grid scheduling and load balancing techniques to reduce job waiting time. Based on a detailed analysis of usage characteristics of an existing grid that involves a large CPU cluster, we observe
more » ... grid scheduling decisions can be significantly improved if the characteristics of current usage patterns are understood and extrapolated into the future. We describe a formal framework that uses Kalman filter theory to predict future CPU resource utilisation. This ability to predict future resource utilisation forms the basis for significantly improved grid scheduling decisions. The paper describes the architecture for such a prediction and grid scheduling framework and its implementation using Condor. By way of replicated experiments we demonstrate that the prediction achieves a precision within 15-20% of the utilisation later observed and can significantly improve scheduling quality, compared to approaches that only take into account current load indicators.
doi:10.1109/ipdps.2007.370306 dblp:conf/ipps/ChapmanMEM07 fatcat:qskvpfssmnbmfgb5mwldlqdquy

Measuring the diffusion of marketing messages across a social network

Mark Rogers, Clovis Chapman, Vasileios Giotsas
2012 Journal of Direct Data and Digital Marketing Practice  
The last few years have seen signifi cant investment in social media as an adver sing, marke ng and customer outreach opportunity. In the US alone, in 2010, almost $ 1.7 bn was spent by adver sers on social media marke ng, with 53 per cent specifi cally allocated to Facebook 1 . Due to the explicit links that users maintain with each other, social media pla orms are perceived as a highly suited environment for network-based marke ng: word-of-mouth marke ng, diff usion of innova on, or buzz and
more » ... iral marke ng 2 all aim to take advantage of the rela onships between users to facilitate the spread of awareness or adop on. In order to predetermine the eff ec veness of such campaigns, it is important to be able to es mate poten al return on investment. In par cular, the ability to model exis ng networks, track the propaga on of marke ng messages and es mate customer exposures and impressions are essen al for this purpose. A wide range of techniques to measure no ons such as user engagement on such pla orms have been developed and there also exists a signifi cant amount of research on modelling contagion and diff usion in network-based environments that can be exploited to generally refi ne an overall marke ng strategy. However, the structure and proper es of diff erent social media pla orms introduce various constraints on both the means via which data propagate and the visibility of content and nodes, constraints that must be taken into account when modelling or measuring the impact of social media campaigns. Perfect informa on about exposures within a given graph to a given message will not be available and as such it is important to inves gate and defi ne methodologies for diff usion monitoring that are suited to specifi c pla orms.
doi:10.1057/dddmp.2012.25 fatcat:7mao6br4zfhgbkuuiquou5nnhy

Using JULE to generate a compliance test suite for the UML standard

Panuchart Bunyakiati, Anthony Finkelstein, James Skene, Clovis Chapman
2008 Proceedings of the 13th international conference on Software engineering - ICSE '08  
The Java-UML Lightweight Enumerator (JULE) tool implements a vitally important aspect of the framework for software tool certification -test suite generation. The framework uses UML models as the test inputs for the bounded exhaustive-testing approach. Within a size bound for the metamodel types, JULE enumerates only the set of nonisomorphic models in the form of relational structures. These models are classified into two sets -demonstration and counterexample -using Binary Decision Diagrams
more » ... Ds). The power of JULE lies in its model enumeration and its use of a high-performance grid infrastructure. Hence, JULE efficiently generates a very small test suite while increasing the bound on the input size to the extent that is practical for certification purpose.
doi:10.1145/1368088.1368212 dblp:conf/icse/BunyakiatiFSC08 fatcat:o7cev5ckdnbslhf2igpb7vkmc4

Software architecture definition for on-demand cloud provisioning

Clovis Chapman, Wolfgang Emmerich, Fermín Galán Márquez, Stuart Clayman, Alex Galis
2010 Proceedings of the 19th ACM International Symposium on High Performance Distributed Computing - HPDC '10  
Cloud computing is a promising paradigm for the provisioning of IT services. Cloud computing infrastructures, such as those offered by the RESERVOIR project, aim to facilitate the deployment, management and execution of services across multiple physical locations in a seamless manner. In order for service providers to meet their quality of service objectives, it is important to examine how software architectures can be described to take full advantage of the capabilities introduced by such
more » ... orms. When dealing with software systems involving numerous loosely coupled components, architectural constraints need to be made explicit to ensure continuous operation when allocating and migrating services from one host in the Cloud to another. In addition, the need for optimising resources and minimising overprovisioning requires service providers to control the dynamic adjustment of capacity throughout the entire service lifecycle. We discuss the implications for software architecture definitions of distributed applications that are to be deployed on Clouds. In particular, we identify novel primitives to support service elasticity, co-location and other requirements, propose language abstractions for these primitives and define their behavioural semantics precisely by establishing constraints on the relationship between architecture definitions and Cloud management infrastructures using a model denotational approach in order to derive appropriate service management cycles. Using these primitives and semantic definition as a basis, we define a service management framework implementation that supports on demand cloud provisioning and present a novel monitoring framework that meets the demands of Cloud based applications.
doi:10.1145/1851476.1851485 dblp:conf/hpdc/ChapmanEMCG10 fatcat:3xxau4foy5c2xj2aqtqoslxtau

Monitoring Services in a Federated Cloud [chapter]

Stuart Clayman, Giovanni Toffetti, Alex Galis, Clovis Chapman
Achieving Federated and Self-Manageable Cloud Infrastructures  
More details of this work can be found in (Chapman, Emmerich, Marquez, Clayman, & Galis, 2011) .  ... 
doi:10.4018/978-1-4666-1631-8.ch013 fatcat:qjta7akblffizew27y7cdpsj2y

Page 94 of National Union Catalog Vol. 5, Issue [page]

1953 National Union Catalog  
Title, BT875.C48 226.8 53-8132 { om Clovis Gillham, 1 7 one men. New York, Abingdon Press ,1956, & ible Dies. 1.  ...  War- renton, Va., Warrenton Anti eg) tam 1954. 0p.” luk, mapa Ch fol ngeted) 24 uquier Co., 2 FIC Chappell, Clovis Gillham, 1882- In parables.  ... 

Page 426 of National Union Catalog Vol. 4, Issue [page]

1948 National Union Catalog  
York, Skefington 10491, mie oe : Wellesley Desmond Mountjoy Chapman-Huston.  ...  Barcelona, Editorial Juventud (1945, DP238.P517 923.146 48-12419* ee eeen, William Charles Mortimer, Chapman, 1907- Chapman, jirm, publishers see Portrait and biographical album of Warren County, Illinois  ... 

Page 366 of The Journal of Geology Vol. 68, Issue 4 [page]

1960 The Journal of Geology  
of the Champlain Sea and the Gilbert Gulf (by Chapman, 1937, and by Fairchild, 1928), William A.  ...  Of the two major fluted-point types currently recog- nized by archeologists in the western United States—Clovis-fluted and the younger Fol- som-fluted—Clovis-fluted points are most similar to the fluted  ... 

Page 227 of Southwestern Medicine Vol. 37, Issue 4 [page]

1956 Southwestern Medicine  
Chapman, M. D. ROSTER OF GUEST SPEAKERS Carleton B. Chapman, M. D. Professor of Medicine Southwestern Medical School Dallas, Texas John H. Moyer, M. D.  ...  Clovis 9:00 - 9:30 a. m. “Fluid and Electrolyte Balance in Surgery” Morris J. Fogelman, M. D. 9:30 - 10:00 a. m. “Pharmacodynamics and Therapeutic Uses of Diuretics” John H. Moyer, M.  ... 

Page 271 of Current Geographical Publications Vol. 7, Issue 10 [page]

1944 Current Geographical Publications  
., 71, 123 Chapman, B. B., 49, 134 Chapman, Carl, 154 Chapman, L. J., 45 Chapman, 0. M., 80 Chapman, Sydney, 182 Chariton River, Iowa-Mo., 189 Charleston, S. C., 92 Charlesworth, M.  ...  A., 41 Clovis, N. Mex., 157 Clyde, Constance, 137 Clyde, G. D., 22 Coalinga quadrangle, Calif., 157 Coast Range, British Columbia, 25 Coastal Plain, Ga., 187 Cobban, Alfred, 130 Coburn, J.  ... 

The Pleistocene—Holocene Transition in the Eastern United States [chapter]

Dan F. Morse, David G. Anderson, Albert C. Goodyear
1996 Humans at the End of the Ice Age  
Comer-notched Early Archaic points consistently date from 9,500 to 8,800 BP (Broyles 1971; Chapman 1976 ).  ...  Pre-Clovis Remains No satisfactory evidence exists at the present for "Pre-Clovis" occupation(s) in the East.  ... 
doi:10.1007/978-1-4613-1145-4_16 fatcat:bvf2z3yc45hablatnrhaqpxn6i

Page 627 of The Imperial Review : Or, London, Edinburgh, and Dublin Literary Journal Vol. 2, Issue 8 [page]

1804 The Imperial Review : Or, London, Edinburgh, and Dublin Literary Journal  
IND Chaleut, many fur lay par Pre- volt - - - 258 Chapman, Geotge: Onaclaffical edu- cation - - - - 623 Charlemagne.  ...  On the morning fervice 458 Claffical education, advantages of, by Chapman - - - - = 623 —— learning, commentarics on, by Urquhart - - --- 197 Clergy.  ... 

Page 364 of JAOA: The Journal of the American Osteopathic Association Vol. 49, Issue SUPPLEMENT [page]

1950 JAOA: The Journal of the American Osteopathic Association  
Chapman, D.O General Practice and General Surgery James C. Chapman, D.O General Practice and Surgery Neil R. Kitchen, D.O Internal Medicine F. P. McCann, D.O General Practice and Urology Richard O.  ...  Richard, from Clovis, N. to Miller Hospital, 301 S. E. Colorado Portales, N. Mex. Pelsma, Elizabeth A., from 1124 Wall St., to 639 Rosemont St., La Jolla, Calif. Peterson, N. L., from Washington, D.  ... 

Page 43 of Ranch and Rural Living Vol. 39, Issue 1 [page]

1958 Ranch and Rural Living  
Lucille Chapman, San Angelo, Texas 2. The owner is Texas 3.  ...  PHILLIPS, Editor Sworn to and subscribed before me this 15th day of September, 1958 LUCILLE CHAPMAN Notary Public in and for Tom Green County, Texas My Commission expires June |, 1959 H. M.  ... 
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