By András Horváth, Katinka Wolter
This e-book constitutes the court cases of the eleventh eu Workshop on functionality Engineering, EPEW 2014, held in Florence, Italy, in September 2014. The 18 complete papers awarded during this quantity have been conscientiously reviewed and chosen from 30 submissions. The papers are prepared in topical sections named: cloud functionality modelling; queueing and fluid types; functionality of computation and programming; becoming; city site visitors modelling; determination making; and Markovian versions, above and beyond.
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Within the context of the teleteaching undertaking Virtuelle Hochschule Oberrhein, i. e. . digital college of the higher Rhine Valley (VIROR). which goals to set up a semi-virtual collage, many lectures and seminars have been transmitted among distant destinations. We therefore encountered the matter of scalability of a video circulate for various entry bandwidths within the web.
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In line with the lectures given on the Seminaire de Theorie des Nombres de Paris in 1990-1991, this number of papers displays paintings in lots of parts of quantity thought, together with: cubic exponential sums; Riemann's interval family; and Galois representations connected to issues on Shimura types.
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Extra resources for Computer Performance Engineering: 11th European Workshop, EPEW 2014, Florence, Italy, September 11-12, 2014. Proceedings
Customization incorporates the features offered by the middleware, as additional components and modified performance parameters, within a specialized middleware sub-model that is finally composed with the application model. The composed models are correct by construction, as long as the specifications given by the user were correct. The authors are currently extending the library of middleware to include group communication and implementing an automated process on the Eclipse platform. Acknowledgements.
2(b): RMI, RMI with encryption (RMI+E), REST, EJB, EJB with encryption (EJB+E) and SOAP. 005 ms/KB cFixServMan, cVarServMan 1 ms. 023 ms/KB Fig. 9. System Response Time [ms] for various middleware compositions The performance models were solved for a user think time of 3000 ms and a number of users ranging from 50 to 900, with the results in Fig. 9 and Fig. 10. From Fig. 9, the system response time is small (about half a second) for all cases, up to about 400 users. Above this number the curves turn up at a point we will call the point of contention, which is different for different middleware.
For example, suppose middleware with the specialized sub-model m1 is used for the entire application, except for using m2 for calls from task t1 to task t2, and (within that group) m3 for calls from entry e1 to e2. 3. calledEntry (respectively), and the entities between them are instantiated as new entities unless they are explicitly bound to existing entities. Just as for features, tasks and hosts in the MWSubModel may be bound to entities in the application model by a bind directive following the join-call specification.