Download Cloud Computing and Services Science: 5th International by Markus Helfert, Víctor Méndez Muñoz, Donald Ferguson PDF

By Markus Helfert, Víctor Méndez Muñoz, Donald Ferguson

This publication constitutes the completely refereed court cases of the fifth foreign convention on Cloud Computing and providers technology, nearer 2015, held in Lisbon, Portugal, in might 2015.

The 14 revised complete papers provided including one invited paper have been chosen from 146 paper submissions. The papers specialize in the next themes: cloud computing basics; providers technology foundations for cloud computing; cloud computing structures and functions; cloud computing permitting applied sciences; and cellular cloud computing services.

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Extra info for Cloud Computing and Services Science: 5th International Conference, CLOSER 2015, Lisbon, Portugal, May 20-22, 2015, Revised Selected Papers

Sample text

The commodity flow algorithm leads to combine data storage and network latency in one stage to reduce total cost. Our future research will extend the model of the commodity flow to address elasticity through predictions of dynamic incoming demands’ variations or stochastic behavior. This can be done by proposing new polynomial algorithms based on rounding techniques to deal with large problem instances. This will lead to reinforce our broker’s functionalities to give cloud consumers various means to consume proposed cloud resources in a more secure manner with reduced cost.

Thus, to meet end-user QoS requirement, the broker should replicate each D in a selected sub-set of data centers that satisfies: |N | 1− fs ≥ Aexpect (15) s∈ϕC C=1 We derive a mathematical model to efficiently reduce the replication costs noted by Costrep , under the QoS requirements described by the inequality (15). As the number of replicas of each chunk is supposed to be r, we seek an optimal sub-set of data centers of size r to store the replicas of each chunk. Moreover, our solution should not put all the chunks within the same data center to avoid vendor lock-in.

CPLEX Optimizer. com/software/commerce/optimization/ cplex-optimizer/ 23. : Erasure coding vs. replication: a quantitative comparison. , Rowstron, A. ) IPTPS 2002. LNCS, vol. 2429, pp. 328–337. Springer, Heidelberg (2002) 24. : Combinatorial Optimization: Theory and Algorithms. Springer, Heidelberg (2001) 25. : Geometric Algorithms and Combinatorial Optimization. Springer, Heidelberg (1985) 26. : ESPRESSO: an encryption as a service for cloud storage systems. , Stiller, B. ) AIMS 2014. LNCS, vol.

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