Download e-book for kindle: Algorithmic Aspects of Cloud Computing: First International by Ioannis Karydis, Spyros Sioutas, Peter Triantafillou,

By Ioannis Karydis, Spyros Sioutas, Peter Triantafillou, Dimitrios Tsoumakos

ISBN-10: 3319299182

ISBN-13: 9783319299181

ISBN-10: 3319299190

ISBN-13: 9783319299198

This e-book constitutes the completely refereed post-conference complaints of the 1st foreign Workshop on Algorithmic features of Cloud Computing, ALGOCLOUD 2015, held in Patras, Greece, in September 2015 together with ALGO 2015.

The thirteen revised complete papers awarded including 2 instructional papers have been conscientiously reviewed and chosen from 37 preliminary submissions. They conceal quite a lot of issues in major tracks: algorithmic features of large-scale info shops, and software program instruments and allotted architectures for cloud-based facts management.

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Additional resources for Algorithmic Aspects of Cloud Computing: First International Workshop, ALGOCLOUD 2015, Patras, Greece, September 14-15, 2015. Revised Selected Papers

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In practical implementation, the dealer (with no randomizer) can secret share these polynomials to the clouds in advance or let clouds interact with the randomizer, thus supplies on-line these f (x) and g(x) pairs upon requests and the degree reduction process is performed with no involvement of the dealer during the execution. In our proposed architecture, the read/write memory is separated from the read-only memory. This design is more convenient for degree reduction compared with the classic architecture.

Indeed, most packing strategies are based on the maximal demand of each task, what corresponds to Cj + ρj for a task of job j. Taking advantage of the fact that all tasks do not achieve their peak demand at the same time in the day, it is possible to pack more tasks, and therefore to use fewer nodes whilst packing statically all the tasks. The corresponding capacity constraint for a given machine Mk is thus ∀t, Wj (t) ≤ C, j,l: Tj,l ∈Mk Column Generation Integer Programming for Allocating Jobs 39 and it can be rewritten [4] as an expression which does not depend on t: ∀k, Cj + ρj cos(φj ))2 + ( ( j,l: Tj,l ∈Mk j,l: Tj,l ∈Mk ρj sin(φj ))2 ≤ C j,l: Tj,l ∈Mk (1) This modified packing constraint yields a quadratically constrained programming (QCP) formulation of the problem.

Unlike the former RAM-based secure computation models, our scheme hides the client program and data all the time and manipulates the secrets directly. Therefore, no confidential information would be revealed. The setting is particularly interesting in the scope of big data that is stored in secret sharing fashion over the clouds, and there is a need to repeatedly compute functions over the data without reconstructing the data from the shares. Secret Shared Random Access Machine 33 An important observation is that the dealer (and reducer(s)) may share common roots of all polynomials, unknown to the participating clouds, where addition and multiplications keep the roots unchanged.

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Algorithmic Aspects of Cloud Computing: First International Workshop, ALGOCLOUD 2015, Patras, Greece, September 14-15, 2015. Revised Selected Papers by Ioannis Karydis, Spyros Sioutas, Peter Triantafillou, Dimitrios Tsoumakos


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