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Description and evaluation of elasticity strategies for business processes in the Cloud

Abstract : Elasticity is the ability of a system to be adjustable to workload change by allocating and releasing as many resources as needed while ensuring the agreed QoS. It has played a pivotal role in many research works for ensuring QoS. Therefore, Elasticity management is witnessing a lot of attention from IT community as a pivotal issue for finding the right tradeoffs between QoS levels and operational costs by working on developing novel methods and mechanisms. However, controlling business process elasticity and defining non-trivial elasticity strategies are challenging issues. Elasticity strategies are policies that are used to manage elasticity by deciding when, where and how to use elasticity mechanisms (e.g, adding or removing resources). Many strategies can be defined to ensure applications elasticity. The abundance of possible strategies requires their evaluation and validation in order to guarantee their effectiveness before using them in real Cloud environments. Our thesis work aims to overcome the limitations of the existing approaches for elasticity strategies management. It consists in developing a configurable Domain-Specific language to describe different types of elasticity strategies in a unified way. We define a formal model that captures a set of QoS metrics and defines elasticity operations. This model will also be used to define and verify elasticity strategies. We will also work on the alignment of Service Level Agreements with the elasticity strategies.
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Submitted on : Monday, December 2, 2019 - 1:10:00 AM
Last modification on : Friday, October 23, 2020 - 5:02:30 PM
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  • HAL Id : tel-02388507, version 1

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Aicha Ben Jrad. Description and evaluation of elasticity strategies for business processes in the Cloud. Modeling and Simulation. Université Paris-Saclay; École nationale d'ingénieurs de Tunis (Tunisie), 2019. English. ⟨NNT : 2019SACLL012⟩. ⟨tel-02388507⟩

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