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- W1579775597 abstract "The growing use of online services requires substantial supporting infrastructure.The efficient deployment of applications relies on the cost effectiveness ofcommercial hosting providers who deliver an agreed quality of service as governedby a service level agreement for a fee. The priorities of the commercialhosting provider are to maximise revenue, by delivering agreed service levels,and minimise costs, through high resource utilisation.In order to deliver high service levels and resource utilisation, it may benecessary to reorganise resources during periods of high demand. This reorganisationprocess may be manual or alternatively controlled by an autonomousprocess governed by a dynamic resource allocation algorithm. Dynamic resourceallocation has been shown to improve service levels and utilisation andhence, profitability.In this thesis several facets of dynamic resource allocation are examinedto asses its suitability for the modern data centre. Firstly, three theoreticallyderived policies are implemented as a middleware for a modern multi-tier Webapplication and their performance is examined under a range of workloads in areal world test bed.The scalability of state-of-the art resource allocation policies are explored intwo dimensions, namely the number of applications and the quantity of serversunder control of the resources allocation policy. The results demonstrate that current policies presented in the literature demonstrate poor scalability in oneor both of these dimensions. A new policy is proposed which has significantlyimproved scalability characteristics and the new policy is demonstrated at scalethrough simulation.The placement of applications in across a datacenter makes them susceptibleto failures in shared infrastructure. To address this issue an applicationplacement mechanism is developed to augment any dynamic resource allocationpolicy. The results of this placement mechanism demonstrate a significant improvementin the worst case when compared to a random allocation mechanism.A model for the reallocation of resources in a dynamic resource allocationsystem is also devised. The model demonstrates that the assumption of a constantresource reallocation cost is invalid under both physical reallocation andmigration of virtualised resources." @default.
- W1579775597 created "2016-06-24" @default.
- W1579775597 creator A5013907645 @default.
- W1579775597 date "2011-09-01" @default.
- W1579775597 modified "2023-09-23" @default.
- W1579775597 title "Towards effective dynamic resource allocation for enterprise applications" @default.
- W1579775597 hasPublicationYear "2011" @default.
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