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Títol:
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CART, a Decision SLA Model for SaaS Providers to Keep QoS Regarding Availability and Performance
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Autor/a:
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Mateo Fornés, Jordi; Solsona Tehàs, Francesc; Vilaplana Mayoral, Jordi; Teixidó Torrelles, Ivan; Rius Torrentó, Josep Maria
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Notes:
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Cloud systems are becoming a powerful tool for business. The evidence of the advantages
of offering infrastructure as a service (IaaS), platform as a service (PaaS), or software as a service (SaaS)
is overwhelming. Therefore, for SaaS providers, it is essential to know the virtual resources required to
optimize the service offered and to keep the quality of service (QoS) at the desired levels. This paper presents
an analytic model cloud availability and response time (CART) for obtaining the best tradeoff between
performance, cost, and availability in a cloud system aimed at providing software as a service. The model
aims to guarantee the predetermined availability and response time (RT) agreed with customers in a servicelevel agreement (SLA) contract while minimizing the cost of the system. A client-transparent error recovery
strategy has been considered along with a Poisson traffic model. A sensitivity analysis of the simulated and
real workloads is presented to study how a specific SLA influences the cloud service performance regarding
the guaranteed RT and availability. The results corroborate the goodness of the model proposed, adjusting the
real system accurately. Furthermore, the obtained results provide useful guidelines for cloud or Web-server
designers.
This work was supported in part by the Intelligent Energy Europe (IEE) Programme, in part by the Ministerio de Economía y Competitividad under Contract TIN2017-84553-C2-2-R, and in part by the European Union FEDER through CAPAP-H6 network under Grant TIN2016-81840-REDT. The work done by F. Solsona-Tehàs was supported by the Generalitat de Catalunya. |
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Matèries:
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-Cloud computing
-Response time
-Availability |
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Drets:
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(c) 2019 IEEE. Translations and content mining are permitted for academic research only. Personal use is also permitted, but republication/redistribution requires IEEE permission. See http://www.ieee.org/publications_standards/publications/rights/index.html for more information
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Tipus de document:
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Article
Article - Versió publicada |
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Publicat per:
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IEEE
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