DPS-Yemane-Shareme CSMM Model for Client –Side SLA of Green Cloud Services Measuring and Monitoring

Abstract

Substantial development of Information & Communication Technologies (ICTs) has imprinted a great role for our lives and lifestyles. The ICTs provide a convenient environment for the customer for computing, communication, and collaboration. The Cloud Service Providers (CSPs) offer several types of IT resources/services via the internet. These are provided based on a service level agreement (SLA) signed by both the parties i.e. CSPs and Customers/Clients. As a matter of fact, several trust violations and lack of transparency have been observed in terms of metering of consumed cloud services along with nonfunctional requirements promised (i.e. quality, availability/uptime and greenness) in products/services provided by CSPs over the cloud. In order to establish a satisfactory trust and transparency in billing & metering of services; a trusted environment is needed. As a primary investigation, several discrepancies are observed in billing because SLAs are designed and used by CSPs side only for measurement and billing along with the Quality assurance of Services (QoS). It implies that CSPs have no transparency and monopoly on the measurement and billing systems. This study is an effort to empower the cloud clients/customers through introducing a new client-side metering and billing system model for consumed cloud services. This system can help the customer to cross verify the measured/metered and billed services with promised quality like attributes like greenness. It can assure better transparency and trusted billing. This paper considers the performance, service outage, performance satisfaction, update, violation, and greenness etc. Finally, a Simulated Model for Client-Side Metering and Monitoring of SLA termed as DPS-Yemane-Shareme CSMM Model is developed and validated using E-Draw Max, AppNeta and 42U.

Keywords: Cloud computing, Service provider, DPS-Yemane-Shareme CSMM Model, Customer SLA, Green, CSP