Abstract
Nowadays, most of the IT (Information Technology) and ICT (Information and Communication Technology) industries are practicing sustainability under green computing hoods. Users/Customers are also moving towards a new sustainable society. Therefore, while getting or providing different services from different ICT vendors, Service Level Agreement (SLA) becomes very important for both the service providers/vendors and users/customers. There are many ways to inform users/customers about various services with its inherent execution functionalities and even non-functional/Quality of Service (QoS) aspects through SLAs. However, these basic SLAs actually do not cover eco-efficient green issues or ethical issues for actual sustainable development. That is why green SLA (GSLA) should come into play. GSLA is a formal agreement incorporating all the traditional/basic commitments as well as respecting the ecological, economical and ethical aspects of sustainability. This research would survey on different basic SLA parameters for various services in ICT industries. At the same time, this survey would focus on finding the gaps and incorporating basic SLA parameters with existing green computing issues and ethical issues for different services in various computing domains. This research defines future GSLA in relationship with ICT product life and three pillars of sustainability. The proposed definition and overall survey could help different service providers/vendors to define their future GSLA as well as business strategies for this new transitional sustainable society.
Highlights
Service Level Agreement (SLA) is defined as a formal document between an IT service provider and one or more customer outlining Service Commitment [1]
The analysis of existing theory work on basic SLAs and green SLA (GSLA) are mentioned in Table I and II
Empirical Work Review section demonstrates most of the basic SLAs performance indicators and their measurable unit for all mentioned services (Table III to Table VI)
Summary
SLA is defined as a formal document between an IT service provider and one or more customer outlining Service Commitment [1]. This research did thorough review on existing basic SLA indicators for network, storage, compute and multimedia domain in IT industry. It goes deep down for finding more current green performance indicators in some datacenter’s SLAs. In addition, a new future GSLA definition proposed, which shows the importance and relationships of ICT product life cycle. Empirical Work Review section indentifies all basic SLA indicators for network, compute, storage and multimedia services, which do not cover any eco-efficient parameters. The existing GSLA subsection shows currents trends of the industry to practice sustainability under greening lens. The conclusion gives brief discussion about few challenges for the ICT engineer to incorporate and trade-off between all existing indicators and new indicators for sustainable achievement in the ICT industry
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