Abstract
Recently, Service Level Agreement (SLA) and green SLA (GSLA) becomes very important for both the service providers/vendors and as well as for the 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 IT ethics issues for sustainable development. That is why green SLA (GSLA) already came into play for achieving sustainability in the industry. Nevertheless, the current practice of GSLA in the industry do not respect the sustainability at all. GSLA defined as a formal agreement incorporating all the traditional commitments respecting some green computing parameters such as carbon footprint, energy consumption etc. Therefore, there are still gaps for achieving sustainability through existing GSLA. To reach the goal of achieving sustainability and getting more customers, many IT (Information Technology) and ICT (Information and Communication Technology) business are looking for a real GSLA which would meet the ecological, economical and ethical aspects (3Es) of sustainability. This research discovers the missing parameters and introduce new parameters under sustainability hoods. In addition, it defines GSLA of sustainability with new green performance indicators and their measurable units. It also discovers the management complexity of proposed new GSLA through designing a general informational model and identifies various new entities and their effects with other entities under three pillars of sustainability. The ICT engineer could use the informational model as a guideline to design a sustainable GSLA for the industry. Therefore, the proposed model could help different service providers/vendors to define their future business strategies for the upcoming sustainable society.
Highlights
Nowadays, cloud and grid computing and many data centers acts as most promising service providers
The details literature review and analysis are based on existing work in the field of Service Level Agreement (SLA), green SLA (GSLA), green computing, energy optimization in IT industry, impact of ICT on environment and natural resource, IT ethics issues, IT for Sustainability etc
Amount of ICT product reuse/ percentage of ICT equipment refurbished/ percentage of IT equipment sub cycled or up cycling; Information about using toxic material in ICT product and their limit level; Indication about the perfect time to change an ICT equipment; Amount of electromagnetic energy radiation; usually the strength is measured by frequency; The noise emitted from ICT equipment e.g. Ringtone of Cell phone, noise in data center; The aesthetic aspect of ICT industry e.g. installing an antenna in a beautiful landscape or roof top; The light pollution generated by ICT equipment e.g. Computer Screen; Unit gm OR % (Percentage) OR Recycling Rate (RR)[0~1] [8]
Summary
Cloud and grid computing and many data centers acts as most promising service providers. The growth rate of SLA in recent time is increasing as well as the need of GSLA for actual sustainability achievement in IT industry [4]. Many IT and ICT industries or service providers need to think about their business scope in the light of green perspective to achieve sustainability. With the increase attention that green informatics and sustainability practice within our society, it is timely to conduct SLAs for traditional/basic computing performance metrics or only on energy or carbon footprint issues, and to relate the effort of conducting green computing with respect to 3Es of (Ecology, Economy and Ethics) sustainability pillars [4]. Defining new GSLA using informational model section helps the ICT engineers to define and manage future sustainable GSLA with newly identified missing green parameters to respect true sustainability. The conclusion gives brief discussion about few challenges and future plan of this sustainable GSLA research
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