Samet Sait Talayhan - 101044044 A Green Software Development Life Cycle for Cloud Computing 

Dark side of Cloud The computers behind the cloud are responsible for 2% of global carbon emissions 

The Carbon footprint of large datacenters and IT infastructures, but what about the software ? 

Green Cloud Computing Framework Blue-colored components in the figure indicate cloud services building blocks, and green indicates opportunities for energy efficiency against these components. 

Green Cloud Framework o Service Level Agreements, CSP, high performance, credit system. o Software, OS, compilers, scheduling, active CPU time, VMs o Cloud Infrastructure, hardware, storage, network devices design and impl. o Hardware, scalability is key, changing requiremets o Network, additional communication translates into add energy consumption. o Virtualization, multiple logical machines, low load machines can be shut down o Operational Efficiency, policies, efficient datacenter administration, and e-waste management. 

The Green SDLC Principle oSoftware Requirement Specification, non-functional, security, performance. Benchmarks, metrics, meausure energy consumption. oDesign, a good design also cover energy consumption. GUI design, Security AES,DES,RC2 oImplementation,have several tiers of abstraction, programming language, garbage c. oTesting, save time, money, energy. How to measure energy use. oMaintenance, monitoring, track energy use. IaaS, PaaS, SaaS, 

Energy efficieny currently has a low priority for most cloud stakeholders. 

References o Nitin Singh Chauhan and Ashutosh Saxena. (2013). A Green Software Development Life Cycle for Cloud Computing. GREEN IT. 11 (3), 28-34. o Bryan Walsh. (2014). Your Data Is Dirty: The Carbon Price of Cloud Computing. Available: http://time.com/46777/your-data-is-dirty-the- carbon-price-of-cloud-computing/. Last accessed 2nd May 2015. 

Thank you! Talayhan Samet, 5/2015 @talayhans Talalyhan.me