Green IT – Available data and guidelines for reducing energy consumption in IT systems

Abstract

Green IT has become one of the most discussed topics in the last new years. However, the related literature is dispersed and it is difficult to give precise definitions. Nowadays saving energy is an interesting and interdisciplinary key challenge. Hardware manufacturers and designers have usually handled the problem, in the field of IT, but recently software energy efficiency gathered the interest of industry and academic research. However, writing energy efficient software requires proper metrics to evaluate it. In the literature it is possible to find metrics related to several aspects of software evaluation such as complexity, performance, maintainability, reliability, and so on but there is still a gap for energy related metrics. In this paper we:-Introduce a taxonomy of concepts related to energy and IT;-Present the most recent data on energy consumption trends organized according to the taxonomy;-Present some guidelines to write energy efficient software organized according to the taxonomy. Our contribution is twofold:-Provide available information in a better organized way;-Underline what is missing and what can be done to make the context clearer as well.

Studying the effect of institutional pressures on the intentions to continue green information technology usage

“…GIT is an efficient resource consumption that utilizes IT infrastructure as well as deployment managerial, human practices, and organizational policies towards reducing the negative effect of IT (Molla et al 2014). Numerous organizations have been recommended to have GIT on their agenda (Ardito and Morisio 2014), and fastened to their strategies (Hernandez and Ona 2016) to reach the full benefits of GIT.…”

An empirical study of practitioners' perspectives on green software engineering

“…Abbreviated versions of the final 36 statements are shown in Figures 2 to 7 and a complete copy is available online. 1 In addition, we asked free response follow up questions for areas of particular interest when the response to a question indicated the respondent may have insight or evidence to share. For example, if a respondent indicated that their applications have energy usage goals or requirements, we asked them to provide an example.…”

“…There is also research focused on both developing tools to help developers examine/improve the energy usage of their applications (e.g., [5,18,19,21,36,56]), and on models to support the green software development process [1,41]. Additional information about such existing work is provided in Section 5 where we discuss state-of-the-art green software engineering research in the context of our study's findings.…”

Economic feasibility study of a fuel cell-based combined cooling, heating and power system for a data centre

“…There are a number of studies on the general energy efficiency of data centres and their cooling alternatives in the literature [18][19][20][21][22][23][24][25]. Schmidt et al [26] looked into powering and cooling a modern centre via co-generation.…”