Book excerpt: Global data center energy use was estimated at 1.1% of total energy use in 2012 and is expected to increase to 2.5% by 2020. Indonesian data centers used an estimated 1.5% of total electricity generating capacity in 2014 and are expected to use between 2.0% and 3.0% by 2017. This report assesses the Indonesian data center industry in terms of energy use, energy saving potential, market trends, growth opportunities, and major challenges. This report shows how Indonesia and other developing countries can attain up to 30% energy savings and improve the effectiveness, sustainability, and global competitiveness of data centers by adopting internationally proven energy efficiency measures.