The fourth and final workshop of last week’s Greening of Streaming (GoS) conference in Brussels focused on the topic of “Hardware and Infrastructure Optimization”, striving to reduce energy expenditure of processes like encoding or caching by associating them with emerging technologies. Each idea was more interesting to talk (and hear) about than the previous one, but they are not all as easily realizable. First, GoS founder Dom Robinson was eager to speak about immersion cooling, which would replace the usage of fans to cool down high performance computing hardware—which vendors say can represent up to 40% of all datacenter energy expenditure—by lowering the computers into mineral cooling oil. The heat generated by the servers could then be transferred to warm…