Analyzing the Waiting Energy Consumption of NoSQL Databases

NoSQL database (NoSQL DB) covers the shortage of traditional database and has been widely used in recent years. Currently, researches on NoSQL DB mainly focus on performance issues, few of them are about energy consumption (EC) evaluation and optimization. Waiting Energy Consumption (WEC) is another critical reason causing energy waste besides computer idleness. Study the WEC regularities of NoSQL DB facilitates achieving real "green computing". This paper first analyzes the model and measurement approaches of EC, then designs test cases to study the WEC regularities, finally proposes approaches of "reducing WEC" for EC optimization. Plenty of experiments show that, despite that NoSQL DB is an application of "green cloud computing", the ECs of selected NoSQL DBs are widely divergent, and some of them remain to be further optimized.