Youhuizi Li

Characterizing the Effectiveness of Query Optimizer in Spark

2018

In the big data community, Spark has been widely used for processing interactive queries. Spark employs a query optimizer, called Catalyst, to provides a set of optimization rules and supports Cost-Based Optimization (CBO). In this …

Energy Aware Virtual Machine Scheduling in Data Centers

2019 · Energies

Power consumption is a primary concern in modern servers and data centers. Due to varying in workload types and intensities, different servers may have a different energy efficiency (EE) and energy proportionality (EP) even while …