, Zurich University of Applied Sciences
, Texas Tech University
Abstract—Data centers should be among the most automated, robust environments on the planet. Instead, they often remain stuck in the past as agglomerations of outdated technologies. It is time to take this problem seriously and directly address the needs of data centers for modern automation and control through analytics-driven methods.
Computation now extends widely and deeply into all areas of society, business, and educational fields. This trend is only increasing with time. In light of the deep dependence on advanced computation in all areas of life, it is necessary to re-examine the role of the data centers that support these functions, taking into account considerations of security, speed and latency of access, dynamic provisioning of resources, transportability, protection, and provenance of data, as well as other engineering factors.
The goal of this special issue is to present original articles on new methods that extend the state of the art and that highlight best practices to achieve highly capable, robust, scalable data centers that are well-suited to serving the infrastructure needs of large-scale clouds in an increasingly distributed world. From mega- to micro-data centers and edge nodes, diverse architectural choices emerge, each with its own new challenges. The data centers themselves, of course, exist only within the context of complete data processing ecosystems, and so their designs have to be responsive to the needs of their particular workflows, user communities, and software and hardware providers.
After a rigorous selection in which the vast majority of submissions were not possible to include for space reasons, but all were evaluated carefully, we are delighted to present in this special issue three compact, very well thought out and well-presented articles that address important themes concisely and with, we believe, deep insight.
These articles each take on an important aspect of the use of data centers. In the article “Accelerator Virtualization in Fog Computing: Moving from the Cloud to the Edge,” authors Blesson Varghese, Carlos Reaño, and Federico Silla consider the complete relationship between cloud and edge computing, addressing ways in which technology is needed to accelerate functional operations at each stage of processing. This is a very comprehensive article that takes on a number of topics that relate to the effective use of clouds in fog computing, as well as the performance and communication factors that must be considered.
The article “Boosting Energy Efficiency and Quality of Service through Orchestration Tools,” by Alessandro Carrega, Giancarlo Portomauro, Matteo Repetto, and Giorgio Robino, proposes a novel approach to the related problems of improving energy efficiency and performance through application of new software orchestration paradigms to provide and update context information automatically for elastic services. They present not just a concept for such quality-of-service (QoS) improvement, but also an experimental framework that can be evaluated and implemented by others interested in this problem.
Finally, the article “PRTuner: Proactive-Reactive Re-Replication Tuning in HDFS-based Cloud Data Center,” by Thanda Shwe and Masayoshi Aritsugi, gives a specific, sophisticated, and highly replicable example of application of modern analytics methods to important problems in managing storage in large-scale data center environments. Their analysis places this work into context with other similar systems so that its conclusions can be applied to other settings.
We would like very much to acknowledge the work of the reviewers for this issue, which according to the review procedures for IEEE Cloud Computing must remain anonymous, but who each devoted a large amount of time interacting with the authors of approximately five times as many papers as we have the space to present to you in this final collection. In many cases, the fruits of their work are reflected not only here but also in future versions of the paper submissions we did not have room to include but expect will appear in other venues and publications in the future.