Recent advances in cloud data centers toward fog data centers

摘要

In recent years, we have witnessed tremendous advances in cloud data centers (CDCs) from the point of view of the communication layer. Arecent report from Cisco Systems Inc demonstrates that CDCs, which are distributed across many geographical locations, will dominate theglobal data center traffic flow for the foreseeable future. Their importance is highlighted by a top-line projection from this forecast that by 2019,more than four-fifths of total data center traffic will be Cloud traffic. The geographical diversity of the computing resources in CDCs providesseveral benefits, such as high availability, effective disaster recovery, uniform access to users in different regions, and access to different energysources. Although Cloud technology is currently predominant, it is essential to leverage new agile software technologies, agile processes, andagile applications near to both the edge and the users; hence, the concept of Fog has been developed.