A technical survey on various VDC request embedding techniques in Virtual Data Center

Cloud is a promising architecture for diversified areas of computing and communication paradigm for ease, efficient, on the spot solution for all computing needs of everyone. Most of the people are using cloud directly or indirectly to avail the resources like software, platforms and infrastructure according to their need. With the increase in need, the size of the data center which maintains the data has to be expanded and distributed geographically for achieving efficacy in providing the services. To make the efficient use of available resources, the concept of Virtual Data Center (VDC) plays a vital role in achieving high revenue for the infrastructure providers. In effect to the high resource utilization, the power usage also increases, which in turn demands efficient usage of energy. It is also inevitable to reduce the carbon footprint in the future for green environment. The crucial part of the VDC is in how efficiently the incoming requests are handled. VDC request embedding is the one where we can achieve our goals like maximum resource utilization and revenue maximization. In this paper, we surveyed the different VDC request embedding techniques and compared their functionalities. We also looked at how these techniques fared in meeting the Service Level Agreements (SLA) by cloud provider for different Quality of Service (QoS) parameters. This survey mainly focused on the areas where, the performance factors of the cloud infrastructure could be improved and in turn improves the profit of the cloud providers. We discuss the future research directions that can be focused on better VDC request embedding methods.