Highlights Some of the Major Issues in Cloud Services and Analysis of Various Data Center Selection Algorithms

M.Nagavalli Department of Computer Science, Thassim Beevi Abdul Kader College for Women, Kilakarai Email: [email protected] Dr.A.R.Nadira Banu Kamal Department of Computer Science, Thassim Beevi Abdul Kader College for Women, Kilakarai Email: [email protected] -------------------------------------------------------------------ABSTRACT--------------------------------------------------------------Resource virtualization is one of the most prominent characteristics of cloud computing. The number of cloud users has been growing exponentially leads to effective scheduling of virtual machines. In cloud computing a user may require a set of virtual machine co-operating with each other to accomplish one task. VMs need to be scheduled on the cloud in order to maximize the utilization with cost effective. The purpose is to minimize the maximum inter-DC distance. In present condition, data center should be selected for multiple incoming from the client is an important issue in cloud computing. Cloud application Service Broker determines which data center should service the request from each user base. Service proximity-based routing selects the data center which has lowest network latency or minimum transmission delay from a user base. If there are more than one data centers in region in close proximity, then one of the data centers is selected at random to service the incoming request. To select appropriate data center for executing a task is an important parameter to improve the performance of cloud computing environment. In this paper we propose the analysis of various data center selection algorithm as well as VM placement techniques. Cloud also faces many issues. Service availability on demand, unpredictability of performance, on-time availability of resources and security are the major challenges in cloud computing.