Priority Based Virtual Machine Allocation and Scheduling for Security in Cloud Computing

Cloud computing relies on the advancement of distributed computing and virtualization technologies to achieve cost efficiency in the consumption of computing resources. Efficient resource allocation is one of the important concerns for cloud users. To satisfy the need of each cloud user in an efficient manner, provision has to be made to make sure that the resources are available to them at all the time. Optimal resource allocation with minimum wastage and maximizing the profit is considered to be challenging. Also once the resources are allocated, isolation among them is critical from security point of view as there exits various kinds of adversary attacks in the real world. In this paper a novel method has been proposed for priority based dynamic Virtual Machine (VM) allocation on the basis of various parameters such as No. of nodes or processor’s request, Time of execution, Importance of user, Amount of storage required etc. and isolation among the allocated virtual machines since the virtualized services, hardware, software and infrastructures share the same physical resources. Also there are chances of adversary users hosted on the same hardware which may lead to various kinds of cross VM attacks and security threats. Finally an approximation technique for resource allocation problem has been addressed which consider each unallocated resource request from user that may lead to penalty for cloud administrator which increases as time elapses. As the resource allocation problem is considered for various applications, particularly for emergency service allocations such as scientific simulations related to cyclone prediction, monsoon prediction, rainfall etc. which needs high performance computational power. Thus allocating the resource request within the predetermined time limit is of primary concern otherwise it may lose its purpose.