A survey of fault tolerance architecture in cloud computing

Utilizing cloud computing services has had numerous advantages such as the reduction of costs, development of efficiency, central promotion of soft wares, compatibility of various formats, unlimited storage capacity, easy access to services at any time and from any location and, most importantly, the independency of these services from the hardware. It should be mentioned that the provision of various cloud computing services is faced with problems and challenges that the fault tolerance can be mentioned as the main restrictions.In this paper, first, methods of creating the capacity of Fault Tolerance in Cloud computing are pointed out. Subsequently, policies of the implementation of these methods are stated. Next, the offered architectures for the production of such capacity in Cloud computing is delineated and, finally, they are compared in terms of the type of policy or policies employed in the architecture and the method of fault detection and fault recovery.