Distributing a higher level of availability is one of the largest challenges for all cloud service providers. The main purpose is to present a systematic review and discuss cutting-edge solutions for cloud computing. Contributors expect that the observation of such solutions will be used as starting points to address some of the problems that exist in the cloud computing field. Although hard to measure, standard methods of calculating. Availability is determined as a percentage of the time that an application and its services are available when given a specific time interval. In the past year, cloud services have only been unavailable for less than 5.25 minutes per year. This has become a notable achievement in cloud computing corporations as high availability is usually extremely difficult to produce in the modern business world. To clarify, averages at least 99.999% availability for all. Many of the available systems are fault-tolerant systems without a single point of failure. In other words, if a system component fails, the service provided by that component will not necessarily be terminated.