SAAS

This chapter presents the main technologies currently used in cloud computing, what are the main commercial offerings and what are their programming models. We discuss hardware virtualization technologies used in datacenters, three different service abstraction levels: infrastructure, platform and application and the main driver and adoption problems in cloud computing.

Cloud computing plays a significant role in the world of computers. It is a modern technology that provides a fast access mechanism, expandable, reliable, and provides user specific-facilities such as software services and infrastructure. Through the Internet, the user can access resources wherever they are, so this technology is beneficial in their daily lives. Cloud services provided by the cloud (SAAS, PAAS, IAAS) enable the user to access programs and the platform. Security is the main problem facing the cloud, so people think that using the cloud and its services is not safe, as there is no guarantee of stored information. Distributed computing is a computer division that explores distributed systems, and a distributed system is a system. That exists on computers connected to the network to be communicated through messages passed between each other. Using distributed computing systems has increased due to lower hardware costs and advances in computer network technologies. Distributed computing systems provide the potential for better efficiency and sharing of resources. This article will give a brief overview of cloud history computing, its evolution, advantages, and security aspects, as well as the history of distributed computing, its structure, applications, benefits, and disadvantages. IJSB 1. Introduction These days, cloud computing has started gaining strong popularity, has moved global, and has begun to attract the attention of the commercial and academic communities. Performance enhancement using the technique of load balancing. We can spread the process and balance between servers for job processing and enhance the efficiency of our distributed system by using load balance between servers (Rashid et al., 2018). Despite all this, its development did not reach the required level until this hour, and searches for it are continuing. Using ERP systems provides the customer with accountability in the entire creation of the company, from which all departments can access recorded information to ensure that the correct procedures are carried out (Google and IBM Announce University Initiative to Address Internet-Scale Computing Challenges, 2007; SUBHI R.M. Zeebaree, Salim, et al., 2020). Cloud computing allows hardware and software programs managed by a company for users to use elsewhere and store data, share information and customer applications, as it provides its services to the user via about the Internet. Hadoop, Dryad, and another map reducing framework are the most common technologies used in the cloud system. There are also several instruments, such as Cap3, HEP, and Cloudburst, used to optimize the cloud system's efficiency. In distributed systems, the Hadoop Distributed File System is used to store and calculate the number of words in a large database. Compared with other applications used for the same reason, Hadoop's performance in distributed systems is obviously very good. Cloud providers need to give customers a good asset to extend their QoS The computations-over-Internet situation refers to the location of the sign-in of multiple customers, taking into account that Internet resources have to be allocated animatedly to concentrate on the cost composition (Alzakholi et al., 2020; Haji et al., 2020; Subhi et al., 2020). Cloud computing has attributes that distinguish it from others, in addition to that it reduces the material cost of the user, reduces management and saves the user from the burden of purchasing and maintaining the infrastructure, all these features have made it an important name in information technology during the current era. Due to over-provision and under-provision issues, the process of supplying clients with shared virtualized resources (hardware, applications, and platform) is a major challenge for the cloud provider (Gowda & Subramanya, 2015; Shukur et al., 2020).