At the end of the nineties the Internet gave birth to the so-called Application Service Providers (ASP) model which in many regards can be seen as a predecessor of this first booming and most successful type of cloud computing: SaaS or Software as a Service, simply said the use of software via a cloud-enabled subscription model.

SaaS: The capacity of running software applications in the cloud and de facto also used for (vendors of) applications in the cloud and sourced from the cloud as a service with a gradual increase of less typical applications than in the earlier days (CRM and ERM still account for the majority of spending though, with other early stage Saas applications such as web servers, collaborative applications, email and social apps to name a few) and increasingly including more mission-critical applications. The growth of public cloud is remarkable, also in mission-critical workloads, beyond more traditional applications such as public cloud storage Yet, as mentioned, some companies are pulling some workloads back from the public cloud to some form of private cloud. The cloud is rooted in many technologies and evolutions, from very old ones such as distributed communications, grid computing and client-server to newer ones such as the Internet and its predecessors and enabling protocols, the virtualization of hardware and network resources, the ASP (Application Service Provider) model (using software as an off-premise subscription service via the Internet instead of installing it locally with potentially many licenses and a lot of maintenance and resources) and much, really much, more.

Simply put, workloads describe the several independent tasks, services and requests of (different parts of) applications and IT systems which require computing resources including code processing. Cloud computing is also one of the essential enablers of Industry 4.0 , has been shaping the software and business applications market for over a decade and has an important place in the development of the Internet of Things or IoT , to give just a few examples. Cloud computing definitions, cloud services (SaaS, PaaS, IaaS), cloud delivery models (public cloud, private cloud, hybrid cloud and community cloud), cloud benefits, cloud myths, cloud adoption, cloud strategies and cloud evolutions explained with market forecasts and a look at fog computing.

Public cloud computing, offered by companies like Amazon Web Services, Microsoft Azure, and my employer, Google Cloud, is still viewed by many as a cheaper and more efficient way for companies to store and process data. Broadly speaking, there are 3 models of cloud computing which describe the service on offer; these are Software as a Service (SaaS), Platform as a Service (PaaS) and Infrastructure as a Service (IaaS). A public cloud is where services and infrastructure are hosted off-site by a cloud provider, shared across their client base and accessed by these clients via public networks such as the internet.

Although cloud computing has changed over time, it has been divided into three broad service categories: infrastructure as a service ( IaaS ), platform as a service ( PaaS ) and software as a service ( SaaS ). Private cloud services are delivered from a business’s data center to internal users. The majority of cloud computing infrastructure, today, consists of reliable services delivered through data centers and built on servers with different levels of virtualization technologies.

Cloud management is a concept that means a user has control over everything that operates in a cloud: the data, applications, and services. Sharing resources through hardwired connections is quickly being replaced with a delivery method that provides virtual infrastructure, services, platforms, and applications on-demand, across networks. Whether you are running applications that share photos to millions of mobile users or you’re supporting the critical operations of your business, the cloud” provides rapid access to flexible and low cost IT resources.

HPC cloud refers to the use of cloud computing services and infrastructure to execute high-performance computing (HPC) applications 105 These applications consume considerable amount of computing power and memory and are traditionally executed on clusters of computers. In the software as a service (SaaS) model, users gain access to application software and databases. The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, or storage, but has control over the deployed applications and possibly configuration settings for the application-hosting environment.

“Infrastructure as a service” (IaaS) refers to online services that provide high-level APIs used to dereference various low-level details of underlying network infrastructure like physical computing resources, location, data partitioning, scaling, security, backup etc. Not only would all business software move to the Web, but what they termed cloud computing-enabled applications” like consumer file storage would become common. Software for major business applications (such as customer support, sales, and marketing) has generally been run on corporate servers, but several companies now provide it as an on-demand service.

Cloud computing is a technology which uses internet and one remote server to maintain data and various applications. Cloud computing allows consumers and businesses to use applications without installation and access their personal files at any computer with internet access. Yet cloud computing, public or private, has become the platform of choice for large applications, particularly customer-facing ones that need to change frequently or scale dynamically.

Although businesses sometimes migrate legacy applications to the cloud to reduce data center resource requirements, the real benefits accrue to new applications that take advantage of cloud services and cloud native” attributes. IDaaS providers maintain cloud-based user profiles that authenticate users and enable access to resources or applications based on security policies, user groups, and individual privileges. Just as SaaS delivers applications to users over the internet, public APIs offer developers application functionality that can be accessed programmatically.

Security: For smaller companies in particularly, cloud computing allows them to use more secure services and storage than they would be able to manage on their own — as long as they pick a reliable provider that provides up-to-date patches. Speed: Cloud speeds depend a lot on internet connections and server up time, but accessing cloud services is generally a lot easier for companies, especially if their local devices might struggle to run that software all on their own.


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