What is Cloud computing? - Amazon Web services

What is Cloud computing?

Cloud computing is the on-demand delivery of computing capacity, database storage, applications and other IT resources through a pay-per-use Internet-based cloud services platform. Whether you're running applications that share photos with millions of mobile users or are supporting business-critical operations, a cloud services platform provides you with fast access to flexible, low-cost IT resources. With cloud computing, you do not have to make big initial investments in hardware and spend a lot of time managing that hardware. Instead, you can provide exactly the right type and size of the computing resources needed to drive your brilliant new idea or operate your IT department. You can access as many features as you need, almost instantly, and pay only for what you use.

Cloud computing provides a simple way to access servers, storage, databases, and a wide variety of application services over the Internet. A cloud services platform, such as Amazon Web Services, owns and maintains the networked hardware required for these application services, while you provision and use what you need through a web application.

Types  of cloud computing

Cloud computing gives developers and IT departments the ability to focus on what matters most and get the job done, such as outsourcing, maintenance, and system capacity. As cloud computing grew in popularity, several different deployment models and strategies emerged to help address the specific needs of users differently. Each type of cloud service and deployment method provides a different level of control, flexibility, and management. Understanding the difference between infrastructure as a service, the platform as a service, and software as a service, as well as the strategies that deployment can use, can help you decide how to organize the service according to your needs.

Cloud computing models

Infrastructure as a Service (IaaS)

Infrastructure as a Service (IaaS) contains the basics for IT in the cloud and generally provides access to network functions, computers (virtual or dedicated hardware), and a data warehouse. IaaS provides the highest level of flexibility and control over the management of your IT is the most similar are the source of many IT departments and developers who are familiar with the flow of IT.

Platform as a Service (PaaS)

The platform as a service (PaaS) eliminates the need for organizations to manage their infrastructure conditions (usually operating systems and hardware) and allows them to focus on deploying and managing their applications. This helps you to be more efficient, you do not have to worry about the capabilities you have, capacity planning, software maintenance, patching, or other undifferentiated heavy work involved in the operation of your application .

Software as a Service (SaaS)

Software as a Service (SaaS) provides finished products that are run on the managed by the service provider. In most cases, we refer to software as a service refers to end-user applications. For the SaaS offering, you do not need to think about how services are maintained or how the situation is managed; You just have to think about how you are going to use that particular software. An example of common SaaS applications is Web-based email that you can use to send and receive email messages without having to manage additional functions for the product's mail server or maintain the operating system on which the program was executed.

Advantages of cloud computing

Here is a list of some of the most important advantages that cloud computing has to offer -

Cost-Efficient- server and tools of our time as well as expensive men as we must ask, pay, install and configure the hardware is expensive, long before we need it. However, the use of cloud computing, we only pay for the amount we use and when to use the power of computing. In this way, the cloud is economical.

Reliability - A cloud computing platform provides an additional, reliable and consistent managed service from an internal IT infrastructure. Guarantees 24x7 and 365 days of service. If a server fails, hosted applications and services will be easily moved to one of the servers.

Unlimited storage - Cloud computing offers virtually unlimited storage capacity, which means you do not have to worry about the lack of storage space or the increased availability of storage now. We can access as much as we need.

Backup and recovery - store data in the cloud, so make them and restore them relatively easily to avoid getting physical tools. Cloud service providers also have enough technology to retrieve data, so there is the convenience of retrieving data when.

Easy access to information - Once you register in the cloud, you can access your account from anywhere in the world, provided there is an Internet connection at the point. There is a wide variety of storage and security facilities that vary with the type of account chosen.

Disadvantages of Cloud Computing

While cloud computing offers a number of wonderful advantages, it also has some drawbacks that often raise questions about efficiency.

Security issues

Security is an important issue in cloud computing. Cloud service providers to implement the best security standards and certifications in the industry, however, to save important data and files to an external service provider always carries a risk.

AWS's cloud infrastructure is designed to be the most flexible and secure cloud network. It provides a scalable platform and it is believed that customers needed to deploy applications and data quickly and securely.

technical issues

As service providers offer cloud services to the customer every day, sometimes the system may have some serious problems that lead to business processes, even though they are suspended. Also, if the Internet connection is disconnected, you will not be able to access any of the applications, servers, or data in the cloud.