In 2006, Amazon Web Services (AWS) started to provide IT services to the market in the form of web services, which is currently known as cloud computing. With this cloud, we need not plan for servers and other IT infrastructure which takes up much of time in advance. Instead, these services can instantly spin up hundreds or thousands of servers in minutes and deliver results faster and smoother. We pay only for what we use with no up-front expenses and no long-term commitments, which makes AWS cost efficient.
Today, AWS provides a highly reliable, scalable, low-cost infrastructure platform in the cloud that powers multitude of businesses in around 190 countries around the world.
Cloud computing is an internet-based computing service in which large groups of remote servers are networked to permit centralized data storage, and online access to computer services or resources.
Using cloud computing, organizations can use shared computing and storage resources rather than building, operating, and improving infrastructure on their own.
Cloud computing is a model that enables features as given below.
Users can provision and release resources on-demand.
Resources can be scaled up or down automatically, as per load.
Resources are accessible over a network with proper maintained security.
Cloud service providers can enable a pay-as-you-go model, where clients are charged based on the type of resources and per usage.
There are three types of clouds − Public, Private, and Hybrid cloud.
In public cloud, the third-party service providers make resources and services available to their clients via Internet. client’s data and related security is with the service providers’ owned infrastructure.
A private cloud also offers almost similar features as public cloud, but the data and services are managed by the organization or by the third party only for the client’s organization. In this type of cloud, major control is over the infrastructure so security related issues are minimized.
A hybrid cloud is the combination of both private and public cloud. The decision to run on private or public cloud usually depends on different parameters like sensitivity of data and applications, industry certifications and required standards, regulations, etc.
There are three types of service models in cloud − IaaS, PaaS, and SaaS.
IaaS stands for Infrastructure as a Service. It offers users with the capability to provision processing, storage, and network connectivity on demand. Using this service model, the clients can develop their own applications on these resources.
PaaS stands for Platform as a Service. Here, the service provider provides various services like databases, queues, workflow engines, e-mails, etc. to their clients. The client can then use these components for building their own applications. The services, availability of resources and data backup are handled by the service provider that assists the customers to focus more on their application's functionality.
SaaS stands for Software as a Service. As the name suggests, here the third-party providers provide end-user applications to their clients with some administrative capability at the application level, such as the ability to create and manage their users. Also some level of customizability is possible such as the clients can use their own corporate logos, colors, etc.
Here is a list of some of the most significant advantages that Cloud Computing has to offer −
Cost-Efficient − Building our own servers and tools is time-consuming as well as expensive as we need to order, pay for, install, and configure expensive hardware, long before we need it. However, using cloud computing, we only pay for the amount we use and when we use the computing resources. In this way, cloud computing is cost efficient.
Reliability − A cloud computing platform offers much more managed, reliable and consistent service than an in-house IT infrastructure. It guarantees 24x7 and 365 days of service. If any of the server fails, then hosted applications and services can easily be transited to any of the available servers.
Unlimited Storage − Cloud computing offers almost unlimited storage capacity, i.e., we need not worry about running out of storage space or increasing our current storage space availability. We can access as much or as little as we need.
Backup & Recovery − Storing data in the cloud, backing it up and restoring the same is relatively easier than storing it on a physical device. The cloud service providers also have enough technology to recover our data, so there is the convenience of recovering our data anytime.
Easy Access to Information − Once you register yourself in cloud, you can access your account from anywhere in the universe provided there is internet connection at that point. There are different storage and security facilities that vary with the account type chosen.
Although Cloud Computing offers a wonderful set of advantages, it has some drawbacks as well that often raise questions about its efficiency.
Security is the great issue in cloud computing. The cloud service providers implement the best security standards and industry certifications, however, storing data and significant files on external service providers always bears a risk.
AWS cloud infrastructure is designed to be the most flexible and secured cloud network. It offers scalable and highly reliable platform that enables clients to deploy applications and data quickly and securely.
As cloud service providers offer services to number of clients each day, sometimes the system can have some serious problems leading to business processes temporarily being suspended. Additionally, if the internet connection is offline then we will not be able to access any of the applications, server, or data from the cloud.
Cloud service providers promises vendors that the cloud will be flexible to use and integrate, however switching cloud services is not easy. Most organizations may find it difficult to host and integrate current cloud applications on another platform. Interoperability and support issues may arise such as applications developed on Linux platform may not work properly on Microsoft Development Framework (.Net).