Generally, when we say cloud or cloud computing we mean a network of servers which are the collection of virtual machines that can be accessed through the internet. And the software and database which are the part of the cloud run on that server sometime also referred to as cloud server technologies. Apparently, there are many players in the cloud market and every cloud server is located on the data centers across the world. The cloud technologies have changed the framework of the internet completely, now every user and company do not need any separate virtual and physical resources to manage their software and data on the server, the cloud vendor manages all that and more for you.
What is Cloud?
Data accessibility is one of the main features of the cloud, now a user can access the same file and application using any device from any part of the world via the internet. The cloud helps you to store your data, and save it on the server in a data center. So, no matter whether you are login to your Facebook or Gmail through mobile or desktop, all the data will be shown on both the devices. All cloud services such as Google Drive, Dropbox, AWS, etc work on the same concept.
There are many other benefits of using cloud services now many IT companies have been switched to the cloud computing and now they do not need to update and maintain their server by their own, the cloud service vendor will manage and update the server, this helps to reduce the cost of extra IT maintenance and other physical resources. For small business cloud computing is the best option, at an affordable price they can have the best services.
How does Cloud Work?
In the definition of cloud, we have mentioned that a cloud is a collection of virtual machines and the complete mechanism of cloud works on the technology called virtualization. The virtualization helps in the creation of simulated and digital virtual machines, which act as if they were a physical computer with hardware.
So, what is a Virtual Machine?
A Virtual Machine (VM) exists only as a code, in short, it is a program or software designed computer that can run on the top on a specialized operating system called a hypervisor.
A hypervisor act as an interface between the virtual machine and the real physical system.
In short, if we define a virtual machine “A VM is a written code which can be a CPU, Disk memory or even connect to the internet, and the cloud server is full of virtual machines which mean most of the work on the cloud is handled by software known as Virtual Machines”
A virtual machine makes the use of hardware more effective and by running the virtual machine on a server, the server itself becomes multiple servers because the virtual machine can act as a CPU or Memory Device. There are many advantages of running several virtual machines on the server If one of the virtual machines gets collapsed the others will manage and handle the data for you.
Model of Cloud Computing
There are three major services offered by cloud computing and these three services are delivered on the basis of Cloud Models.
- SaaS (Software-as-a-Service)
In this service, we get the on-demand software, and all the web-application we use on our web browser fall under this service. In SaaS we do not need to install the complete software, instead, we use the internet and browser to interact with the application we require, all the google suite applications are the examples of SaaS.
It is mainly a Development Environment Service, which comprises of programming languages compiler or interpreter environment, Operating System, and Database. Using this model, developers can execute their program or code on the cloud service without worrying about the cloud infrastructure. In this model we can only manage our Application resources, this model is used by developers and AWS, Heroku, Google App Engine, etc. are the examples of PaaS Model.
This model of Cloud offers Computer Architecture and Infrastructure, which mean it offers the complete resource package in a Virtual Environment, and it includes Data Storage, Virtual machines and Server & Networking.
IaaS used by SysAdmin and this service is provided by AWS(Amazon Web Services)EC2, Go Grid, etc.
Types of Cloud Deployment
On the basis of Cloud models, there are different types of cloud deployment, and the type of cloud deployment decide where will be the cloud server and who will manage it?
Cloud Deployment Types:
- Private Cloud
- Public Cloud
- Hybrid Cloud
1. Private Cloud
In the private cloud, the company buys a separate complete server where they do not have to share the resources with others.
2. Public Cloud
It is the most commonly used cloud deployment, in this many organizations share the same cloud server as well as all the resources.
3. Hybrid Cloud
It is a combination of Private and Public cloud, an organization can use public and private cloud simultaneously, they can use a private cloud for primary reasons and public cloud for backup.
In Multi-Cloud deployment we have multiple private or public clouds working for the same organizations. Multi-cloud deployment can also be a hybrid cloud and Vice Versa.
Why it is called Cloud?
The Cloud comes as a slang word to the IT industry, the term cloud generally represents that we have a number of virtual machines and they are operating at different locations across the world and every server with several virtual machines are connected through internet. This web of server and virtual machines spread around the globe name this technology Cloud, and somehow its definition is similar to the internet that’s why it is also known Mini Internet.
What are Containers?
A container is a standard unit of software that package up code and all of its dependencies. Containers are also part of cloud Virtualization technology and based on the PaaS model of cloud.
Cloud is a collection of multiple servers and virtual machines more and less the cloud is the part of the software group and it also involves Hardware systems at the data center. Now, most of the things on the internet use cloud computing because it is effective and reliable. Cloud provides many services and for big and small organizations cloud is the ultimate best choice.