A combination of different services such as software, infrastructure, and platform that involve in the process of delivering hosted service over the internet is called cloud computing. This name is inspired by a cloud symbol, used to represent in flowchart and diagram.
It has four characteristics that make it different from traditional web hosting.
• It depends on you, how much you need and it is sold, what you demand.
• At any given time, how much service a user can use.
• The service of cloud computing is managed by a provider.
• You can log in to the network from any part of the world.
Top Benefits of Cloud Computing:
There are many benefits of cloud computing such as more innovation, faster services, and flexible resources. There are some reasons; organizations are shifting towards cloud services:
• It eliminates the cost of purchasing hardware and software and hiring staff for running a data center.
• There is no need for planning but it just a click away from you and you can get the resources that you demand.
• Cloud computing is very productive, there is no investment required for your separate set up of hardware and software and staff hiring. So IT teams can obtain high performance through cloud computing.
• The efficiency and performance of cloud computing are up to date because hardware and software are updated to the latest generation while single datacenter organization requires more money to invest for updating their setup to the latest generation.
• Many cloud computing companies provide you the latest technologies, policies, and controls that secure data, app, and infrastructure from any possible threat.
Types of Cloud Computing:
Cloud computing is classified in two ways, based on the deployment model and the services the cloud computing offer.
Cloud computing can be classified on the deployment model as:
Based on services, cloud computing is classified as:
1. PaaS (Platform as a Service)
2. IaaS (Infrastructure as a Service)
3. SaaS (Software as a Service)
4. Database, Storage, Management, Application, Testing as Service.
Public Cloud Computing:
It is a separate company which provides all the service such as Virtual Machine, applications, Storage, which is available for the general public over the internet and these services are either free or you have to pay for it as a per-usage model.
Benefits of Public Cloud Computing:
• It reduces the cost for an organization to invest in IT resources and build their own data-center.
• It provides scalability for a user to satisfy their demand for resources and services.
• Customers will pay for those resources which they use.
Public Cloud Architecture:
It provides a virtual environment and multi-tenant architecture in which users share computing resources but the data of each user is separate from each other. The public cloud is highly depending on its performance, speed, and high bandwidth so that the data transmission is high. They use multiple data center and replication of data makes it more resilient.
Private Cloud Computing:
Private cloud is the same as public cloud computing but here private cloud computing provides services to a single organization. It is best for those businesses which have an unpredictable need for computing resources. It is specially designed for the need of a single organization, so the organization has full control over the resources and little chance of threat from outside.
When an organization built private cloud then the resources and benefits of a private cloud are the same as public clouds like scalability, user self-service, and configuration of virtual machine and optimization of computing resources on demand. When the public cloud can’t fulfill the needs of an organization due to the workload then the organization prefer to go toward private cloud computing, so the organization take full benefits of the resources of cloud computing and has also full control on the resources.
As we discussed that private cloud computing has many advantages but there are also some disadvantages such as cost burden. There are technologies that required new IT staff to build the infrastructure of data centers. In public cloud computing, a user has to pay just for the resources they use while in private cloud computing the organization bears all the financial charges to build and maintaining the structure of the resources whether they use or not.
Hybrid Cloud Computing
In this environment, the user uses both the platform; public cloud as well as a private cloud. User has more options, more data employment, and flexibility in hybrid cloud computing. An organization considers its workload to move between the public and private clouds.
Hybrid Cloud Architecture:
• Public cloud computing
• Private cloud computing
• Wide Area Connectivity between these two Platforms
A user will use resources of public cloud computing including storage, big data analytics clusters and some other services, but the user has no control over the public cloud computing, so he must architect his private cloud to attain compatibility with the public cloud. All this needs the implementation of hardware resources in the data center such as storage, servers, local area network (LAN) and load balancers.
An organization first deploy virtualization layer to create virtual machines then IT expert install a private cloud software layer on top of the virtualization layer to deliver cloud capabilities like self-service, reliability, resilience, and automation. The private layer will create a menu of services like database instances or compute instances.
A successful hybrid cloud depends on the compatibility of the virtualization layer, cloud software layers with the desired public cloud and this environment will enable an instance to move seamlessly between public and private clouds.
Benefits of Hybrid Cloud:
An organization gets the option to host more critical data in a private cloud and less critical data on the public cloud. It provides a more favorable environment for enterprises with highly changeable workloads. This environment is best for big data analysis like company keeps his sales record and data in his private cloud and run complex queries in the public cloud.
Types of Cloud Services:
Cloud computing becomes quickly famous for companies to access IT infrastructure and hence manage IT resources such as software resources and hardware resources provided by the third parties. Companies increase their IT capacities and functionalities through cloud computing without adding any software or setting up new infrastructure.
Infrastructure as a Service (IaaS):
It is the lowest level of a cloud solution and based on cloud computing infrastructure which acts as a fully outsourced service and provides his resources through a virtualized interface. Example of IaaS is web hosting which provides you hosting and development environment.
Benefits of using IaaS are given below;
• Access high grade IT resources with lower cost.
• Reduce capital expenditures.
• Users will pay for those services, which they use.
Users can scale and down the use of cloud resources based on their requirements.
Platform as a Service (PaaS):
This service is similar to IaaS but it is a little bit more advanced, it provides you a computing platform and solution stack in addition to infrastructure. The IT infrastructure includes a graphical user interface, programming languages and run-time system libraries. These services are specially designed for those companies who deploy cloud services for specific applications.
Benefits of using PaaS are given below;
• In a PaaS environment, many people are involved to develop cloud applications, which become a strong supportive community to help your IT team along the way.
• Companies will have no concerns about the upgrading of software, hardware or infrastructure, but the PaaS provides will handle all these upgrades, routine software maintenance.
• Major cuts in investment expenditure because companies will make no direct investment in software and hardware.
Software as a Service (SaaS):
It provides companies with functionally web-based applications and it includes email, project tracking, time management, CRM, ERP, etc.
Benefits of SaaS are given below:
• Quick scalability
• You can access it from anywhere using the internet.
• Services are of the custom level.