Private Cloud is a managed service with no PaaS or IaaS involved. A Private Cloud is a full cloud with a single tenant. There is no need to purchase additional hardware and software, and that is why you can quickly expand your Cloud Stack.
Private Cloud or Datacenter Cloud is a Cloud computing model that is in operation in a private data center of a business organization or a public data center of government agencies. Private Cloud is designed for business entities in which the centralized management of the application is performed centrally by the enterprise.
Public Cloud is a cloud computing model in operation in an Internet-wide (internets) infrastructure shared and managed by many entities and organizations. Public Cloud works in a transparent fashion by which the applications and data are stored and managed by third parties. Third parties manage the data center where data is stored, and the client does not control its operation.
For Cloud deployments that do not have a single tenant but are still in a Public Cloud, you should have the ability to provide a Public Cloud interface to the Private Cloud so that you can provision resources and applications with ease.
On that note, when I talk about your Private Cloud, I am talking about the facility where you can create a self-service application environment. I should also clarify that I am not talking about a configuration of Windows Server with an embedded PaaS application. In a Private Cloud, that is where you go and select an application and create it within that environment. In a Private Cloud, you do not have to worry about whether the application is deployed on physical servers, virtual servers, or a combination of the two.
In terms of infrastructure, it is pretty much the same as with a Public Cloud; however, there are still a few differences that you should know.
The Main Differences
Firstly, with a Private Cloud, you can only provision a single tenant workload within the Private Cloud. So, you cannot have one person running their virtual machines, another person running their workloads, and so on. As I mentioned earlier, there is also no need for a PaaS/IaaS. You can provision hardware and software in a Private Cloud, but you cannot dynamically create Virtual Machines or applications within that environment.
On top of that, there are different Private Cloud variations, such as Private Dedicated Hosting, which means that the workload actually resides on the physical server, and you do not need the same level of control over the hardware. This configuration allows you to do whatever you want with the hardware.
In terms of storage, there are still some differences that you should know. Again, there is no PaaS or IaaS as you can use Storage as a Service for that purpose. However, on the other hand, you do not have to pay for storage per user. You do have to understand that when you run your workloads on a Private Cloud, you still pay for the storage for the workloads. That means that you will not need to pay for an additional SAN/NAS or File Server. The storage is managed within the private Cloud, so you do not have to worry about the storage anymore.
That is basically all you need to know about Private Cloud.
Now we come back to the question, “What is a Public Cloud”? A Public Cloud is a managed service that allows multiple organizations to install, provision, and scale applications with greater ease than previously possible.
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Organizations can host applications and run those applications on virtual machines or host the servers and the resources within the Public Cloud without having to purchase those resources and then manage them. When you deploy an application or a workload within the Public Cloud, you do not need to worry about provisioning those resources or managing those resources.
When you deploy an application or a workload in the Public Cloud, you only pay for the resources you use. You pay for the processor power, the storage, the network, etc. You pay for the resources you use.
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