This is Part 10 of cloud computing tutorial. There are different types of clouds - Private,
Public and Hybrid. In our previous three videos, we discussed what these different clouds are,
their benefits, limitations and use cases. In this video, we'll compare them side by side. First
let's talk about cloud hardware. As far as the private cloud is concerned
the entire cloud infrastructure, that is the physical servers, storage, networking etc
must be procured by the organization that owns the private cloud. When it comes to the public cloud,
the public cloud service provider like Amazon or Microsoft provides the infrastructure.
Now, remember a hybrid cloud is not a different cloud altogether. It's just that both the clouds,
that is private and public clouds work together to meet the organization needs.
So, for the private cloud your organization must provide the infrastructure whereas the public
service provider provides the infrastructure for the public cloud. Tenancy. A private cloud
is usually used by a single organization i.e single tenancy. A public cloud is used by
multiple organizations i.e multi-tenancy. The private part of the hybrid cloud is used by a
single organization whereas the public part of the hybrid cloud is used by multiple organizations.
Data center location. Inside the organization's corporate network. Anywhere on the internet.
Public cloud like AWS and Azure data centers for example are typically located in many countries
across the entire world. The private cloud data center is typically inside the organization's
corporate network and the public cloud data center could be anywhere on the internet. Scalability.
Private cloud scalability is limited by the amount of infrastructure. Beyond certain point
it is impossible to scale up, unless the organization procures additional hardware
and set it up. We never run out of resources in a public cloud. It provides near unlimited
scalability. The scalability of the private cloud services and resources is limited by
the underlying available infrastructure whereas with the public cloud services we do not have
such a limitation. Cloud Maintenance. The organization itself is responsible
for setting up and maintaining the private cloud. The cloud service provider is responsible
for setting up and maintaining the public cloud. Organizations and even general public
can use the public cloud services by just paying a monthly fee. The private cloud is managed by
the organization that owns it whereas the public cloud is managed by the cloud service provider.
Costs. Private cloud involves huge initial capital expenditure as the organization must purchase all
the cloud hardware, set it up and maintain there thereon. To maintain the private cloud
the organization needs to hire workforce. So, there is monthly operating expenditure as well.
With the public cloud there is no initial capital expenditure but you pay a monthly
fee for the public cloud services you use. The more you use these services the more you
have to pay. The overall price tag may be higher than what you anticipated especially if you use
lot of public cloud services for a long time. With the private cloud, the organization is faced
with both the initial capital expenditure as well as monthly operating expenses to maintain it.
With the public cloud you pay a monthly fee for the services and resources you use. Finally,
Accessibility. Only the organization that owns the private cloud can access private cloud resources
and services. A public cloud is exposed to the public so anyone can access its resources and
services. Private cloud services can be accessed only by the organization that owns it whereas
public cloud services can be accessed by anyone. That's it in this video. Thank you for listening.