INSUBCONTINENT EXCLUSIVE:
Cloud computing drives an increasing variety of online services, including popular SaaS (Software as a Service) offerings
In order to enable cloud computing, programs and data need to be taken off the local PC or mobile platform, and instead stored in this
nebulous cloud, on a server in a location remote from the device accessing the resource.Delving deeper, there are three main types of clouds
in cloud computing: public, private and hybrid
A public cloud provides cloud services to the public, whether to you personally, or to your organization, with the resources shared by many
As they typically support multiple customers, they are considered less secure, and therefore less suited to sensitive information, such as
confidential medical data for example.The resources are accessed over the internet, which becomes a requirement for use, so mission critical
applications that cannot tolerate any internet connectivity downtime should not be put onto the public cloud.Public cloud solutions are
available from the major tech behemoths, including Amazon Web Services, Google Cloud Platform and Microsoft Azure.Private cloudAt the other
end of the spectrum is a private cloud solution
In this model, the shared computer resources are dedicated to one organization
An immediate advantage is that there can be much tighter security to limit access, making this well suited for more sensitive data that can
comply with industry standard and security regulations which are imposed on such industries as the financial, medical or legal sectors (or
any data that needs to remain classified).For a private cloud solution, the server can be on the company premises, known as a local server,
or off premises, designated as a remote server
The resources on the server can be either owned directly by the company, or contracted via a vendor who sets up the software on the company
and private cloud solution
It can be thought of as connecting a public cloud to an in-house data center.While some folks often think of a hybrid cloud as a mix of the
cloud arrangement are distinct and independent elements
brings its own set of pros and cons
The downside of a hybrid cloud is that it is a more complex undertaking with a blend of resources across multiple platforms, and that
requires a higher level of knowledge to manage and support it.Another drawback of a hybrid cloud is that the cost is frequently higher than
a public or private cloud setup as there are both the hardware costs of the private cloud, and the ongoing subscription fees of the public
There are also security issues as the public portion of the hybrid cloud still has the multiple user security issues of a pure public cloud
solution.There can also be latency concerns as data is shuffled between the private and public portions of the cloud
Attention must also be paid to the data center that supports the private cloud portion of the hybrid cloud, with appropriate choice of
hardware in terms of the servers, storage, the network connecting everything, and load balancers for traffic management to keep it all
running smoothly.However, the big upside is that a hybrid solution offers more choice in available resources, with the ability to use the
best of each of the other solutions
It also offers a higher degree of scalability, with the potential to share resources as needed
Finally, the public cloud component facilitates easier access for mobile and remote workers with a hybrid cloud solution, compared to a
depends on a virtualization layer, also known as a hypervisor
This virtualization layer supports the virtual machines (VMs) that access the resources on the hybrid cloud.Installed on top of the
virtualization layer is another layer, called the cloud software layer
This higher layer provides the cloud capabilities to users
Due to the complexity of setting all this up, the services of a private cloud architect are employed.For example, a common challenge is the
choice of a virtualization layer, and the cloud software layer to provide the proper compatibility to the target public cloud service
This will allow the desired services to migrate smoothly between the private cloud and the public cloud element, into the larger hybrid
This will in turn allow developers to create a service that draws on resources from both the public and private cloud components.A hybrid
cloud is particularly well-suited to a dynamic workload situation
In situations of peak demand, for example, during a busy time at a company when the need exceeds 100% of the resources of the private cloud,
the overflow traffic can be directed to the public cloud portion
This ensures that things run smoothly without any interruption in availability.It is also cost-effective as the business only pays for the
extra resources of the public cloud for the limited time that it is required, rather than paying to build out a more robust private cloud
all year round, which is only used for a relatively small portion of time
