Public, Private or Hybrid Cloud – How to make the right choice?

Cloud computing is a booming industry and has significant economic benefits, including better efficacy of IT and computing needs scalability. Cloud computing concept has clearly shifted from buzz to business and in so doing, has transformed the nature of IT service delivery. Just look at the numbers, according to Gartner, the cloud software market reached $209.2 billion by 2016 and is projected to grow to total $246.88 billion, not to mention the billions of dollars that will be invested in infrastructure to support private and hybrid clouds.

Cloud Service Forecast Fartner

The three types of cloud – private, public and hybrid – are generally grouped under the banner of cloud computing, but they are actually different. Choosing the right cloud can be a challenge to outsource applications, data and services. For the organizations, the decision to use -private, public or hybrid- cloud depends on the services they use and their ability to integrate the chosen model.  But before moving their critical systems within the cloud, a question always comes up within the IT and management team, “What option do we have to opt for Public, Private or Hybrid Cloud?”

 

Each type of cloud has its advantages and disadvantages, which make it the best or the worst solution for a given company, situation or application. Similarly, each has an impact on application and network performance, which must be taken into account before implementation. So, let’s examine each type of cloud.

 

Public Cloud

In a public cloud, services and infrastructure are provided off-site, over the Internet. This means that companies are not looking for a very specific kind of infrastructure and can subscribe and start using storage, processing and other services immediately, via an online portal.

Therefore, the public cloud flexibility and ease-of-use, make it an ideal solution for companies that need to rapidly launch a service in the marketplace, have few regulatory constraints and use data that does not require a close integration with other parts of the company.

However, concerns remain about security, the protection of confidential information and the control of data in a public cloud. Another major problem is performance. Transferring services to a public cloud means accepting that business applications are run from anywhere in the world, regardless of where the service provider’s data center is located.

Most public cloud service providers do not indicate the location of their data center in their general terms and conditions, which gives them blank card to move workloads to reduce their operating costs. In short, the distance to be covered and the time needed to access applications can increase significantly for all users of the company. More surprisingly, these distances can change in an unpredictable way.

 

Advantages of Public cloud:
• It can be used instantly and accessible to all budgets.
• It is suitable for development and experimentation.
• The public cloud is perfectly “elastic” in order to adapt to the increasing needs of a company.

 

Limits of Public cloud:
• The public cloud, although flexible, is not necessarily adapted to all the needs of a company, not being tailored like the private cloud.
• The more you use the public cloud, the more expensive it is;

 

 

Private Cloud

With a private cloud, organizations own and operate internal IT services that host critical internal applications and data within the firewall. However, they can transfer workloads from one server to another in case of peak usage or when deploying new applications. It can be preferable solution for those organizations who have not embraced the public cloud as quickly for critical applications and data due to security requirements, integration issues, and concerns about availability. It can also be a very attractive proposition for companies in sensitive and highly regulated sectors, such as pharmaceutical or financial services. Similarly, many companies still prefer the private cloud for their critical data because it provides total control over data and applications. This eliminates concerns about data security and control, but it is more difficult to adapt to changing needs.

Private clouds also enable IT departments to better leverage their existing infrastructure. Typically, when deploying a private cloud, companies consolidate distributed computing resources and virtualize them in the data center. The IT department can manage them more cost-effectively while providing services faster.

However, it is a double-edged sword, because deploying a private cloud can put a strain on existing resources and work processes. When IT departments consolidate resources, applications and data generally move away from many users. Employees need to travel a longer distance on the WAN to get the information they need. The resulting latency can often radically reduce the performance and productivity of the enterprise.

 

Advantages of Private Cloud:
• It is tailored to your needs and your infrastructure
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Limits of Private cloud:
• This is a costly investment, and depreciation must be expected.
• The time required to adapt the size of the infrastructure to the needs of the company may be too long compared to the speed of the infrastructure.

 

Hybrid Cloud

In many cases, the hybrid cloud offers the best of both technologies. It becomes the norm because it allows companies to alternate between the two models depending on the conjuncture.

By splitting elements into a hybrid cloud, companies can keep every aspect of their business in the right environment. However, the merging of the public cloud and the private cloud poses an additional problem: the integration of services becomes more difficult because there is a loss of data consistency. This results in additional management, as well as potential differences in the interface, security, processing and reporting systems that need to be addressed.

As a composite architecture, the hybrid cloud has a dual implication, exposing networks to the potential impacts of deploying a public cloud and deploying a private cloud: applications delivered via a Public service are still likely to be located anywhere in the world, while private cloud applications are still consolidated in a small cluster of data centers, resulting in a potential blockage affecting network operation.

 

Advantages of Hybrid cloud:
• Each data item is naturally stored in the most appropriate Cloud environment.
• This solution combines the major advantages of the public cloud (flexibility, speed of implementation, development and experimentation) and those of the private cloud (security and total control of data).
Limits of the Hybrid cloud:
• This solution is however exposed to the disadvantages of the different types of Cloud and the risks during the deployment of each Cloud solution.
• The use of two different cloud types increases the management required

 

Accelerating cloud services

 

Whether a company choose a private, public cloud service or (most likely) hybrid cloud approach, WAN optimization allows it to take advantage of cloud computing offerings in terms of cost, economies of scale and ease of management while attaining the levels of performance and visibility needed to ensure the productivity of its staff.
Given the take-off speed of cloud computing, sooner or later, more companies will have to consider the benefits it can bring. Companies need to evaluate the cloud model that suits them best, but whatever model is chosen, a thorough understanding of the impact of each cloud service type on their IT infrastructure and topology is essential to ensure that it will result in no degradation of performance for users.

 

Do you have a Cloud project? Contact-us and we will support you to evolve your IT architecture by integrating a Cloud component.

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