The digital transformation of companies is increasingly forcing CIOs to turn to hosted infrastructures and services. The majority begins this mutation by choosing a public cloud hosting.
This evolution requires a technical evolution. Cloud Computing is not ''a new technology, but a new way of delivering computing resources,'' says the National Institutes of Standards and Technology (NIST), which is a reference in this area.
What is a Public Cloud?
Accessible to a large public in the form of pooling resources, these services rely on a shared infrastructure (server, storage and network) and a processing power that the companies that use them do not own themselves. Hence the need to use specialized suppliers.
This sector is experiencing strong growth. In its report on the global market for cloud services, Gartner estimated that in 2016 the volume generated by cloud computing will reach $ 208 billion, an annual increase of 17%. The main locomotive is the public cloud.
It presents many factors that encourage companies to adopt it to succeed in their digital transformation.
The benefits of the Public Cloud
The simplicity
A company can easily create its ''instances'' in minutes, for example, having a preloaded ''virtual machine'' (OS and database software). This type of service reduces the complexity and implementation time required for testing and deploying new applications.
Proposed by specialized providers, they are easily accessible via the Internet via a public IP address and a secure network. Customers also do not care about the maintenance of the system unlike the Private Cloud.
Cost reduction
the public cloud helps reduce costs
According to Sig Nag, Research Director at Gartner, companies realize 14% savings on their budget by adopting this type of accommodation.
Unlike the Private Cloud, companies do not need to buy physical hardware because the servers are virtual and hosted by a third party. The resources being shared, they can consume them ''As A Service''.
The payment of the service is usually monthly or annual and according to the usage (''pay-as-you-go''). Businesses can customize their service by choosing the number of users and applications they can access.
A more agile and agile IS
Public hosting makes it easy to adapt to peak loads. Depending on its needs, the client can add or delete resources (processor, memory, disk, etc ...) or adjust the number of instances as needed. This allows more freedom for development teams to manage test resources
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The public cloud adapts to the needs of the company
The information system is no longer fixed for 3 years but it follows the growth of the company. The graph above illustrates the adaptation of computing and storage resources to the needs of the company, this adaptation makes it possible to limit the waste of resources and to avoid a shortage of IT resources.
The limits of this Cloud
Computer security
Public cloud security
The protection and privacy of data hosted by cloud providers remain the top two business concerns.
Still, Gartner says, ''Public cloud services offered by leading vendors are secure. The real difficulty is to use them in a secure way.
This nuance is essential: companies must indeed adopt good practices (encryption of information, access management ...) in terms of cybersecurity.
A use that can become expensive
The pay-as-you-go mode is convenient, but it can be expensive if it is not mastered internally. Left in self-service without cost control, it can be exorbitant. Discover the advice of Benjamin Denoose (Financial Director) to control his expenses .
The recovery of the existing
In the case of using instances or virtual machines, this type of hosting is not suitable for all environments, including existing systems, for several reasons:
Some applications do not support virtualization and need to be on dedicated physical servers.
Problems of Software Licenses: Some licenses are not reusable. The company must then buy licenses or migrate to a new version.
The need to master the performance: Some applications can be very resource intensive and need to have performance that can only be guaranteed by dedicated servers by kloud.pk/
In this context, the Private Cloud can address these issues. The differences between Private Cloud and Public Cloud allow the company to meet 100% of their needs by combining the two solutions. It's called the Hybrid Cloud .
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