What Is Cloud Computing? | Types Of Cloud Computing | Telehouse
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Cloud computing is a data storage, processing and access technology. It allows remotely stored and/or processed data to be accessed over an internet connection. With growing popularity and the promise of profound technological advancements, cloud computing remains a favoured way of managing and accessing data for businesses and society at large.

Nevertheless, confusion remains. You’re not alone if you’re looking for answers to questions such as: What precisely is cloud computing? How does cloud computing work in detail? How can computing services residing in various data centres be easily accessed as if they were close-at-hand?
Ubiquity and proximity are essentially what define cloud computing in contrast to traditional hosting. Customers of cloud computing services outsource all or part of their data storage and computational needs to a cloud service provider, which makes the data needed easily accessible over an internet connection at any time and place. Recently, steep increases in the amount of data storage and processing needed to run some businesses effectively has made managing this data exclusively on-site (on-premise) far less practical. This in turn, has made the prospect of outsourcing the problem to a cloud service provider attractive.

Types of cloud computing services

Three of the most common types of cloud computing services are Software as a Service (SaaS), Infrastructure as a Service (IaaS) and Platform as a Service (PaaS). A sound understanding of the differences between these is essential to any business aspiring to adopt this often more flexible and scalable way of working.
Software as a Service (Saas) provides software applications on-demand. It’s one of the most widely used methods of cloud computing as it is relatively easy to use and offers great flexibility. It circumvents the need to install software onto a user’s computer, and shifts the responsibility for hosting, handling maintenance updates and fixing security vulnerabilities from the user to a cloud service provider such as Amazon Web Services (AWS) and Microsoft Azure
Infrastructure as a Service (IaaS) is generally considered the most basic type of cloud computing. IaaS provides IT infrastructure, which can also be referred to as virtualized hardware. Usual IaaS offerings include: servers, virtual machines (VMs), storage, networks, and operating systems. IaaS is often recommended for batch-orientated businesses that need scalable solutions to get results quickly.
Platform as a Service (PaaS) often referred to as a dream-come-true for many innovative developers, facilitates the development and distribution of applications, websites and other services in a cloud environment. Similar, to IaaS it grants access to computing infrastructure, but on top of that, customers can use high-level programming tools for building, maintaining and testing their new Internet services. Heroku and Force.com are well-known examples of PaaS.

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What is a private cloud?


Itis common practice for businesses that rely on systems dedicated and customised to their very specific needs, to create their own internal data centres also known as private clouds, which the public cannot access. However, such solutions are believed to be largely adopted by large companies and organisations that can afford to build and maintain their own private cloud-supporting hardware on premise.

What are some economic considerations around cloud computing?


Flexible cloud computing solutions are particularly popular among small, medium, and rapidly growing businesses that are mindful of their budget. These businesses are aware that their data operations might need to scale up or down quickly depending on the demand for their services which is often unpredictable. Therefore, when choosing a cloud service provider, their main concern is the flexibility available to increase or decrease the resource as needed by the company.  
For example, online start-ups often have no way of predicting how popular and data resource intensive their online service is going to become. Businesses like this are wary of paying upfront for fixed data resources they may not use. Alternatively, if their online service becomes an overnight success with a large amount of business acquired in a short period, the data resource requirements could exceed the limits of a fixed plan or system, necessitating further expense to upgrade. This makes flexible cloud computing plans particularly attractive to businesses of this type.

What are on-demand cloud services? 


Most cloud computing providers deliver on-demand services that can be rented with a pay-as-you-go model, which implies that more computing resources can be easily made available to customers within minutes. This, of course, eliminates the burden of capacity planning, especially when the demand is unknown in advance, which is a common predicament for many start-ups. Moreover, most of the main cloud computing vendors provide advanced and efficient computing solutions that reduce network latency for both websites and applications significantly.
The general trend that many organisations are currently following, and is likely to continue for the foreseeable future, is to manage their cloud-based solutions via a data centre provider. This approach means that maintenance is outsourced and adding additional storage space is easier.
At Telehouse we pride ourselves on having some of the most advanced data centres in Europe. Our London data centres offer industry leading colocation facilities, in particular the North Two data centre located in the London Docklands Campus which provides unrivalled connectivity and high density power solutions.
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