The Present and Future of Cloud Service (2)
In the first installment of this series, we have discussed the current state and future prospects of cloud. We also took a look into the most recent trends in the cloud market while introducing LG CNS VDI(Virtual Desktop Infrastructure).
Today, we will discuss customizable cloud, ‘Private Cloud’.
The Cloud ‘Service’ Model and ‘Deployment’ Model
Where do the terms ‘Private Cloud’, ‘Public Cloud’, ‘Hybrid Cloud’, and ‘Community Cloud’ come from? These terms were primarily quoted by the US ‘NIST (National Institute of Standards and Technology)’ in 2010.
The NIST categorizes a cloud service model into the following 3 types: IaaS (Infrastructure as a Service, PaaS (Platform as a Service) and SaaS (Software as a Service). Also, NIST categorizes a deployment model into the 4 model types: private, public, hybrid and community.
The 5 characteristics of cloud services are 1) User-centered service 2) Broad network access 3) Rapid elasticity 4) Measured service and 5) Shared computing resources. We will now take a more detailed look into the cloud services based on the NIST definition.
- Cloud Service Models: IaaS, PaaS, SaaS
First, we must understand how models are categorized as ‘X as a Service’ according to the type of service that is offered. Since the NIST definition was released, various service types have appeared for different venders and research firms.
There are service models such as ‘Backup as a Service’ which offers backup system as cloud, ‘DR (Disaster Recovery) as a Service’ and ‘Desktop as a Service’ which offers VDI (Virtual Desktop Infrastructure) that are continuing to be diversified and upgraded.
- Cloud Deployment Models: Private, Community, Public, Hybrid
There are different types of cloud deployment models that are categorized according to what sort of distribution methods are used for deployment.
For example, let’s assume that an individual has an office. In this case, private cloud is implemented where ‘the cloud infrastructure is provisioned for exclusive use by a single organization comprising multiple consumers (e.g., business units). It may be owned, managed, and operated by the organization, a third party, or some combination of them, and it may exist on or off premises.’
On the other hand, when setting the foundation for creating a mobile game, public cloud can be implemented in order to obtain infrastructure resources for ‘using cloud to secure immediate fusibility if in cases where urgent development is necessary but it is difficult to purchase the required infrastructure.’
In this way, the deployment model category structure changes according to how the system is used and who manages the resources from which location.
How and in Which Form Will Cloud Advance?
While many people may have noticed the current state of cloud as it has been described above, most mid-sized enterprises are currently evolving to implement private cloud.
The diagram above is a private cloud roadmap released by the global IT market research organization, Gartner. Most Korean cloud services are operating at ‘stage 2’, ‘distributed virtualization’. Multiple servers in various locations are established in a virtualized distribution environment with automated high availability, which makes it possible to minimize downtime.
Gartner states that companies with distributed virtualization will be developed as private cloud systems, and this will be in the form of hybrid cloud in preparation for the need of an additional larger scale infrastructure environment, if there is a sudden unforeseen growth in business. It also describes that according to the economic efficiency and technological advancement of public cloud, ultimately the system could be converted to public cloud.
Thus, private cloud is currently being used in enterprise environments. So, how should companies transform their IT environment to cloud?
Migration to Private Cloud!
Most people reading this article may have some experience working with virtual environments such as VMware, Xenserver or Hyper-V. But are cloud and virtualization similar concepts?
Even up until last year, we received many requests to do a comparison of Hypervisor virtualization and the Openstack cloud platform. There is still little known about the cloud architecture or technological environment. So, LG CNS has defined the infrastructure service sector with through the stack shown below. Virtualization can be considered as one of the technological elements that make up cloud.
‘Smart Cloud Block’ by LG CNS, it is defined as stack structure of service and solution for customers to convert to private cloud.
For rapid service response, which is most important in a private cloud environment, it needs to convert from the traditional ‘scale-up’ system (capacity upgrade for purchase of large-scale equipment) to a ‘scale-out’ system (capacity upgrade for the increase of multiple small-scale devices). At this point, conversion from large-scale Unix equipment to a small-scale x86 server such as Linux is an absolute must.
Also network and storage domains need to adopt a software solution in the rapid evolution in order to guarantee conversion of the architecture that will allow continued expansion.
Finally, active adoption of OSS (Open Source Software) in order to reduce costs is also necessary. Until now, there was the misconception on OSS that more expenses were needed in order to manage the difficult tasks of guaranteeing technology and providing maintenance. If this issue can be resolved, it should likely be given first priority.
We have now taken a look into what private cloud is and discussed what LG CNS proposes for private cloud. Private cloud is not simply a virtualized hosting service but a total IT service.
These days there are an increasing number of companies that are fearlessly seeking out launching new business ideas. It is clear that technologies such as U2L (Unix to Linux) conversion, OSS conversion, virtualization introduction, software based data centers and operational/management automation must be extensively examined. LG CNS private cloud is the wise choice when searching for a cloud solution.
Next time, in part 3 of this series, we will discuss VDI and Mobile PC (vmCube) for security and operational stability.
Written by Gaehoon Chang, Senior, LG CNS Cloud Business Group