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Data Center Server Virtualization In Cloud Hosting Environment

By Author: John Ward
Total Articles: 34

Server virtualization is the shielding of server resources along with the identity and number of individual physical servers, operating systems and processors from

server users. The server administrator uses an application to divide one physical server into multiple private virtual environments. These virtual environments are

called virtual private servers.

Three approaches to server virtualization

* The virtual machine model: Virtual machines are mainly based on the host criterion.

* Each host runs on a virtual imitation of the hardware layer.

* This approach allows the guest operating system (OS) to operate without modifications.

* It also confesses the administrator to create guests that work with different operating systems.

* The guest has no understanding of the host's OS because it is not known that the OS is not running on real hardware.

* However, it does require some real computing resources from the host - so it uses a hypervisor to coordinate instructions to the CPU.

* The hypervisor which is also called as virtual machine monitor (VMM) is a program that allows various operating systems to share a single hardware


* It also helps to validate all the guest-issued CPU instructions and handles any executed code that demands additional allowances.

* The para virtual machine model: It is a model based on the guest/ host criterion and it uses a virtual machine monitor too.

* In this approach, the VMM actually alters the host operating system's code. This alteration is called porting.

* Porting endures the VMM so that it can make use of the privileged system calls easily.

* Like virtual machines, the para-virtual machines are competent of running multiple operating systems.

* Virtualization at the operating system (OS) layer: This approach works differently and is not based on the guest/ host paradigm.

* In this model, the guest runs a single OS kernel as its core and conveys the operating system functionality to each of the guests.

* Guests must use the same OS as the host although different distributions of the same system are allowed.

* This assigned architecture removes system calls between layers, which helps to reduce CPU usage overhead.

* It also needs each partition to be rigidly isolated from its neighbors, so that a security breach or a failure in one partition will not affect any of the other


* In this approach, common libraries on the same physical machine will be shared, thus allowing an OS level virtual server to host many guests at the same


* Important considerations while building a data center for cloud hosting

* Performance: Any web hosting business prospers up or dies a sudden death based on the performance levels.

* Hence, in order to gain integrity in the market, you must maintain optimum performance levels.

* Also, you should ensure that there aren't any compelling lags when users try to carry out tasks that necessitate extensive resources.

* One may also wish to consider using a traffic accelerator for aiding you to accelerate date center-to-cloud resources.

* It's always important to find out how much bandwidth your cloud vendor supplies, what their common suspension is and the consequences when your domain


Security: Security levels in cloud computing are more complex because you shouldn't admit other cloud customers to be able to access your private


* A cloud authentication service is one of the best pledges in such cases, as it helps to prevent the probability of other cloud sub-sites getting incensed when one

of them gets negotiated.

* Additionally, you should ensure that only the legitimate user is accessing the concerned resources in case if there are multiple clouds.

Data Center Server Virtualization: There are many techniques to monitor the data center performance and facilitate server management with the help of


* Furthermore, virtualization in data center can also help a great deal in catastrophe recovery planning.

* Interoperability of the cloud environment: It is important to ensure that your cloud hosting dealer sends out alerts for fidelity and risk.

* If you can organize monitoring and management systems then there would be nominal difference between the internal IT infrastructure set-up and the cloud

environment. This helps to assure high levels of inter-operability in the longer run.

* Summon up that the cloud hosting dealers will never bother to manage the data center resources.

* So, it'll always be up to you to assure the rapport of resources with those provided by cloud and keep them handy to your users all the time.

There's an utter lot of resilience with the cloud environment, so one must try to develop the most tenable business model while building data centers for cloud

hosting, by considering the above mentioned aspects.

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