Computer Systems Essay Example | Topics and Well Written Essays - 3000 words

Computer Systems - Essay Example The Midrange virtualization includes Solaris containers and zones and the commodity virtualization consists of VM ware, Oracle VM and Xen. The desktop virtualization is categorized in two PC / MAC and Virtual desktop infrastructure (VDI). The category named as PC / MAC includes virtual box, virtual PC etc. VDI consists of Oracle VDI and desktop virtualization by Citrix. The next category is the storage virtualization, which includes storage area networks and arrays developed by Exadata, Netapps etc. Lastly, there is a category named as network visualization consisting of Virtual Local Area Networks (VLAN). A single piece of hardware is divided into multiple instance by a technology is known as virtualization. The OS (operating system) along with hardware is similar even before virtualization. The division of hardware makes the resource transmission simple as, an operating system (OS) needs to utilize all resources that are available in a box. A single box with the help of resources c an host several instances or nodes. For example RAM I/O capacity i.e. permanent storage space, central processing unit and bandwidth (network address). Likewise, this procedure facilitates an effective method for resource management of web application. For instance, a web application that is hosted on a relatively small node works on reduced cost of using entire box and still manages to provide resources from one node to another. In order to enhance the efficiency an unused resources in a box are moved. Optimal resource management is achieved by virtual server; we can also say that there is no requirement for deploying a web application and its components for migration of web services to some other hosts that are subjected to re-installation of new operating system. Consequently, virtualization fulfills the last process by utilizing a hypervisor. Likewise, the hypervisor hosts operating system that provides management of assets for many operating systems of visitors as well as nodes . Hence, as soon as a web application is deployed with virtualization technology, we can get a guest operating system powered by hypervisor. This is the major factor that provides scalability and assignment of more resources for the web application by clicking few buttons (Kusnetzky 2011). It is unnecessary to state that virtualization appeared in the year 1960 because a number of hypervisors are present to select from them. For the trendiest virtualization appliances are Xen and Virtual Box (Kusnetzky 2011). They are considered as open-source assignments due to their commercial popularity through corporations such as VMware and Nimbus data systems. However the process of virtualization is actually without responsibility. In fact, some disadvantages are also associated with its implementation. For example, â€Å"a hardware box's configuration is not clear to node users. A hardware box could be near its overall hardware limit, in which case more resources for a node could be limited , even requiring migration to another box†. In addition, it could appear as a weak virtualized resource for instance I/O capacity. In this situation various nodes are present in similar boxes try to interpret form the matching pair of hard drives thus resulting in amplified latency. Moreover, the sidebar contains more