Network virtualization can be used as turning point in eventually gathering all network resources to be placed on your desktop screen. So to begin with, how can network virtualization be achieved?
The installation of software and services on your computer is the first thing to do to manage the sharing of storage, computing cycles and applications. Furthermore, network virtualization can make the hardware and software lower their cost when it comes to running data centers and corporate networks. What’s good about network virtualization is its capacity to give the servers and the data managers the control to manage computing and storage capacity.
In some cases, software-based administrative entity provides storage virtualization, grid computing, and distribution of application services which are all considered useful since some multinational companies use this technology in providing network-like functionality on a single network system.
To further make things clear, it should be noted that network virtualization is classified into two which can be either internal virtualization or external virtualization. The decision of choosing what classification of network virtualization will be implemented depends on the preference of the company. So, how can the two network virtualization be defined?
In external network virtualization one or more local networks can be either put together or subdivided into virtual networks. However the aim of improving the efficiency of a large corporate network or data center remains as the main objective. Network switch is the main component of external virtualization wherein the administrator can organize systems which are actually connected to the local network into different virtual networks.
On the other hand, internal virtualization is just a single system which is configured with containers to create a network confine in a box. The good thing about internal virtualization is that, the single system is absolutely efficient since containers and pseudo interfaces can be separated.
OS virtualization is also known as OS-level or shared OS virtualization wherein its main task is to virtualize the servers of the OS layer or kernel. Multiple isolated user-space instances which are also called as containers,VEs, VPSs plays trick by looking like a an authentic server.
The operating system virtualization is frequently utilized in virtual hosting environments. OS virtualization is very helpful in allocating hardware resources (which are finite in nature) amidst an enormous population of mutually-distrusting clients or users.
For minimal usage, OS virtualization can be also utilized in merging server hardware. This happens when services on separate hosts are moved into the containers of the other server. Separate containers in some instances have improved security, hardware independence, and supplementary resource management attributes.
The OS virtualization has drawbacks and benefits depending on what form of virtualization we are talking about. Forms of virtualization can affect overhead OS virtualization, flexibility OS virtualization, and storage OS virtualization which can be advantageous and disadvantageous.
For overhead, virtual partition programs use OS’s normal system call interface and it doesn’t require emulation or run the whole system virtualizers. Hence, in performing efficiency overhead doesn’t need hardware-assistance.
The OS-level virtualization is not as flexible if we are to compare it with other virtualization processes because it can not host a visitor’s operating system given that it is different from the host or the kernel. For instance, OS like windows can not be hosted by Linux OS.
Finally, one advantage of OS virtualization is its capacity to presents file-level-on-copy-on-write mechanisms. In this case when partitions are created and shared, partitions themselves can automatically create their own copies of files.