What’s the new future of Server Virtualization
What is server virtualization ?
Server virtualization is the masking of server resources, including the number and identity of individual physical servers, processors, and operating systems, from server users. The server administrator uses a software application to divide one physical server into multiple isolated virtual environments. The virtual environments are sometimes called virtual private servers, but they are also known as guests, instances, containers or emulations.
There are three popular approaches to server virtualization:
1)The virtual machine model
2)The paravirtual machine model
3)virtualization at the operating system (OS) layer.
Networkking4u Explain Server Virtualization
Typical enterprise data centers contain a huge number of servers. Many of these servers sit idle as the workload is distributed to only some of the servers on the network. This results in a waste of expensive hardware resources, power, maintenance and cooling requirements. Server virtualization attempts to increase resource utilization by partitioning physical servers into several multiple virtual servers, each running its own operating system and applications. Server virtualization makes each virtual server look and act like a physical server, multiplying the capacity of every single physical machine.
The concept of server virtualization is widely applied in IT infrastructure as a way of minimizing costs by increasing the utilization of existing resources. Virtualization servers is often a good solution for small- to medium-scale applications. This technology is widely used for providing cost-effective web hosting services.
What is Server Virtualization in Networking?
Server virtualization is the technique of the usage of software on a bodily server to create multiple walls or “virtual times” every capable of running independently. Whereas on a single devoted server the complete device has handiest one instance of an operating system, on a digital server the same system may be used to run multiple server instances each with impartial working device configurations.
Is Server Virtualization Right for Your Business?
Server virtualization consolidates multiple operating systems (OS) on a single server. Consider it in case you need to do any of the following:
1-Use more packages and OS without breaking budgets for hardware, power, and space.
2-Reduce the hours that IT body of workers spend on installing, patching, administering, and assisting packages servers.
3-Add garage virtualization to lessen application downtime and simplify backup.
4-Master cloud challenges. Having enjoy with virtual servers will put together your commercial enterprise for migrating other enterprise-essential offerings to the cloud.
5-Expand your technical skills. Learn how virtualization can converge structures and community operations.
Types of Server virtualization :
4)Hardware Assisted Virtualization
5)Kernel level Virtualization
6)System Level or OS Virtualization
Server Virtualization examples
The big blue square represents our physical server again.
Again, down at the bottom level we’ve got our hardware resources such as the CPU, RAM, and NIC.
On top of there, rather than installing a normal operating system like Windows, we install a hypervisor. The hypervisor is going to come from one of the server virtualization companies such as VMware. The hypervisor acts as the operating system on the physical server and it also allocates access to the underlying hardware to my virtual machines, which are explained next.
The first virtual machine gets installed in the hypervisor. At the bottom level in the virtual machine is its operating system. In our example Virtual Machine 1 is running Windows.
On top of Windows we install the email server application.
Then we install a second virtual machine onto the same underlying physical server. The second virtual machine is also running Windows as its operating system, but this is a separate instance of the operating system from Virtual Machine 1. The two virtual machines act as two completely separate servers.
Virtual Machine 1 and Virtual Machine 2 don’t know that they’re virtual machines, so there does not need to be any alteration to their standard operating systems.
On top of Windows on Virtual Machine 2, we install the database server application.
Virtual Machine 3 is running Linux as its operating system. On the same the same underlying server, we can have virtual machines that are running different operating systems.
On top of the Linux operating system we install the web server application.
This is similar to what I wanted to achieve before where I’m running all three of the different applications on one box so I get much better utilisation, but this way it fulfils my security, performance and availability issues because the three virtual machines act as completely separate servers.
Benefits of Server Virtualization
Virtualization can increase IT agility, flexibility and scalability while creating significant cost savings. Greater workload mobility, increased performance and availability of resources, automated operations – they’re all benefits of virtualization that make IT simpler to manage and less costly to own and operate. Additional benefits include:
- Reduced capital and operating costs.
- Minimized or eliminated downtime.
- Increased IT productivity, efficiency, agility and responsiveness.
- Faster provisioning of applications and resources.
- Greater business continuity and disaster recovery.
- Simplified data center management.
- Availability of a true Software-Defined Data Center..
Server Virtualization Using VMware
>Let’s go back to a time when there wasn’t a concept of server virtualization. We had data centers running a large number of machines; most of them were bought to run an application or a set of services. All those servers had enough CPU, memory, and storage capacity to host the application or the services that were running on it.
>The amount of compute and storage resources depended on what the application or the service would need during its peak load. However, the catch here is that not all servers execute peak load all the time. Research shows that more than 90% of hardware resources remain under-utilized.
>That is a huge number in terms of resource wastage. Running more than one application or service for the business always meant that there was a demand for additional hardware resources. Such a demand contributed to other factors such as power consumption, investment in cooling solutions, hardware maintenance, and the real estate space required to host all the hardware.
Now, a possible solution an administrator could have fantasized about would be to find a way…
Virtualization in Cloud Computing
Virtualization is the “creation of a virtual (rather than actual) version of something, such as a server, a desktop, a storage device, an operating system or network resources”.
In other words, Virtualization is a technique, which allows to share a single physical instance of a resource or an application among multiple customers and organizations. It does by assigning a logical name to a physical storage and providing a pointer to that physical resource when demanded.