A guide to server virtualisation
Server virtualisation has revolutionised the way we use servers. It allows one physical server to be divided into multiple virtual servers, making it a key technology behind services like VPS hosting. This guide will explain what server virtualisation is, how it works, and why it’s so important.
What is Server Virtualisation?
Server virtualisation is the process of dividing a single physical server into multiple virtual instances. This is done using specialised software. For example, if you use VPS hosting, your virtual private server was created through server virtualisation.
This technology also masks server resources. Users cannot access sensitive information like the number of processors, operating systems, or physical servers. This ensures security and efficiency.
How Does Server Virtualisation Work?
A hypervisor makes server virtualisation possible. This software sits between the physical server and the virtual machines (VMs). It virtualises the server’s resources, allowing them to be shared across multiple VMs.
The hypervisor creates and manages these virtual servers. It ensures each VM operates independently, even if they share the same physical hardware. This makes server virtualisation a powerful tool for businesses and hosting providers.
Types of Server Virtualisation
There are three main types of server virtualisation. Each method divides a physical server (the host) into virtual servers (the guests).
Full Virtualisation
Full virtualisation uses a hypervisor to manage resources. The hypervisor communicates directly with the host server’s CPU. Each virtual server runs its own operating system. For example, you can run Linux and Windows on the same physical server.
The hypervisor ensures resources are allocated correctly. However, it uses some of the server’s resources, which can slightly reduce performance.
Para-Virtualisation
Para-virtualisation also uses a hypervisor, but the process is different. In this method, the virtual servers are aware of each other. This reduces the hypervisor’s workload, improving efficiency.
OS-Level Virtualisation
OS-level virtualisation does not use a hypervisor. Instead, the host server’s operating system manages the virtual servers. However, all virtual servers must use the same operating system. If the host OS fails, all virtual servers are affected.
Benefits of Server Virtualisation
Server virtualisation offers many advantages. Here are some of the key benefits:
Server Consolidation
Virtualisation makes physical servers more efficient. One server can host multiple virtual servers, reducing the need for additional hardware. This saves space and resources.
Versatility
Virtual servers can run different operating systems on the same physical server. This flexibility allows businesses to meet diverse needs without investing in extra hardware.
Reduced Operating Costs
Fewer physical servers mean lower costs. Data centres use less power, and businesses save money on hardware and maintenance.
Affordable Web Hosting
Virtualisation makes hosting more affordable. Services like VPS hosting allow users to rent virtual servers at a fraction of the cost of a physical server.
Better Disaster Recovery
Virtual servers are easier to manage during hardware failures. You can migrate a virtual server to another physical server without losing data or access.
Uses of Server Virtualisation
Server virtualisation has many practical applications. Here are some of the most common uses:
Support for Multiple Operating Systems
Virtualisation allows businesses to run different operating systems on the same server. This is ideal for companies that need both Linux and Windows environments.
Practising Redundancy
Redundancy ensures backup systems are in place. Virtualisation lets businesses create duplicate virtual servers without needing additional physical hardware.
Testing and Development
Developers use virtual servers to test new software and updates. They can clone a virtual server to create a safe testing environment without affecting the live system.
Final Thoughts
Server virtualisation is a game-changer for businesses and hosting providers. It improves efficiency, reduces costs, and offers flexibility. Progressive Robot uses this technology to provide reliable VPS hosting solutions.
If you want to learn more about server virtualisation or need help choosing the right hosting plan, contact Progressive Robot today.
Email or chat with us for more details.
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