The server you choose, whether virtual or physical, can significantly impact your operations. Each offers a distinct approach to hosting and running applications in an IT infrastructure. Virtual servers offer scalability and cost efficiency while physical servers provide unmatched performance and security. In this article, we will explore the key differences between the two and guide you through the decision making process to find the ideal solution for what you need.
What is a physical server?
A physical server is a hardware server that is used for running applications, storing, retrieving and sharing data with other computers on a network. A physical server is tangible, and is like a desktop PC but much powerful and bigger in size. Much like a personal PC, a physical server is dedicated to providing applications, multiple network connections and data to a single user which means that resources are not shared with other users.
Physical servers offer high performance and are more consistent and predictable due to resource allocation. It allows you to store information over a network, and shares information with other computers through either local area network (LAN) or wide area network (WAN) such as the internet. This server is ideal for those who are looking for increased storage capabilities and performance from their operating systems. Examples of a physical server include a file server, print server, applications server and email server.
Advantages of a physical server
For businesses with high-performance demands, a physical server can offer a range of benefits that virtual servers may not be able to match.
High performance and reliability: As physical servers don’t share processors or components in a way they virtual servers do, they can deliver greater performance. This ensures you don’t experience lags, even during peak times.
Enhanced security: Physical servers are more secure because they are isolated from other users. There’s no risk of security vulnerabilities stemming from shared virtual environments, making them a good choice for businesses with sensitive data.
Customisable: Physical servers can be fully customised to meet your business’ unique needs. You can choose specific hardware configurations, such as more powerful processors, more RAM or additional storage.
Long term cost efficiency: Although physical servers have higher upfront costs, they can become more cost effective over time, especially for businesses that require high performance or have predictable workloads.
Disadvantages of a physical server
While there are numerous advantages, there are also a set of challenges that come along with physical servers.
High initial cost: Physical servers typically require a larger upfront investment. Not only do you need to purchase the hardware itself, but there are also costs for installation, maintenance, configuration and set up.
Limited scalability: If your business needs grow or change, you may need to purchase additional hardware or even completely replace your server to keep up with demand, making scalability more time consuming and costly.
Implementation:Â As physical servers need to be physically installed, there is a higher need for specialised support and requires monitoring and management.
Underutilisation: If demand for server resources fluctuates or is low, a physical server may end up being underutilised, resulting in inefficiencies.
What is a virtual server?
A virtual server is a software based or virtual version of a physical server and it works like an actual computer. A virtual server runs in a virtual environment where the resources of a physical server are shared with other virtual servers. All VM’s (Virtual Machines) are located on high performance physical servers and the virtual environment is created using a technology called virtualisation and has its own CPU, RAM and storage allocation from the physical server resources.
Virtual servers are managed by a hypervisor, a software layer that divides the physical server’s resources among multiple virtual servers. This allows organisations to host several virtual servers on one physical machine, maximising resource efficiency while keeping each virtual server isolated.
Advantages of a virtual server
Virtual servers have changed the way businesses manage their IT infrastructure, offering a range of benefits that make them a popular choice over physical servers. It also allows moving of VM’s to another physical server in the event of any down time on the hosting physical server, creating a resilient environment.
Cost efficient: Virtual servers reduce the need for multiple physical machines which in turn lowers hardware costs. Additionally, they optimise resource usage, meaning you only pay for the capacity you need, however there are VM licensing costs to take into consideration per VM.
Scalability: Virtual servers are highly scalable, making them highly adaptable and ideal for organisations with changing workloads or in the midst of growth.
Reduced downtime: Virtualisation technology includes tools for failover, backup, and replication, which improve reliability. If a physical host fails, virtual servers can quickly be migrated to another host, reducing downtime.
Environmentally friendly: By consolidating multiple virtual servers onto fewer physical machines, virtualisation reduces power consumption and cooling requirements, lowering the environmental impact of IT operations.
Disadvantages of a virtual server
While virtual servers offer cost savings and scalability, they do also come with some drawbacks.
Lower performance: Due to virtual servers sharing resources, efficiency and stability is reduced which can lead to a slight performance degradation.
Complex setup: While virtualisation simplifies scaling and resource allocation, the initial setup and ongoing management can be complex, requiring specialised skills to configure and maintain.
Limited for certain workloads: Virtual servers may struggle to handle resource intensive workloads, such as real time data processing, as they lack the dedicated hardware resources of physical servers.
Security vulnerability: Additional security risks are introduced with virtual servers. If the hypervisor is compromised, it could potentially give attackers access to all virtual machines that run on the same physical hardware.
The key differences between a physical server and a virtual server
Physical servers are standalone machines that have dedicated hardware resources, running a single operating system tailored for specific tasks, providing consistent performance and enhanced security. However, they are less flexible and have limited scalability, requiring significant maintenance and higher upfront costs.
On the other hand, virtual servers are software based, created through virtualisation to share the resources of a physical server while operating independently. They offer high scalability, flexibility and easier maintenance, though resource sharing can impact performance under heavy workloads and they may involve increased vulnerability.
Physical servers are ideal for resource intensive workloads, while virtual servers suit dynamic workloads. Ultimately, the best choice depends on your specific needs, budget, and long term goals.
Ensure peak performance for your servers
Whether you’re managing physical servers, virtual servers, or both, proper maintenance is key to keeping your systems running smoothly. At Smart CT, our server and storage maintenance services are designed to enhance performance, reduce downtime and extend the lifespan of your IT assets. Get in contact with us today to find out more.