To keep it brief-KVM (Kernel-based Virtual Machine) is a functionality of Linux that allows the utilization of one physical server as multiple virtual computers. If you have a modern Linux system, KVM is already included as a part of the kernel and is readily available for use. It essentially transforms your Linux PC or server into a hypervisor, which works similar to VMware ESXi or Microsoft Hyper-V.
When I first experimented with KVM on my Ubuntu computer I was surprised by how quickly and easily it worked. There was no additional software or licensing needed-it simply worked!
Here are some of the factors that make KVM favorable with users:
1. Cost
• KVM: Free - You pay nothing.
• VMware ESXi: Paid product - to enable full features.
• Hyper-V: Free with Windows Server, but license required for some features.
If you are concerned about money, KVM should be your choice.
2. Speed and performance
KVM is part of Linux, therefore runs very effectively. VMware and Hyper-V have a solid performance, but KVM offers very similar speeds or better, especially on Linux-based servers.
3. Management tools
VMware has well-known features such as vCenter that are easy to use. Hyper-V integrates seamlessly with Windows Server. KVM is flexible - you can use it with a Proxmox, oVirt, or OpenStack that allows you to have similar functionality as these tools.
4. Compatibility
VMware and Hyper-V operate best within a closed ecosystem, while KVM truly thrives in an open-source landscape and permits deeper customization to suit your needs.
Have you ever wanted to build a small data center at home? KVM allows you to do just that!
When I first experimented with KVM on my Ubuntu computer I was surprised by how quickly and easily it worked. There was no additional software or licensing needed-it simply worked!
How KVM Functions
KVM relies on the CPU aspects of your computer such as Intel VT-x or AMD-V to create and provision virtual machines. These virtual machines behave like a real computer-each virtual instance can run an operating system that is independent of the others.Here are some of the factors that make KVM favorable with users:
- It’s free and open-source
- It is built natively into Linux hence fast peed and better security
- Can be managed easily through tools like virt-manager or manually through command line
- Live migration support which allows for moving VMs between servers without powering them off.
KVM vs VMware ESXi vs Hyper-V
Next, we will summarize their similarities and differences.1. Cost
• KVM: Free - You pay nothing.
• VMware ESXi: Paid product - to enable full features.
• Hyper-V: Free with Windows Server, but license required for some features.
If you are concerned about money, KVM should be your choice.
2. Speed and performance
KVM is part of Linux, therefore runs very effectively. VMware and Hyper-V have a solid performance, but KVM offers very similar speeds or better, especially on Linux-based servers.
3. Management tools
VMware has well-known features such as vCenter that are easy to use. Hyper-V integrates seamlessly with Windows Server. KVM is flexible - you can use it with a Proxmox, oVirt, or OpenStack that allows you to have similar functionality as these tools.
4. Compatibility
VMware and Hyper-V operate best within a closed ecosystem, while KVM truly thrives in an open-source landscape and permits deeper customization to suit your needs.
Why I Like KVM
I like KVM because it's simple, fast, and free to use. I have unlimited VM builds (assuming the OS is licensed) and no license fees, unlike VMware and Hyper-V, I have full control.Have you ever wanted to build a small data center at home? KVM allows you to do just that!