KVM (Kernel-based Virtual Machine)

KVM (Kernel-based Virtual Machine)

KVM (Kernel-based Virtual Machine) is an open-source virtualization technology that allows you to create and run virtual machines (VMs) on Linux. It makes use of hardware virtualization capabilities of modern CPUs for efficient virtualization.
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virtualization vm linux open-source

KVM (Kernel-based Virtual Machine)

KVM (Kernel-based Virtual Machine) is an open-source virtualization technology that allows you to create and run virtual machines (VMs) on Linux. It makes use of hardware virtualization capabilities of modern CPUs for efficient virtualization.

What is KVM (Kernel-based Virtual Machine)?

KVM (Kernel-based Virtual Machine) is an open-source virtualization technology built into Linux. It allows you to create and run virtual machines (VMs) on any Linux server or desktop with hardware virtualization capabilities.

KVM is implemented as a kernel module that leverages the virtualization extensions of modern CPUs like Intel VT or AMD-V. This allows KVM to provide near native performance for virtualized workloads. KVM separates the physical hardware from the virtual machines, allowing you to run multiple VMs in isolation.

Some key capabilities and benefits of KVM include:

  • Very efficient and near native VM performance due to hardware acceleration support
  • Supports live migration of VMs between hosts for high availability
  • Allows overcommitting of resources for higher density
  • Open source and included by default in most Linux distributions
  • Backed by a wide community and support from companies like Red Hat

KVM is a core part of many enterprise grade virtualization platforms like OpenStack and is a popular choice for infrastructure virtualization, cloud computing and VPS hosting providers due to its performance and cost. It can also be managed through virtualization management platforms.

KVM (Kernel-based Virtual Machine) Features

Features

  1. Kernel-level virtualization
  2. Supports live migration of VMs between hosts
  3. Built into Linux kernel
  4. Leverages hardware-assisted virtualization
  5. Open source and free

Pricing

  • Open Source
  • Free

Pros

Good performance

Leverages hardware virtualization

Integrated into Linux

Active development community

Free and open source

Cons

Linux-only

Less features than proprietary solutions

Steeper learning curve than alternatives

No centralized management


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