KVM, Made More Powerful with 200+ Enhancements

KVM (Kernel-based virtual machine) — the most popular open source hypervisor — has gained significant traction over the last few years. And Virtuozzo has made it even more powerful. Our hypervisor uses the open source core of KVM, but adds more than 200 enhancements.

Our virtual machines are based on CentOS7 kernel-based virtual machine and the modern ported version of QEMU. We pushed all of our enhancements to the upstream community, ensuring they will be supported in subsequent KVM versions and to ensure no lock-in.

Virtuozzo Hypervisor with optimized kernel-based virtual machine is included in the Virtuozzo Platform.


“As a trusted partner that consistently outperforms other vendors, we will continue to look first to Virtuozzo for new technologies, like KVM and Docker, for our next-generation of service tiers.”

– Todd Robinson, president, InMotion Hosting


Why use Virtuozzo Hypervisor with Optimized KVM over Standard KVM?

Kernel-based virtual machine projects require careful assembly, fine tuning, security setting defaults, and additional services such as backups and high availability. Otherwise, the overall solution won’t satisfy strict production requirements. Virtuozzo Hypervisor takes the hassle of managing all of that away.

Unlike alternative hardware virtualization solutions, Virtuozzo delivers better performance on a smaller infrastructure footprint. You can focus your engineering on building business value rather than supporting infrastructure.


Key Features

  • Improved density with AMM, auto ballooning, and Kernel same-page merging
  • KVM/QEMU cache optimizations
  • Set of kernel patches improving performance
  • Windows drivers with Hyper-V enlightenments
  • Powerful guest tools


  • Proven backup solution shipped by default
  • Reduced overall maintenance
  • Low cost
  • Software-defined storage runs together with compute
  • Upstream compatible and commitment to open standards

By the Numbers

  • 100% upstream kernel-based virtual machine compatible
  • Up to 40% better performance results for latest Linux and Windows Operating Systems
  • 30% higher density than standard KVM
  • 24x7 highly skilled professional support

Performance Test: CentOS7 KVM vs Virtuozzo Hypervisor


This graph depicts a SPECvirt performance test of Linux workloads for CentOS 7 KVM versus the Virtuozzo Hypervisor. Tiles represent a set of workloads. A single tile deploys a number of different workloads, each of them generating output transactions. Here we measure the output total of all transactions.

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