1.1. Requirements for Standalone Installations

The recommended hardware requirements for running Virtuozzo Hybrid Server 7 as a standalone installation are as follows:

  • x86-64 platform with hardware virtualization support: Intel VT-x (with “unrestricted guest”) or AMD Virtualization (tested only on AMD EPYC).


    To check if the Intel processor supports the “unrestricted guest” feature: 1) Download vmxcap.py from https://github.com/qemu/qemu/blob/master/scripts/kvm/vmxcap, 2) Run python vmxcap.py | grep -i unrest. The result must be yes.

  • CPUs: at least 4 cores, a 64-bit processor is required for running 64-bit guest operating systems.

  • RAM: 4 GB or more.

  • HDD: the minimal required disk size is the sum of the minimal /vz and root partitions, as well as the swap size:

    min_hdd_size = min_vz_size + min_root_size + swap_size

    Where min_root_size is 12 GiB, min_vz_size is 30 GiB, and swap_size depends on the RAM size. See Partitioning the Hard Drives for more details.

  • SSD (optional): at least 30 GiB (at least 32 GiB with /boot).

  • Network: an Ethernet network adapter and a valid IP address.

The actual number of virtual machines and containers you can run on a physical server and their performance depend on resources they will consume.

1.1.1. System Limits

The table below lists the current hardware limits for Virtuozzo Hybrid Server 7 servers:





64 TB

1 TB


1 EB

50 TB