OS virtualization software under the Odin brand from Parallels IP Holdings GmbH that partitions a Windows or Linux server into multiple execution environments (virtual environments). Based on Docker containers, Virtuozzo is noted for its performance and virtualization density (hundreds of apps can run simultaneously). See OS virtualization. OpenVZ OpenVZ is an open source version of Virtuozzo only for Linux servers. OpenVZ is supported by the company as well as the OpenVZ community. Over time, Virtuozzo may include enhancements to OpenVZ. For more information, visit www.openvz.org.