User`s guide

Glossary 209
Template (or package set). A set of original application files (packages) repackaged for
mounting over Virtuozzo File System. There are two types of templates. OS Templates are used
to create new Containers with a pre-installed operating system. Application templates are used
to install an application or a set of applications in Containers.
UBC. An abbreviation of User Beancounter.
User Beancounter. The subsystem of the Parallels Server Bare Metal software for managing
Container memory and some system-related resources.
Virtual Environment (or VE). An obsolete designation of a Container.
Virtuozzo File System (VZFS). A virtual file system for mounting to Container private areas.
VZFS symlinks are seen as real files inside Containers.
Virtual machine (VM). A computer emulated by Parallels Server Bare Metal. Like a Container, a
virtual machine is functionally identical to an isolated standalone computer, with its own IP
addresses, processes, files, its own users database, its own configuration files, its own
applications, system libraries, and so on. However, as distinct from Containers, virtual machines
run their own operating systems rather than sharing one operating system kernel.