Installation guide

Templates Overview

Differences Between OS and Application EZ

Templates

Actually, there are four major differences between OS EZ templates and application templates:

• OS templates are used to create new Containers, whereas application templates provide

additional software for already created Containers.

• OS templates may and usually do use action scripts, whereas application templates cannot use

action scripts in the current version of Parallels Virtuozzo Containers.

• You may define a list of compatible templates and a list of required templates for application

templates.

• OS templates and their updates are cacheable, whereas application templates and their

updates are not.

The last point needs further explanation. The fact is that creating a huge number of symlinks to the

OS template when creating a Container (i.e. its private area) may take a very considerable amount

of time. To reduce the time needed for creating a new Container, you should use the vzpkg

create cache command allowing you to make a tarball of the potential private area of a

Container based on the corresponding template. This tarball is also located in the

/vz/template/cache directory. When a Container is being created, the tarball is simply

deployed into the Container private area.