Using Virtuozzo File System

Virtuozzo File System (VZFS) is a legacy file system that allows sharing common files among multiple Containers without sacrificing flexibility. Container users can modify, update, replace, and delete shared files. When a user modifies a shared file, VZFS creates a private copy of that file transparently for the user. Thus, modifications do not affect other users of the same file.

Although VZFS can help you save disk space and memory, it also has a number of limitations:

• You cannot store Containers using VZFS in Parallels Cloud Storage clusters.
• To migrate or restore a Container, you always need to have a corresponding OS template installed on the destination server.
• VZFS-based Containers lack some functionality provided by Parallels Cloud Server 6.0 (like creating and managing snapshots).

Note: For more information on VZFS, see the documentation for Parallels Server Bare Metal 5.0.