Vzdump is a tool to make consistent snapshots of running OpenVZ containers. Vzdump stores the backup on the disk in a single file, a tar archive, which also includes the CT configuration files. This archive can be used to clone or to restore a system.
There are a few items required for installing vzdump for OpenVZ on CentOS.
First we need Simple Locking file I/O library for Perl and cstream. Both packages are available at the Dag Wiers repository. If you haven't setup the Dag Wiers repository follow the instructions explained on this website.