vzdump is an utility to make consistent snapshots of running OpenVZ VEs. It basically creates a tar archive of the VE private area, which also includes the VE configuration files.

There are several ways to provide consistency:

Taken from proxmox.com.

Icon  Name                    Last modified      Size  Description
[DIR] Parent Directory - [DIR] old/ 09-Jul-2007 03:59 - [   ] vzdump-1.0-2.noarch.rpm 28-Jun-2007 05:50 15K [   ] vzdump-1.0.tar.gz 28-Jun-2007 05:50 10K [   ] vzdump_1.0-2_all.deb 28-Jun-2007 05:50 13K
Apache/2.0.46 (CentOS) Server at download.openvz.org Port 80