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.

[ICO]NameLast modifiedSizeDescription

[DIR]Parent Directory  -  
[DIR]old/15-May-2016 05:00 -  
[   ]vzdump-1.2.tar.gz22-Oct-2009 04:25 20K 
[   ]vzdump_1.2-4_all.deb22-Oct-2009 04:25 26K 
[   ]vzdump-1.2-4.noarch.rpm22-Oct-2009 04:25 29K 

Apache/2.2.15 (CentOS) Server at download.openvz.org Port 80