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

[PARENTDIR]Parent Directory   -  
[DIR]old/ 2016-05-15 05:00 -  
[   ]vzdump-1.2-4.noarch.rpm2009-10-22 04:25 29K 
[   ]vzdump-1.2.tar.gz 2009-10-22 04:25 20K 
[   ]vzdump_1.2-4_all.deb 2009-10-22 04:25 26K