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
[PARENTDIR] Parent Directory - [DIR] old/ 2016-05-15 11:00 - [TXT] HEADER.html 2007-07-09 10:06 532 [   ] vzdump-1.2-4.noarch.rpm 2009-10-22 10:25 29K [   ] vzdump-1.2.tar.gz 2009-10-22 10:25 20K [   ] vzdump_1.2-4_all.deb 2009-10-22 10:25 26K
Apache/2.4.25 (Debian) Server at mirror.checkdomain.de Port 443