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  -  
[TXT]HEADER.html2007-07-09 20:06 532  
[DIR]old/2016-05-15 21:00 -  
[   ]vzdump-1.2-4.noarch.rpm2009-10-22 21:25 29K 
[   ]vzdump-1.2.tar.gz2009-10-22 21:25 20K 
[   ]vzdump_1.2-4_all.deb2009-10-22 21:25 26K 

Apache/2.4.25 (Debian) Server at mirror.webtastix.net Port 80