Proxmox : vzdump performance optimization
Just found this on the Proxmox Wiki https://pve.proxmox.com/wiki/Performance_Tweaks#VZdump stating that the default value for vzdump is limited to 10000 Kbps (10 Mbps). This might explain even my misunderstanding why backups to my NAS are pretty “slow”
sudo vi /etc/vzdump.conf
showed that the original line in Proxmox 3.2 is #bwlimit: KBPS which I changed for now without notable issues to
bwlimit: 40000
However James Coyle mentioned running into another issue with a too high value on undersized servers. http://www.jamescoyle.net/how-to/290-limit-backup-io-bandwidth
You should keep that in mind if you are about to bring your server down while running vzdump backups.
