I've installed Veeam on my development server and the initial backup is 2TB. It's hammering the disk system so much that other services (e.g. web server) are struggling. I've added throttling to the LAN but I don't think it's making any difference - one assumes because the backup traffic is not going across the network:
Is there anyway to throttle the backup on the server itself?
If you back up a physical server by Veeam B&R, then you may try the option "Throttle agent activity on" in the protection group settings. Veeam sets low priority for Veeam Agent components running on protected computers and involved in the backup process.
Small clarification: global throttling rules works for agents as well, however you need to make sure that the rule is applied between Veeam components (so you can limit the network usage between backup agent and repository). The way how aggressively agent is utilizing the local disk, indeed, needs be controlled via Protection Group settings. Cheers!