Limit Restore Impact

Well I guess I will have to handle this at my storage with QOS. This is a pretty big feature that proxmox is missing and has a big impact on the enviroment.
 
on the CLI, you can pass the backup file to qmrestore in a rate limited fashion via stdin - maybe this is an option?
 
you can use 'pv' or 'cstream' or the like in a pipe, and qmrestore accepts '-' as archive path to read from STDIN.