josedieguez on my experience Dedicated servers with HDD, receiving backups from more than 2-3 servers is just plain slow.
I am curious, how did you test this? I am not trying to be smart; instead, I am interested in getting smarter 🙂
Maybe it was rsync between servers in the same DC, and you were backing up 3 x SSD or NVME servers on a target with HDD where the network speed was capping HDD write speed, but even then, it is a good thing. It will go slower and will not kill the SSD/NVME (production server)
I do not see an issue with a backup server maxing on write for the time of the backup. But i guess if you backup 3 x servers at the same time, you probably got it wrong on schedule 🙂
Regarding Enhance backups and backup servers.. it is software, and maybe it is not very efficient at this point in time (I am only guessing) for me works, but it can be optimised in future and can be programmed to be smarter to block backups and do /server backups or some automation in the background to achieve best results.. (there is no limit at how smart it can get if enhance team will have the time to work on the backup process), I believe Enhance team will do a good job with this in the future.
On another note, S3? Faster than a dedicated server? .. ok 🙂