Which server model to choose for DHCP and NTP?

Question

Iron

1. At the enterprise it is necessary to raise the DHCP / NTP server. Which model do you think is worth buying?
2. Is it worth it to raise it all on separate virtual machines under ubuntu server.
3. what server model should be taken under the document server. Volume max 2 tb

Answer 1

Out of habit, I raise an NTP server on every Linux host, it takes one minute

sudo systemctl disable systemd-timesyncd
sudo apt install ntp

Just "why not", the host's resources eat up (conditionally) 0.0001%.
The DHCP server also eats up very few resources, this is an easy task even for soapbox routers, so the question of choosing a server also sounds funny. Simply added to any server that performs some other task. You can move it to a virtual machine - for reasons of quick migration of a VM to another host, when necessary. And even in this case, you can perfectly do without a virtual machine. But in the order of enthusiasm, you can use a virtual machine :)
3. depending on what you call a "document server", specify. If the usual "file dump" (aka "file server"), then you can pick up a ready-made iron NAS. If you want a real server, any one is also good.
Depending on the budget, such things are assembled on the basis of a PC that is morally obsolete and no longer suits the user - in this case, the budget is spent only on new disks. For 20-50 users, this option should be enough. The speed is mainly determined by two bottlenecks - the speed of disks (more precisely, the disk subsystem) and the speed of the network.
It makes no sense to offer more expensive options yet, because. You didn't specify a budget or the number of users.

Answer 2

You can buy \ remake a cool piece of iron for virtual machines. Take some Supermicro SYS-6028R-C1 for $6t Install ESXi there, and fill it with at least 10, at least 40 virtual servers. This is more profitable than keeping a piece of iron for every case. For example, you can put AD with DHCP there, a file server, a mailer, a 1C server, an asterisk, and something else. In the same place, you can conveniently solve the problem of backing up and transferring servers from one piece of hardware to another