This always depends on the scope of use of the server, among the scalable KVM servers can be at any time:

- CPU cores
- RAM
- IP addresses
- SSD memory

be extended;

- CPU cores
- RAM
- IP addresses

can then be cancelled again at any time.
(The booked SSD memory can be cancelled again only in the case of a reinstallation).

So the scalable servers are also a bit more expensive, as the booked power can be adjusted to the workloads on demand.
The KVM Server packages configurations can also be changed at any time between the following packages;

- ProServer S
- ProServer M
- ProServer L
- ProServer XL
- ProServer XXL

here the hard disk can be optionally increased, if this is the case the server can only be downgraded again by reinstallation.

Currently, the following distributions can be set up automatically via the customer panel.

CentOS 7
CentOS 8
Debian Buster 10
Ubuntu Bionic 18.04
Ubuntu Focal Fossa 20.04

Other operating systems such as Windows Server, CentOS, Fedora, etc. can be set up manually via mounted ISO.

This is possible on request, once your ISO image file has been maintained by us into the system,
you can mount and use the ISO at any time in any virtual server.