Saving a snapshot of a linux system

Question

linux

Tell me if you know of solutions for creating a complete snapshot of a working system with the ability to restore on the fly. For the testing process, it is necessary to provide conditions for the full reproduction of the results. As a possible solution, using hibernate with replacing swap partitions and rebooting, but this is long. Hypervisors and VMs are not considered due to their impact on results.

Answer 1

Well, everything is simple with hibernate - the same TuxIce.
Not such a problem if it weren’t for the snapshot also of the RAM

Answer 2

hibernate won't work. During hibernate, partitions are not unmounted and therefore they cannot be read / written until the work is completed normally.

Answer 3

But did not try to lay a certain percentage of the influence of the hypervisor, determined empirically?