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KVM and OpenVZ VPS hosting?
Nokachishikimikika
Member
in General
Roughly speaking, which one is better - KVM and OpenVZ VPS hosting?
Or perhaps are they're so close that the average user won't see a difference?
Comments
KVM is better, period.
KVM.
KVM - you have your own kernel
OpenVZ - you share same kernel as host
OpenVZ has lower memory consumption because one kernel can be shared among all instances at a cost of flexibility - you have fixed kernel version and if something doesn't work on it (Docker, Wireguard etc.) or you want to do some advanced stuff then either you can't do it or provider needs to fix that.
On KVM you're on your own, you can install even Windows if you want - this is not possible at all on OpenVZ.
OpenVZ is beneficial to provider mostly. If you have same specs then always choose KVM.
OpenVZ is essentially dead now. It needs to use old Linux kernels since it's a lot of manual work for Virtuozzo to update their patches to work on newer versions. It'll never be merged into the kernel like KVM and LXC were, so this is always going to be a limitation of OpenVZ.
If you want virtualization, use KVM or Xen. If you want containerization, use LXC. OpenVZ doesn't really have a place any more.