16 Mar
2016
16 Mar
'16
9:17 a.m.
Hi,
On Tue, 15 Mar 2016, Arto Bendiken wrote:
What is a "power reset of a virtual machine"? A virtual power reset (i.e. reset), or a power reset of the host? In the latter case some writes that the VM considers done may not be committed on the host, depending on the exact configuration. You didn't give any details on that, so I can only guess...
The latter, with the VM's virtio disks being LVM volumes assigned and dedicated to it using libvirt--a run-of-the-mill configuration.
LVM does an extremely bad job of properly implementing write barriers so you can achieve an inconsitent state that is hard to recover from.
Greetings Christian
--
Christian Kratzer CK Software GmbH
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