W dniu 11.07.2013 12:02, Itamar Heim pisze:
On 07/11/2013 11:52 AM, Piotr Szubiakowski wrote:
The way that oVirt manage storage domains accessed via FC is very smart. There is separate logical volume for each virtual disk. But I think that logical volume at the same time could be "touched" only by one host. Is it possible that two host access read/write the same logical volume and there is no data corruption?
hence a shared disk over block storage using LVM must be pre-allocated, so no LV changes (lv extend) would be needed. (also, it cannot have snapshots, since it would become qcow)
Ok, but this is the hypervisor view. For a guest OS this LV is normal RAW block device. I wonder if someone test this feature and access shared disk from many VM's at the same time?
it was tested, but it has to be RAW/pre-allocated or either LV metadata changes or qcow changes need to be changed in more than a single host.
During this tests have You used any cluster file system? Thanks, Piotr