Re: [Users] which file system for shared disk?

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.