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

On 07/11/2013 12:52 PM, 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? I did a brief tests - 3 vms, shared disk, cman/pacemaker + gfs2 - had no problems using it, no data corruption. although that was only basic tests, like create/move/delete files, no extensive usage/stress or something like that.