[Users] which file system for shared disk?

[Piotr Szubiakowski]

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