zfs discuss - Oct 2006 - ZFS file system create/export question

Hi,

I am wandering HOW ZFS ensures that a storage pool isn''t imported by
two machines at one time? Does it stamp the disks the hostID or hostName?  Below
is a snipplet from the ZFS Admin Guide. It appears that this can be overwritten
with import -f.

importing a pool that is currently in use by another system over a storage
network can result in data corruption and panics as both systems attempt to
write to the same storage.

ljs
 
 
This message posted from opensolaris.org

Please don''t crosspost

On 10/10/2006, at 11:22 PM, Luke Schwab wrote:
> I am wandering HOW ZFS ensures that a storage pool isn''t imported
> by two machines at one time? Does it stamp the disks the hostID or  
> hostName?  Below is a snipplet from the ZFS Admin Guide. It appears  
> that this can be overwritten with import -f.
It doesn''t. It will mark the pool as imported, but it won''t
stop you
from forcing import on another machine. Hence the message below.
> importing a pool that is currently in use by another system over a  
> storage network can result in data corruption and panics as both  
> systems attempt to write to the same storage.