zfs/zpool upgrade required?

[Robert Schulze]

Hi,

Am 04.05.2011 13:55, schrieb Jeremy Chadwick:
>> Is it _required_ to upgrade existing pools and filesystems or can
>> that be done anytime later?
>
> - It can be done later, though by not upgrading you lose the ability to
> use newer features.

well, the features are not the reason to upgrade the kernel. One more 
question: could the pools and filesystems be upgraded while there is 
pressure on them, or shall this procedure be made "offline", i.e. 
without any clients accessing the machine?

with kind regards,
Robert Schulze