[linux-lvm] What is holding back clustered snapshotting?

[Madison Kelly <linux alteeve com>]

Hi all,

  I know that, currently, this isn't supported. Would someone be able 
to explain or point me at a place to read up on what is holding this 
feature back? What are the difficulties? Is it just a question of time, 
or are there certain technical hurdles in the way?

  Thanks for any input!

Madi