[CentOS] merge an lvm snapshot back

>You need to start by reading some of the docs on LVM2.
>
>eg. nothing stops you from mounting a snapshot back onto the same
>mountpoint you snaped from.

I understand that, but where I am unsure is how space in the vg relates to this? Will this not require much additional space, what if I need to do this a continued basis?

jlc