In general, the guarantee is that B will do exactly as you say.... it will read the new value or the old value. Your question depends on a definition of "now" that spans several machines. That is a dangerous concept and if your reasoning requires it, you are headed for trouble.
On Thu, Apr 29, 2010 at 2:58 AM, Chen Bangzhong <bangzh...@gmail.com> wrote: > , what value will B read? new > value or older value? >