> Software wise it is the same deal. Each node streams off only disk 4 > to the new node.
I think an implication on software is that if you want to make specific selections of partitions to move, you are effectively incompatible with deterministically generating the mapping of partition to responsible node. I.e., it probably means the vnode information must be kept as state. It is probably difficult to reconcile with balancing solutions like consistent hashing/crush/etc. -- / Peter Schuller (@scode, http://worldmodscode.wordpress.com)
